Injection molding tool for molding neodymium iron boron injection molding magnet

Abstract

The invention relates to the technical field of magnet manufacturing, in particular to a neodymium iron boron injection molding magnet forming injection molding tool which comprises a top mold body, a bottom mold body, a cooling auxiliary mechanism and a top mold assembly. A mold core is arranged at the bottom of the top mold main body; a die cavity is formed in the top of the bottom die body, a base is arranged at the bottom end of the bottom die body, butt-joint plate bodies are arranged on the two sides of the base and the two sides of the bottom die body, and the butt-joint plate bodies of the base and the bottom die body are connected and fixed through connecting threaded pins. A cooling auxiliary mechanism is arranged in the bottom die body, and the base is connected with the top die assembly. After the neodymium-iron-boron injection molding magnet is formed, the cooling efficiency is improved and the demolding time is shortened through the cooling auxiliary mechanism arranged in the injection molding tool, and the positive effect on improving the machining benefit is achieved; the mold ejecting assembly is arranged, so that convenience is provided for demolding operation; and moreover, the top die assembly and the cooling auxiliary mechanism have a matching effect through the arranged connecting assembly, so that the overall processing benefit is improved.

Description

Technical Field

[0001] The invention relates to the technical field of magnet manufacturing, in particular to an injection molding tool for forming a neodymium iron boron injection molding magnet. Background Art

[0002] The document with the announcement number CN110931236A disclosed an injection molding anisotropic bonded NdFeB magnetic tile radiation orientation molding device. The processing process of the scheme is to install the injection mold in the injection molding equipment; add the anisotropic NdFeB granules that have been granulated into the injection molding machine barrel; the injection molding machine sets the appropriate injection molding temperature and injection molding pressure, speed, and time, wherein the injection molding temperature of the NdFeB + PA series anisotropic granules is preferably 240 to 270°C, and the injection molding temperature of the NdFeB + PPS series anisotropic granules is preferably 240 to 270°C. The injection molding temperature is preferably 285 to 330°C, wherein the injection molding pressure, speed and time are appropriately adjusted according to the product specifications and dimensions, and the adjustment principle is that the product is fully injected without abnormal burrs or flashing; the injection molding machine is turned on, and the molten pellets are injected into the above-mentioned orientation device under the action of the screw material storage and injection, specifically, the molten pellets enter the inner mold core of the magnetic flow channel and enter the mold cavity along the direction of the arrow. At the same time, the molten pellet magnetic powder completes the orientation rotation under the action of the magnetic field in the orientation device, and finally completes the orientation molding under the injection and holding pressure.

[0003] After the injection molding is completed, the existing injection mold needs to be cooled naturally before the material can be demolded and removed. During this process, the existing bottom mold lacks a suitable auxiliary mechanism to meet the needs of rapid cooling and auxiliary demolding, which has a negative impact on the overall processing efficiency.

[0004] To this end, the present invention proposes an NdFeB injection molding tooling for molding a NdFeB injection molding magnet to solve the above-mentioned problem. Summary of the invention

[0005] The purpose of the present invention is to provide a NdFeB injection molding tooling for molding a NdFeB injection magnet to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: an injection molding tool for forming a NdFeB injection magnet, comprising a top mold body, a bottom mold body, a cooling auxiliary mechanism and a top mold assembly; A mold core is provided at the bottom of the top mold body; A mold cavity is arranged on the top of the bottom mold body, a base is arranged on the bottom end of the bottom mold body, and docking plates are arranged on both sides of the base and the bottom mold body, and the docking plates of the two are connected and fixed by connecting threaded pins; A cooling auxiliary mechanism is arranged in the bottom mold body, and the base is connected to the top mold assembly.

[0007] Preferably, the cooling auxiliary mechanism includes a water inlet, a connecting pipe body, a control valve, a water hose, a water outlet and an auxiliary component; the water inlet is arranged on one side of the bottom mold body, and a water outlet is arranged on the other side of the bottom mold body, and both the water outlet and the water inlet are connected to the connecting pipe body, a control valve is arranged on the connecting pipe body, and a water hose is arranged at one end of the connecting pipe body, and both the water inlet and the water outlet are connected to the auxiliary component.

[0008] Preferably, the auxiliary components include a connecting main pipe, a connecting branch pipe, a diversion pipe and a cooling surround pipe; one end of the connecting main pipe is connected to the water inlet, and the other end of the connecting main pipe is connected to the water outlet.

[0009] Preferably, connecting branch pipes are equidistantly arranged on the connecting main pipe, and diversion pipes are arranged on both sides of the connecting branch pipes, and a cooling surround pipe is arranged at the other end of the diversion pipe, and the cooling surround pipe is arranged on the side wall of the mold cavity; the connecting branch pipes are arranged in the same number of groups as the mold cavity.

[0010] Preferably, the top mold assembly includes an auxiliary punch, a connecting ring body, an auxiliary spring, a accommodating groove body, a mounting slot, an auxiliary shaft rod, a driving groove body, a connecting shaft body, a bearing block body, a mounting card plate, an auxiliary bearing and a handle; the auxiliary punch is plug-inly arranged at the bottom end of the mold cavity, and one end of the auxiliary punch extends into the inner cavity of the mold cavity, and the other end of the auxiliary punch extends to the outside of the bottom end of the mold cavity, and the outer side wall of the auxiliary punch is fixedly provided with a connecting ring body, and an auxiliary spring is fixedly provided on one side of the connecting ring body, and the other end of the auxiliary spring is fixedly provided on the outer side wall of the bottom end of the mold cavity.

[0011] Preferably, the bottom end surface of the auxiliary head is set to a spherical surface; the accommodating groove body is arranged on the base, and a mounting slot is arranged in a notch at one end of the accommodating groove body, and a driving groove body is equidistantly arranged on the auxiliary shaft rod, and a connecting shaft body is fixedly arranged at one end of the auxiliary shaft rod, and one end of the connecting shaft body is connected to an auxiliary bearing, and the auxiliary bearing is embedded in the load-bearing block body, and mounting clamps are symmetrically fixed on both sides of the load-bearing block body, and the mounting clamps are clamped in the mounting slots and fixed by screws, and the handle is fixedly arranged at one end of the connecting shaft body.

[0012] Preferably, the driving groove body is configured as an arc-shaped inclined groove, and the driving groove body and the auxiliary plug are configured at corresponding positions and have the same number of groups.

[0013] Preferably, the auxiliary mandrel is hollow, and the auxiliary mandrel is connected to the connecting branch pipe via a connecting assembly.

[0014] Preferably, the connecting assembly includes a connecting head and a connecting hose, the connecting head is arranged on the connecting branch pipe, and a connecting head is also arranged on the side wall of the auxiliary mandrel, the connecting head is connected to the connecting branch pipe, and the connecting head is connected to the auxiliary mandrel, and the two ends of the connecting hose are respectively connected to the connecting heads on the auxiliary mandrel and the connecting branch pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The NdFeB injection magnet molding injection molding tooling designed by the present invention improves the cooling efficiency and reduces the demolding time through the cooling auxiliary mechanism arranged in the injection molding tooling after the NdFeB injection magnet is molded, which has a positive effect on improving the processing efficiency; the arranged top mold assembly provides convenience for the demolding operation; furthermore, the top mold assembly and the cooling auxiliary mechanism have a coordinated effect through the arranged connecting assembly, thereby improving the overall processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a top view of the injection molding tooling structure connection of the present invention; Figure 2 For the present invention Figure 1 A magnified schematic diagram of the structural connection at center A; Figure 3 This is a bottom view of the injection molding tooling structure connection of the present invention; Figure 4 This is a schematic diagram of the rear side of the injection molding tooling structure of the present invention; Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structural connection at B in the middle; Figure 6 It is a bottom view of the connection structure between the bottom mold body, the cooling auxiliary mechanism, and the top mold assembly of the present invention; Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structural connection at C in the middle; Figure 8 This is a schematic diagram of the connection of the bottom mold main structure of the present invention; Fig. 9 This is a schematic diagram of the structural connection of the cooling auxiliary mechanism of the present invention; Fig.10 For the present invention Fig. 9 The enlarged schematic diagram of the structural connection at D in the middle; Fig.11 It is a top view of the connection structure between the bottom mold body, the cooling auxiliary mechanism, and the top mold assembly of the present invention; Fig.12 For the present invention Fig.11 The enlarged schematic diagram of the structural connection at E in the middle; Fig.13 For the present invention Fig.11Enlarged schematic diagram of the structural connection at point F in the middle.

[0017] In the figure: top mold body 4, mold core 41, bottom mold body 5, base 51, mold cavity 52, docking plate body 53, connecting threaded pin 54, water inlet 601, connecting pipe body 602, control valve 603, water hose 604, water outlet 605, connecting main pipe 701, connecting branch pipe 702, diversion pipe fitting 703, cooling surround pipe 704, connector 801, connecting hose 802, auxiliary top head 901, connecting ring body 902, auxiliary spring 903, accommodating groove body 904, mounting slot 905, auxiliary shaft rod 906, driving groove body 907, connecting shaft body 908, bearing block body 909, mounting card plate 910, auxiliary bearing 911, handle 912. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. The embodiments of the present invention and all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figure 1-Figure 13 , an injection molding tool for forming a neodymium iron boron injection magnet, wherein the injection molding tool comprises a top mold body 4, a bottom mold body 5, a cooling auxiliary mechanism and a top mold assembly; wherein a mold core 41 is arranged at the bottom of the top mold body 4; a mold cavity 52 is arranged at the top of the bottom mold body 5, a base 51 is arranged at the bottom end of the bottom mold body 5, and docking plates 53 are arranged on both sides of the base 51 and the bottom mold body 5, and the docking plates 53 of the two are connected and fixed by connecting threaded pins 54; a cooling auxiliary mechanism is arranged in the bottom mold body 5, and the base 51 is connected and arranged with the top mold assembly.

[0020] The cooling auxiliary mechanism here includes a water inlet 601, a connecting pipe body 602, a control valve 603, a water hose 604, a water outlet 605 and an auxiliary component; the water inlet 601 is arranged on one side of the bottom mold body 5, and the other side of the bottom mold body 5 is provided with a water outlet 605, and the water outlet 605 and the water inlet 601 are both connected to the connecting pipe body 602, the connecting pipe body 602 is provided with a control valve 603, and one end of the connecting pipe body 602 is provided with a water hose 604, and the water inlet 601 and the water outlet 605 are both connected to the auxiliary component; the auxiliary component here The parts include a connecting main pipe 701, a connecting branch pipe 702, a diverter pipe 703 and a cooling surround pipe 704; one end of the connecting main pipe 701 is connected to the water inlet 601, and the other end of the connecting main pipe 701 is connected to the water outlet 605; the connecting main pipe 701 is equidistantly provided with connecting branch pipes 702, and diverter pipes 703 are provided on both sides of the connecting branch pipes 702, and the other end of the diverter pipe 703 is provided with a cooling surround pipe 704, and the cooling surround pipe 704 is surrounded and arranged on the side wall of the mold cavity 52; the connecting branch pipes 702 and the mold cavity 52 are arranged in the same number of groups.

[0021] After the NdFeB injection-molded magnet is injection-molded by the top mold body 4 and the bottom mold body 5, the control valve 603 at the water inlet 601 and the water outlet 605 at both ends of the top mold body 4 is started, and the cooling water enters from the water inlet 601, then passes through the connecting main pipe 701, and finally flows out from the water outlet 605. This process provides a flow cooling; and in the process of the cooling water passing through the connecting main pipe 701, the cooling water enters the diversion pipe 703 through the connecting branch pipe 702, and then enters the cooling surround pipe 704, so as to cool the side wall of the mold cavity 52, and then cool the molded product. Compared with natural cooling, it has excellent cooling efficiency and shortens its cooling time. After the molded product is cooled, the flow of cooling water is closed by the control valve 603.

[0022] The bottom mold body 5 and the base 51 provided in this embodiment are detachably provided, and the two are connected and fixed by the cooperation of the docking plate 53 and the connecting threaded pin 54; this is for the purpose of facilitating the maintenance and repair of the cooling auxiliary mechanism in the bottom mold body 5 and the top mold assembly on the base 51, so that they can operate stably and normally.

[0023] Example 2: Based on Example 2, please refer to Figure 7-Figure 13The top mold assembly here includes an auxiliary top head 901, a connecting ring body 902, an auxiliary spring 903, a receiving groove body 904, a mounting slot 905, an auxiliary shaft rod 906, a driving groove body 907, a connecting shaft body 908, a bearing block body 909, a mounting card plate 910, an auxiliary bearing 911 and a handle 912; the auxiliary top head 901 is plugged and arranged at the bottom end of the mold cavity 52, and one end of the auxiliary top head 901 extends into the inner cavity of the mold cavity 52, and the other end of the auxiliary top head 901 extends to the outside of the bottom end of the mold cavity 52, and the outer side wall of the auxiliary top head 901 is fixedly provided with a connecting ring body 902, and an auxiliary spring 903 is fixedly provided on one side of the connecting ring body 902, and the other end of the auxiliary spring 903 is fixedly provided on the outer side wall of the bottom end of the mold cavity 52; the bottom end surface of the auxiliary top head 901 here is arranged as a spherical surface; the receiving groove body 904 is arranged on the base 51, A mounting slot 905 is provided at a slot at one end of the accommodating slot body 904, and a driving slot body 907 is equidistantly provided on the auxiliary shaft rod 906, and a connecting shaft body 908 is fixedly provided at one end of the auxiliary shaft rod 906, and one end of the connecting shaft body 908 is connected to an auxiliary bearing 911, and the auxiliary bearing 911 is embedded in the bearing block body 909, and mounting clamps 910 are symmetrically fixed on both sides of the bearing block body 909, and the mounting clamps 910 are stuck in the mounting slot 905 and fixed by screws, and a handle 912 is fixed at one end of the connecting shaft body 908; the driving slot body 907 here is set as an arc-shaped inclined slot, and the driving slot body 907 corresponds to the setting position of the auxiliary head 901 and has the same number of settings; the auxiliary head 901 here is set to be hollow, and the auxiliary head 901 is connected to the connecting branch pipe 702 through a set connecting component.

[0024] In this embodiment, when the molded product needs to be taken out, the handle 912 is used to drive the rotation of the connecting shaft 908, thereby driving the rotation of the auxiliary shaft rod 906. During the rotation of the auxiliary shaft rod 906, the driving groove body 907 arranged on the auxiliary shaft rod 906 pushes the bottom end of the auxiliary head 901, so that the top end of the auxiliary head 901 pushes the product upward, providing convenience for the demoulding and removal of the product. The purpose of setting the bottom end of the auxiliary head 901 as a spherical surface is to facilitate the pushing work of the driving groove body 907 on the auxiliary head 901; after the pushing and demoulding work is completed, the handle 912 is rotated in the opposite direction, so that the driving groove body 907 pushes and contacts the auxiliary head 901, so that the auxiliary shaft rod 906 returns to the initial position, and then the auxiliary head 901 is reset under the action of the auxiliary spring 903.

[0025] Furthermore, the auxiliary shaft rod 906 is arranged in the accommodating groove body 904, and the bottom mold body 5 and the base 51 are detachably arranged, and the supporting block 909 is positioned by the clamping connection between the mounting clamp plate 910 and the mounting groove 905; this makes the subsequent maintenance or replacement of the auxiliary shaft rod 906 more convenient.

[0026] The connecting assembly includes a connecting head 801 and a connecting hose 802. The connecting head 801 is arranged on the connecting branch pipe 702, and a connecting head 801 is also arranged on the side wall of the auxiliary mandrel 901. The connecting head 801 is connected to the connecting branch pipe 702, and the connecting head 801 is connected to the auxiliary mandrel 901. Both ends of the connecting hose 802 are connected to the connecting heads 801 on the auxiliary mandrel 901 and the connecting branch pipe 702, respectively.

[0027] The auxiliary plug 901 is connected to the connecting branch pipe 702 by a connecting hose 802, which can promptly transport cooling water from the connecting branch pipe 702 to the auxiliary plug 901. The auxiliary plug 901 here is set to be hollow, which contains corresponding cooling water, and the auxiliary plug 901 is inserted through the bottom end of the mold cavity 52, and the top end of the auxiliary plug 901 extends into the mold cavity 52. ​​While pushing and assisting demolding of the molded product, it can also provide a corresponding cooling auxiliary effect.

[0028] 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 NdFeB injection molding tool for molding a NdFeB injection magnet, characterized in that: It comprises a top mold body (4), a bottom mold body (5), a cooling auxiliary mechanism and a top mold assembly; A mold core (41) is provided at the bottom of the top mold body (4); A mold cavity (52) is provided at the top of the bottom mold body (5), a base (51) is provided at the bottom end of the bottom mold body (5), and docking plates (53) are provided on both sides of the base (51) and the bottom mold body (5), and the docking plates (53) of the two are connected and fixed by connecting threaded pins (54); A cooling auxiliary mechanism is provided in the bottom mold body (5), and the base (51) is connected to the top mold assembly.

2. The NdFeB injection molding tooling according to claim 1, characterized in that: The cooling auxiliary mechanism comprises a water inlet (601), a connecting pipe body (602), a control valve (603), a water delivery hose (604), a water outlet (605) and an auxiliary component; the water inlet (601) is arranged on one side of the bottom mold body (5), and the water outlet (605) is arranged on the other side of the bottom mold body (5); the water outlet (605) and the water inlet (601) are both connected to the connecting pipe body (602); the connecting pipe body (602) is provided with a control valve (603), and one end of the connecting pipe body (602) is provided with a water delivery hose (604); the water inlet (601) and the water outlet (605) are both connected to the auxiliary component.

3. The NdFeB injection molding tooling according to claim 1, characterized in that: The auxiliary components include a connecting main pipe (701), a connecting branch pipe (702), a flow diversion pipe (703) and a cooling surround pipe (704); one end of the connecting main pipe (701) is connected to the water inlet (601), and the other end of the connecting main pipe (701) is connected to the water outlet (605).

4. The NdFeB injection molding tooling according to claim 2, characterized in that: The connecting main pipe (701) is provided with connecting branch pipes (702) at equal intervals, and flow diversion pipes (703) are provided on both sides of the connecting branch pipes (702). A cooling surround pipe (704) is provided at the other end of the flow diversion pipe (703), and the cooling surround pipe (704) is arranged on the side wall of the mold cavity (52); the connecting branch pipes (702) and the mold cavity (52) are arranged in the same number of groups.

5. The NdFeB injection molding tooling according to claim 1, characterized in that: The top mold assembly comprises an auxiliary ejector head (901), a connecting ring body (902), an auxiliary spring (903), a containing groove body (904), a mounting slot (905), an auxiliary shaft rod (906), a driving groove body (907), a connecting shaft body (908), a bearing block body (909), a mounting card plate (910), an auxiliary bearing (911) and a handle (912); the auxiliary ejector head (901) is plugged and arranged at the bottom end of the mold cavity (52), and one end of the auxiliary ejector head (901) extends into the inner cavity of the mold cavity (52), and the other end of the auxiliary ejector head (901) extends to the outside of the bottom end of the mold cavity (52); the outer side wall of the auxiliary ejector head (901) is fixedly arranged with a connecting ring body (902), one side of the connecting ring body (902) is fixedly arranged with an auxiliary spring (903), and the other end of the auxiliary spring (903) is fixedly arranged on the outer side wall of the bottom end of the mold cavity (52).

6. The NdFeB injection molding tooling according to claim 5, characterized in that: The bottom end surface of the auxiliary top head (901) is arranged as a spherical surface; the accommodating groove body (904) is arranged on the base (51); a notch at one end of the accommodating groove body (904) is provided with a mounting slot (905); a driving groove body (907) is equidistantly arranged on the auxiliary shaft rod (906); a connecting shaft body (908) is fixedly arranged at one end of the auxiliary shaft rod (906); one end of the connecting shaft body (908) is connected to an auxiliary bearing (911); the auxiliary bearing (911) is embedded in the bearing block body (909); mounting clamps (910) are symmetrically fixedly arranged on both sides of the bearing block body (909); the mounting clamps (910) are clamped in the mounting slot (905) and fixed by screws; the handle (912) is fixedly arranged at one end of the connecting shaft body (908).

7. The NdFeB injection molding tooling according to claim 6, characterized in that: The driving groove body (907) is configured as an arc-shaped inclined groove, and the driving groove body (907) and the auxiliary plug (901) are configured at corresponding positions and have the same number of groups.

8. The NdFeB injection molding tooling according to claim 6, characterized in that: The auxiliary plug (901) is configured to be hollow, and the auxiliary plug (901) is connected to the connecting branch pipe (702) via a connecting assembly.

9. The NdFeB injection molding tooling according to claim 8, characterized in that: The connection assembly comprises a connection head (801) and a connection hose (802); the connection head (801) is arranged on the connection branch pipe (702); a connection head (801) is also arranged on the side wall of the auxiliary mandrel (901); the connection head (801) is connected to the connection branch pipe (702); the connection head (801) is connected to the auxiliary mandrel (901); and both ends of the connection hose (802) are connected to the connection heads (801) on the auxiliary mandrel (901) and the connection branch pipe (702), respectively.

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