Powder metallurgy injection mold

Abstract

The utility model discloses a powder metallurgy injection mold which comprises a panel and a bottom plate, an upper mold and a mold foot are arranged on the opposite sides of the panel and the bottom plate respectively, a lower mold is arranged on the side, close to the upper mold, of the mold foot, the powder metallurgy injection mold further comprises an installation groove formed in the side, close to the upper mold, of the lower mold, and the installation groove is connected with a forming plate through a bolt. The forming plate is provided with a cavity, the lower mold is provided with an auxiliary assembly used for conducting auxiliary demolding on a formed workpiece in the cavity, four guide rods which are symmetrically arranged in pairs are arranged on the side, close to the upper mold, of the lower mold, and the mold feet are provided with ejector pin mechanisms used for conducting demolding on the formed workpiece. According to the utility model, through the arrangement of the auxiliary assembly, the adhesive force between the molded workpiece and the inner wall of the mold cavity is reduced, so that the separation process of the molded workpiece and the mold is more stable and mild, thereby reducing the risk of damages such as scratches and abrasion on the surface of the molded workpiece, and further improving the surface quality of the molded workpiece.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a powder metallurgy injection mold. Background Technology

[0002] In the process of using powder metallurgy injection molds, metal or ceramic powder is first mixed with organic binder in a certain proportion to form a feed material. The feed material is then heated to a certain temperature to make it fluid. Then, it is injected into the mold cavity under high pressure through an injection molding machine. The mold shapes the feed material. After the feed material cools and solidifies in the mold, the molded workpiece is ejected from the mold cavity by an ejector mechanism to obtain the molded workpiece.

[0003] In the powder metallurgy injection molding process, the molded parts and the mold cavity surface will adhere due to intermolecular forces, electrostatic adsorption and other reasons. Especially for parts with complex shapes and structures such as deep holes or grooves, the use of ejector pins to forcefully eject the parts will increase the risk of scratches, wear and other damage to the surface of the molded parts, thereby reducing the surface quality of the molded parts.

[0004] Therefore, there is an urgent need for a powder metallurgy injection mold to solve the above problems. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following technical solution: a powder metallurgy injection mold, comprising a panel and a base plate, wherein an upper mold and a mold foot are respectively provided on opposite sides of the panel and the base plate, and a lower mold is provided on the side of the mold foot near the upper mold. The mold also includes a mounting groove on the side of the lower mold near the upper mold, wherein a molding plate is bolted to the mounting groove, and the molding plate has a cavity. The lower mold is provided with an auxiliary component for assisting in demolding the molded workpiece within the cavity. Four guide rods are provided on the side of the lower mold near the upper mold, arranged symmetrically in pairs. The mold foot is provided with an ejector mechanism for demolding the molded workpiece.

[0006] The lower mold has four mounting holes on the side near the upper mold. The four mounting holes are arranged symmetrically in pairs and communicate with the mounting groove. The auxiliary component is disposed in the four mounting holes.

[0007] The auxiliary component includes an auxiliary plate slidably connected to the mounting hole. The auxiliary plate has a plurality of auxiliary rods arranged in a rectangular array on the side near the molding plate. The mounting hole is provided with a driving component for driving each auxiliary rod and a reset component for resetting each auxiliary rod after driving it.

[0008] The drive assembly includes a drive plate slidably connected to the mounting hole. Two sets of symmetrically arranged push members are provided on the side of the drive plate away from the auxiliary rod. Each push member includes multiple push blocks fixedly connected to one side of the drive plate. The two opposite sidewalls of each push block are provided with inclined surfaces. Two L-shaped plates are fixedly connected to the side of the auxiliary plate near the drive plate. Drive rods are fixedly connected to the two L-shaped plates near the drive plate. The two drive rods are located between two adjacent push blocks. The mounting hole is provided with a telescopic assembly for extending and retracting the drive plate.

[0009] The reset assembly includes a reset tube fixedly connected to the inner wall of the mounting hole on the side opposite to the molding plate. A reset rod is slidably connected to the reset tube. One end of the reset rod is connected to an auxiliary plate, and the other end of the reset rod is located inside the reset tube and fixedly connected to a reset plate. A reset spring is fixedly connected to the side of the reset plate away from the reset rod, and the other end of the reset spring is connected to the bottom wall of the reset tube.

[0010] The telescopic assembly includes a telescopic tube fixedly connected to the bottom wall of the mounting hole, a telescopic rod slidably connected to the telescopic tube, one end of the telescopic rod being connected to a drive plate, the other end of the telescopic rod being located inside the telescopic tube and fixedly connected to a telescopic plate, a telescopic spring being fixedly connected to the side of the telescopic plate away from the telescopic rod, and the other end of the telescopic spring being connected to the bottom wall of the telescopic tube.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention, through the setting of auxiliary components, utilizes the reciprocating vibration force of the drive component, reset component, and telescopic component to generate relative movement and slight displacement between the molded workpiece and the mold surface, thereby reducing the adhesion force between the molded workpiece and the inner wall of the mold cavity. This makes the separation process of the molded workpiece from the mold smoother and gentler, thereby reducing the risk of scratches, wear, and other damage to the surface of the molded workpiece, and thus improving the surface quality of the molded workpiece. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the auxiliary component location distribution structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the mounting hole structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the drive component structure of this utility model;

[0017] Figure 5This is a schematic diagram of the auxiliary component structure of this utility model.

[0018] In the diagram: 101, panel; 102, base plate; 103, upper mold; 104, mold foot; 105, lower mold; 2, mounting groove; 3, forming plate; 4, cavity; 5, ejector mechanism; 6, guide rod; 7, mounting hole; 801, auxiliary plate; 802, auxiliary rod; 901, drive plate; 902, push block; 903, inclined surface; 904, L-shaped plate; 905, drive rod; 1001, reset tube; 1002, reset rod; 1003, reset plate; 1004, reset spring; 1101, telescopic tube; 1102, telescopic rod; 1103, telescopic plate; 1104, telescopic spring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1

[0021] Please see Figures 1-5 The diagram shows a powder metallurgy injection mold, including a panel 101 and a base plate 102. An upper mold 103 and a mold foot 104 are respectively provided on opposite sides of the panel 101 and the base plate 102. A lower mold 105 is provided on the side of the mold foot 104 near the upper mold 103. The mold also includes a mounting groove 2 opened on the side of the lower mold 105 near the upper mold 103. A molding plate 3 is connected to the mounting groove 2 by bolts. The molding plate 3 has a cavity 4. The lower mold 105 is provided with an auxiliary component for assisting demolding of the molded workpiece in the cavity 4. Four guide rods 6 are provided on the side of the lower mold 105 near the upper mold 103, arranged symmetrically in pairs. The mold foot 104 is provided with an ejector mechanism 5 for demolding the molded workpiece.

[0022] It should be noted that during the use of this powder metallurgy injection mold, metal or ceramic powder and organic binder are first mixed evenly in a certain proportion to form a feed material. The feed material is then heated to a certain temperature to make it fluid. Then, it is injected into the mold cavity 4 of the lower mold 105 under high pressure through an injection molding machine. The mold shapes the feed material. After the feed material cools and solidifies in the mold, the upper mold 103 moves away from the lower mold 105. Then, the ejector mechanism 5 is used to eject the molded workpiece from the mold cavity 4 to obtain the molded workpiece.

[0023] It is worth noting that the specific structure and working principle of powder metallurgy injection molds are already known to those in the field, and will not be elaborated on here. For details, please refer to the published technology CN117773121A, a deep cavity powder injection molding product mold and its processing method.

[0024] Please see Figure 2 and Figure 3 The lower mold 105 shown in the figure has four mounting holes 7 on the side near the upper mold 103. The four mounting holes 7 are arranged symmetrically in pairs and are connected to the mounting groove 2. The auxiliary components are set in the four mounting holes 7.

[0025] It should be noted here that mounting hole 7 is used for installing auxiliary components.

[0026] Please see Figures 2-5 The auxiliary components shown in the figure include an auxiliary plate 801 that is slidably connected to the mounting hole 7. The auxiliary plate 801 has a plurality of auxiliary rods 802 arranged in a rectangular array on the side near the molding plate 3. The mounting hole 7 is provided with a driving component for driving each auxiliary rod 802 and a reset component for resetting each auxiliary rod 802 after driving it.

[0027] It should be noted here that: by setting up auxiliary components, under the combined action of drive components, reset components and telescopic components, the reciprocating vibration force is used to make the molded workpiece and the mold surface generate relative movement and slight displacement, thereby reducing the adhesion force between the molded workpiece and the inner wall of the mold cavity 4, making the separation process of the molded workpiece from the mold more stable and gentle, thereby reducing the risk of scratches, wear and other damage to the surface of the molded workpiece, and thus improving the surface quality of the molded workpiece.

[0028] Please see Figures 2-4 The driving assembly shown in the figure includes a driving plate 901 slidably connected to the mounting hole 7. Two sets of symmetrically arranged pushing members are provided on the side of the driving plate 901 away from the auxiliary rod 802. The pushing members include multiple pushing blocks 902 fixedly connected to one side of the driving plate 901. The two opposite side walls of each pushing block 902 are provided with inclined surfaces 903. Two L-shaped plates 904 are fixedly connected to the side of the auxiliary plate 801 near the driving plate 901. The two L-shaped plates 904 are fixedly connected to the side of the driving plate 901 near the driving plate 901. The two driving rods 905 are located between two adjacent pushing blocks 902. The mounting hole 7 is provided with a telescopic assembly for extending and retracting the driving plate 901.

[0029] It should be noted here that the drive components are configured to push each auxiliary lever 802 to move reciprocally.

[0030] Working principle: In the process of using this powder metallurgy injection mold, metal or ceramic powder and organic binder are first mixed evenly in a certain proportion to form a feed material. The feed material is heated to a certain temperature to make it fluid. Then, it is injected into the mold cavity 4 of the lower mold 105 under high pressure through an injection molding machine. The mold shapes the feed material. After the feed material cools and solidifies in the mold, the upper mold 103 moves away from the lower mold 105. Then, the ejector mechanism 5 is used to eject the molded workpiece from the mold cavity 4 to obtain the molded workpiece.

[0031] Furthermore, as the upper mold 103 moves away from the lower mold 105, the elasticity of the telescopic component will push the drive plate 901 out of the mounting hole 7. As the drive plate 901 moves out of the mounting hole 7, it will cause each push block 902 to reciprocate against the drive rod 905. Then, under the reciprocating contact between the inclined surface 903 of the push block 902 and the drive rod 905, and the guiding and resetting action of the reset component, each auxiliary rod 802 on one side of the auxiliary plate 801 will reciprocate against the side wall of the forming plate 3. Thus, under the reciprocating contact of the auxiliary rod 802, a reciprocating vibration force is applied to the forming plate 3. Under the action of the vibration force, the forming workpiece and the mold surface will generate relative movement and slight displacement, thereby reducing the adhesion force between the forming workpiece and the inner wall of the mold cavity 4, making the separation process of the forming workpiece from the mold more stable and gentle, thereby reducing the risk of scratches, wear and other damage to the surface of the forming workpiece, and thus improving the surface quality of the forming workpiece.

[0032] Example 2

[0033] Please see Figure 4 This embodiment further illustrates Example 1. The reset assembly shown in the figure includes a reset tube 1001 fixedly connected to the inner wall of the mounting hole 7 on the side opposite to the molding plate 3. A reset rod 1002 is slidably connected to the reset tube 1001. One end of the reset rod 1002 is connected to the auxiliary plate 801. The other end of the reset rod 1002 is located inside the reset tube 1001 and is fixedly connected to a reset plate 1003. A reset spring 1004 is fixedly connected to the side of the reset plate 1003 away from the reset rod 1002. The other end of the reset spring 1004 is connected to the bottom wall of the reset tube 1001.

[0034] It should be noted here that the reset component is configured to provide guidance and reset for the movement of the auxiliary board 801.

[0035] Example 3

[0036] Please see Figure 4This embodiment further illustrates other embodiments. The telescopic assembly shown in the figure includes a telescopic tube 1101 fixedly connected to the bottom wall of the mounting hole 7. A telescopic rod 1102 is slidably connected to the telescopic tube 1101. One end of the telescopic rod 1102 is connected to the drive plate 901. The other end of the telescopic rod 1102 is located inside the telescopic tube 1101 and is fixedly connected to a telescopic plate 1103. A telescopic spring 1104 is fixedly connected to the side of the telescopic plate 1103 away from the telescopic rod 1102. The other end of the telescopic spring 1104 is connected to the bottom wall of the telescopic tube 1101.

[0037] It should be noted that during the merging of the upper mold 103 and the lower mold 105, the drive plate 901 will be pushed, causing the drive plate 901 to retract into the mounting hole 7. When the upper mold 103 and the lower mold 105 separate, the drive plate 901 will be moved out of the mounting hole 7 under the elastic action of the telescopic component.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A powder metallurgy injection mold, comprising: A panel (101) and a base plate (102), wherein an upper mold (103) and a mold foot (104) are respectively provided on opposite sides of the panel (101) and the base plate (102), and a lower mold (105) is provided on the side of the mold foot (104) near the upper mold (103); characterized in that it further includes: An installation groove (2) is provided on the side of the lower mold (105) near the upper mold (103). The installation groove (2) is connected to a molding plate (3) by bolts. The molding plate (3) has a cavity (4). The lower mold (105) is provided with an auxiliary component for assisting demolding of the molded workpiece in the cavity (4). The lower mold (105) is provided with four guide rods (6) arranged symmetrically in pairs on the side near the upper mold (103). The mold foot (104) is provided with an ejector mechanism (5) for demolding the molded workpiece.

2. The powder metallurgy injection mold according to claim 1, characterized in that: The lower mold (105) has four mounting holes (7) on the side near the upper mold (103). The four mounting holes (7) are arranged symmetrically in pairs and communicate with the mounting groove (2). The auxiliary component is set in the four mounting holes (7).

3. A powder metallurgy injection mold according to claim 2, characterized in that: The auxiliary component includes an auxiliary plate (801) slidably connected to the mounting hole (7). The auxiliary plate (801) has a plurality of auxiliary rods (802) arranged in a rectangular array on the side near the molding plate (3). The mounting hole (7) is provided with a driving component for driving each auxiliary rod (802) and a reset component for resetting each auxiliary rod (802) after driving it.

4. A powder metallurgy injection mold according to claim 3, characterized in that: The drive assembly includes a drive plate (901) slidably connected to the mounting hole (7). Two sets of symmetrically arranged push members are provided on the side of the drive plate (901) away from the auxiliary rod (802). Each push member includes multiple push blocks (902) fixedly connected to one side of the drive plate (901). Each push block (902) has two inclined surfaces (903) on its two opposite sidewalls. Two L-shaped plates (904) are fixedly connected to the side of the auxiliary plate (801) near the drive plate (901). Drive rods (905) are fixedly connected to the side of the two L-shaped plates (904) near the drive plate (901). The two drive rods (905) are located between two adjacent push blocks (902). The mounting hole (7) is provided with a telescopic assembly for extending and retracting the drive plate (901).

5. A powder metallurgy injection mold according to claim 4, characterized in that: The reset assembly includes a reset tube (1001) fixedly connected to the inner wall of the mounting hole (7) on the opposite side of the molding plate (3). The reset tube (1001) is slidably connected to a reset rod (1002). One end of the reset rod (1002) is connected to an auxiliary plate (801). The other end of the reset rod (1002) is located inside the reset tube (1001) and is fixedly connected to a reset plate (1003). A reset spring (1004) is fixedly connected to the side of the reset plate (1003) away from the reset rod (1002). The other end of the reset spring (1004) is connected to the bottom wall of the reset tube (1001).

6. A powder metallurgy injection mold according to claim 5, characterized in that: The telescopic assembly includes a telescopic tube (1101) fixedly connected to the bottom wall of the mounting hole (7). The telescopic tube (1101) is slidably connected to a telescopic rod (1102). One end of the telescopic rod (1102) is connected to the drive plate (901). The other end of the telescopic rod (1102) is located inside the telescopic tube (1101) and is fixedly connected to a telescopic plate (1103). A telescopic spring (1104) is fixedly connected to the side of the telescopic plate (1103) away from the telescopic rod (1102). The other end of the telescopic spring (1104) is connected to the bottom wall of the telescopic tube (1101).

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