Die-casting die for new energy automobile motor shell

Abstract

The utility model discloses a die-casting die for a motor shell of a new energy automobile, which comprises a fixed die, a sliding block and a sliding block seat, the sliding block is fixed with the sliding block seat, and the die-casting die is characterized in that a locking block is fixedly arranged on one side, facing the sliding block seat, of the fixed die, and a pre-tightening block is fixedly embedded on the lower end face of the fixed die. The locking block is tightly pressed on the outer side face of the sliding block base, and the pre-tightening block abuts against the upper end face of the outer end of the sliding block base. The mold has the advantages that the locking block and the pre-tightening block are fixed on the fixed mold, and when the fixed mold and the movable mold are closed, the locking block and the pre-tightening block are respectively and tightly pressed at different positions of the sliding block seat, so that relatively large locking force is applied to the sliding block seat, and the sliding block and the sliding block seat are well prevented from generating micro-swing due to pressure in a cavity; and the stability of the sliding block in the die-casting and die-closing process is improved, so that the forming quality of a product is improved.

Description

Technical Field

[0001] The utility model relates to a die-casting mold for metal parts, in particular to a die-casting mold for a motor housing of a new energy vehicle. Background Art

[0002] The motor housings of new energy vehicles are basically formed by die-casting. Since the height of the motor housing is relatively high, the core mold for die-casting it is also relatively high, resulting in the slider for core pulling of the motor housing being tall and narrow. During the die-casting process of the mold, the pressure acting on the slider inside the cavity is very large, and there is a gap between the slider seat connected to the slider and the fixed mold, which causes the slider and the slider seat to produce slight swings under the action of the pressure, affecting the forming quality of the motor housing. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a die-casting mold for a motor housing of a new energy vehicle, which can improve the stability of the slider during die-casting to improve the forming quality of the product.

[0004] The technical solution adopted by the utility model to solve the above technical problem is: a die-casting mold for a motor housing of a new energy vehicle, including a fixed mold, a slider and a slider seat. The slider is fixed to the slider seat. A locking block is fixedly arranged on one side of the fixed mold facing the slider seat, and a pre-tightening block is fixedly embedded in the lower end surface of the fixed mold. When the fixed mold is clamped with the moving mold in the mold, the locking block tightly presses on the outer side surface of the slider seat, and the pre-tightening block abuts against the upper end surface of the outer end of the slider seat.

[0005] Further, the locking block is inclined, and the outer side surface of the slider seat is an inclined surface matching the locking block.

[0006] Further, the core mold in the mold is fixedly combined by multiple core mold segments along the axial direction of the motor housing.

[0007] Further, the splicing surface between two adjacent core mold segments is a stepped surface.

[0008] Further, an air extraction channel is arranged in the fixed mold. The air extraction channel is communicated with the cavity. An air extraction pipe is arranged on the outer surface of the fixed mold. One end of the air extraction pipe is connected to the air extraction channel through a joint, and the other end of the air extraction pipe is connected to a vacuum pump.

[0009] Further, a flow splitter is fixedly arranged on the slider seat. A liquid injection port is arranged on the fixed mold. When the fixed mold is clamped with the moving mold, the flow splitter is located in the liquid injection port, and a notch is arranged on the outer side surface of the flow splitter.

[0010] Compared with the prior art, the advantages of the present utility model are that by fixing a locking block and a preloading block on the fixed mold, and when the fixed mold and the movable mold are clamped, the locking block and the preloading block respectively press tightly on different positions of the slider seat, applying a large locking force to the slider seat, and also effectively preventing the slider and the slider seat from generating micro-swing due to the pressure inside the cavity, improving the stability of the slider during the die-casting clamping process, thereby improving the forming quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0012] Figure 2 is a sectional view of the present utility model;

[0013] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0014] Figure 4 is a sectional view of the present utility model in another direction;

[0015] Figure 5 is a three-dimensional structural schematic diagram of the present utility model after removing the fixed mold. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present utility model will be further described in detail below in conjunction with the embodiments of the drawings.

[0017] As Figures 1-5 shown, a die-casting mold for a new energy vehicle motor housing includes a movable mold 1, a fixed mold 2, a slider 3 and a slider seat 4. The slider 3 is fixed to the slider seat 4. A locking block 5 arranged obliquely is fixedly provided on one side of the fixed mold 2 facing the slider seat 4. The outer side surface of the slider seat 4 is an inclined surface 41 matching the locking block 5. A preloading block 6 is fixedly embedded in the lower end surface of the fixed mold 2. When the fixed mold 2 and the movable mold 1 are clamped, the locking block 5 presses tightly on the inclined surface 41 of the slider seat 4, and the preloading block 6 abuts against the upper end surface of the outer end of the slider seat 4. And the core mold in the mold is fixedly composed of multiple core mold segments 7 along the axial direction of the motor housing. Different core mold segments 7 can be made of different materials. Since the core mold segment located at the top of the core mold corresponds to the bearing installation position in the motor housing, the material of this core mold segment can be selected to be better than that of other core mold segments to improve the die-casting quality of the bearing installation position in the motor housing and also prevent sticking to the mold. And the joint surface between two adjacent core mold segments 7 is a stepped surface 71. Since the overall height of the core mold is relatively high, the stability of the core mold during clamping can be improved by joining with the stepped surface 71, reducing the machining precision requirements for the core mold segments 7 and also reducing the burrs of the die-cast finished product, further improving the finished product quality.

[0018] In addition, as Figures 1-3As shown, in order to reduce the local gas in the cavity during die-casting, reduce the gas entrapment phenomenon in the die-cast product, and improve the quality of the die-cast product, an air extraction channel 21 can also be provided in the fixed mold 2. The air extraction channel 21 is communicated with the cavity in the mold. An air extraction pipe 8 is provided on the outer surface of the fixed mold 2. One end of the air extraction pipe 8 is connected to the air extraction channel 21 through a connector 81, and the other end of the air extraction pipe 8 is connected to a vacuum pump (not shown in the figure).

[0019] In addition, as Figures 1-3 shown, a flow splitter cone 9 can also be fixedly provided on the slider seat 4, and a liquid injection port 22 is provided on the fixed mold 2. When the fixed mold 2 is closed with the movable mold 1, the flow splitter cone 9 is located in the liquid injection port 22, and a notch 91 is provided on the outer side surface of the flow splitter cone 9; when the aluminum liquid injection is completed, the aluminum liquid will solidify at the notch 91 to form a bump. When the mold is opened, through the action of the bump, the die-cast product can be smoothly separated from the fixed mold 2.

[0020] The protection scope of the present utility model includes but is not limited to the above embodiments. The protection scope is subject to the claims. Any replacement, deformation, and improvement that are easily conceivable by those skilled in the art to this technology fall within the protection scope of the present utility model.

Claims

1. A die-casting mold for the motor housing of a new energy vehicle, comprising a fixed mold, a slider and a slider seat, wherein the slider is fixed to the slider seat, and is characterized in that: One side of the fixed mold facing the slider seat is fixedly provided with a locking block, and a pre-tightening block is fixedly embedded in the lower end surface of the fixed mold. When the fixed mold is clamped with the moving mold in the mold, the locking block presses tightly against the outer side surface of the slider seat, and the pre-tightening block abuts against the upper end surface of the outer end of the slider seat.

2. The die-casting mold for the motor housing of a new energy vehicle according to claim 1, characterized in that: The locking block is inclined, and the outer side surface of the slider seat is an inclined surface matching the locking block.

3. The die-casting mold for the motor housing of a new energy vehicle according to claim 1, wherein: The core mold in the mold is fixedly combined by a plurality of core mold segments along the axial direction of the motor housing.

4. The die-casting mold for the motor housing of a new energy vehicle according to claim 3, wherein: The joint surface between two adjacent core mold segments is a stepped surface.

5. The die-casting mold for the motor housing of a new energy vehicle according to claim 1, characterized in that: An air extraction channel is arranged in the fixed mold. The air extraction channel is communicated with the cavity. An air extraction pipe is arranged on the outer surface of the fixed mold. One end of the air extraction pipe is connected to the air extraction channel through a connector, and the other end of the air extraction pipe is connected to a vacuum pump.

6. The die-casting mold for the motor housing of a new energy vehicle according to claim 1, characterized in that: A flow dividing cone is fixedly arranged on the slider seat, and a liquid injection port is arranged on the fixed mold. When the fixed mold is clamped with the moving mold, the flow dividing cone is located in the liquid injection port, and a notch is arranged on the outer side surface of the flow dividing cone.

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