Die-casting die for flat plate type thin-walled workpiece

Abstract

The utility model relates to the technical field of die-casting, in particular to a die-casting die for forming a flat plate type thin-wall part in a die-casting mode. In order to improve the die-casting qualified rate of the flat plate type thin-walled workpiece and reduce the production cost, the die-casting die of the flat plate type thin-walled workpiece comprises a feeding piece and a die core, the feeding piece comprises a sprue bush and a sprue spreader, the sprue bush is inserted into a feeding hole in a fixed die block, and the sprue spreader is inserted into a sprue hole in the fixed die block. The sprue spreader is fixed on the movable module and is inserted into the sprue bush; a die cavity and a feeding main runner are arranged in the die core, the die-casting feeding end and the exhaust tail end of the die cavity are located on the two sides of the feeding piece, and the die-casting feeding end of the die cavity is communicated with the feeding piece through the feeding main runner. And the feeding tail end, far away from the feeding part, of the feeding main runner is close to the far side, far away from the feeding part, of the die cavity. According to the die-casting die for the flat plate type thin-walled workpiece, the die-casting qualified rate of the flat plate type thin-walled workpiece formed through die casting can be increased, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to die casting technical field especially relates to a kind of die casting die for die casting formation flat plate class thin-walled part. BACKGROUND

[0002] At present, the feed flow channel of die casting die is usually arranged in the middle of the mold core to quickly fill the mold cavity to form die casting products. However, for flat plate class thin-walled parts such as power cover, since the metal liquid for die casting flows quickly during the filling process, it is easy to directly impact the end of the mold cavity far from the feed port and then backflow, resulting in the power cover formed by die casting being unqualified due to gas vortex, which leads to low qualification rate of the power cover formed by die casting and high production cost. In addition, the backflow of the metal liquid for die casting in the mold cavity can easily cause the die casting die to age faster, further increasing the production cost of die casting products. SUMMARY

[0003] To improve the die casting qualification rate of flat plate class thin-walled parts and reduce production cost, the utility model provides a die casting die for flat plate class thin-walled parts, which includes a feeding member and a mold core. The feeding member includes a sprue bushing and a flow divider cone. The sprue bushing is inserted into a feed hole on the fixed die block, and the flow divider cone is fixed on the movable die block and inserted into the sprue bushing. The mold core is provided with a mold cavity and a main feed flow channel. The die casting feed end and the exhaust tail end of the mold cavity are located on both sides of the feeding member. The die casting feed end of the mold cavity is connected to the feeding member through the main feed flow channel, and the feed tail end of the main feed flow channel away from the feeding member is close to the far side of the mold cavity away from the feeding member. In this way, the main feed flow channel of the die casting die for flat plate class thin-walled parts of the utility model injects die casting metal liquid into the mold cavity from the side of the mold cavity, effectively prolonging the length of the main feed flow channel, thereby reducing the pressure of the die casting metal liquid in the feeding member on the die casting metal liquid injected into the mold cavity under the action of gravity, further reducing the impact on the die casting metal liquid injected into the mold cavity, avoiding the backflow of the die casting metal liquid injected into the mold cavity at the exhaust tail end of the mold cavity away from the main feed flow channel, and thus forming gas vortex on the flat plate class thin-walled part formed by die casting, improving the die casting qualification rate of the flat plate class thin-walled part formed by die casting, and reducing production cost. In addition, the die casting die for flat plate class thin-walled parts of the utility model prolongs the length of the main feed flow channel, which can reduce the flow rate of the die casting metal liquid in the die casting die for flat plate class thin-walled parts of the utility model, thereby slowing down the damage caused by the rapid flow of the die casting metal liquid to the die casting die for flat plate class thin-walled parts of the utility model, delaying the aging speed of the die casting die for flat plate class thin-walled parts of the utility model, and prolonging the service life of the die casting die for flat plate class thin-walled parts of the utility model.

[0004] Preferably, the mold core comprises a movable mold core and a fixed mold core, the movable mold core is provided with a movable mold cavity, the fixed mold core is provided with a fixed mold cavity, and the movable mold cavity and the fixed mold cavity are combined to form the mold cavity when the movable mold core and the fixed mold core are combined; the feeding main flow channel is arranged on the movable mold core. In this way, the feeding main flow channel is arranged on the movable mold core, which facilitates the feeding main flow channel to receive the die casting metal liquid during feeding, avoids the die casting metal liquid overflowing from the feeding main flow channel, and affects the die casting efficiency and effect.

[0005] Preferably, the movable mold core is provided with a limiting column, the limiting column is close to the exhaust tail end of the mold cavity, and the limiting column and the feeding main flow channel are oppositely arranged on both sides of the mold cavity. In this way, the limiting column can be used to block and limit the flat plate type thin-walled part formed by die casting during the die casting process, so as to avoid the flat plate type thin-walled part formed by die casting from being displaced due to the impact of the injected die casting metal liquid, affect the forming effect of the flat plate type thin-walled part formed by die casting, and improve the die casting qualification rate. Further, the limiting column is close to the far side of the mold cavity away from the feeding part. In this way, the limiting column close to the far side of the mold cavity can further improve the limiting effect of the limiting column on the flat plate type thin-walled part formed by die casting. Further preferably, the movable mold core is provided with a limiting through hole, and the limiting column is inserted into the limiting through hole. In this way, the height of the limiting column protruding from the limiting through hole can be adjusted according to the need during the die casting process, that is, the height of the limiting column protruding from the limiting through hole is adjusted according to the shape and thickness of the flat plate type thin-walled part formed by die casting, so as to meet the limiting needs.

[0006] Preferably, the die casting feeding end of the mold cavity is provided with a plurality of die casting feeding ports in communication with the feeding main flow channel. In this way, the die casting metal liquid in the feeding main flow channel can be injected into the mold cavity through the plurality of die casting feeding ports during the die casting process, which can further slow down the flow rate of the die casting metal liquid in the mold cavity, so as to further avoid the backflow of the die casting metal liquid at the exhaust tail end of the mold cavity to form air vortex, improve the die casting quality of the flat plate type thin-walled part formed by die casting, that is, improve the die casting qualification rate.

[0007] Preferably, an overflow trough is provided on the movable mold core, and the overflow trough is close to the exhaust tail end of the mold cavity and is arranged opposite to the main feed channel. In this way, during the die-casting process, the excess portion of the die-casting molten metal injected into the mold cavity can overflow from the mold cavity and flow into the overflow trough to ensure that the injected die-casting molten metal can meet the die-casting needs, avoid the unqualified flat-plate thin-walled parts formed by die-casting due to insufficient injected die-casting molten metal, and improve the die-casting qualification rate. Furthermore, a push rod through hole for inserting a push rod is provided on the movable mold core, and the push rod through hole is connected to the main feed channel or the overflow trough. In this way, when the mold is opened, the push rod inserted in the push rod through hole can be used to eject the die-cast metal block formed by die-casting in the main feed channel and the slag bag formed by the die-casting molten metal in the overflow trough, so as to facilitate the subsequent die-casting of the die-casting mold of the flat-plate thin-walled parts of the utility model and improve the die-casting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Fig. 1 This is a schematic structural diagram of a die-casting mold for a flat-plate thin-walled part of the present invention;

[0009] Fig. 2 This is a structural diagram of the die-casting die for flat-plate thin-walled parts of the utility model when the fixed die plate is removed;

[0010] Fig. 3 This is a structural schematic diagram of the die-casting mold for flat-plate thin-walled parts of the utility model when the fixed mold plate and the fixed mold core are removed. DETAILED DESCRIPTION

[0011] Next, combine Figs. 1 to 3 , the die-casting mold of the flat-plate thin-walled parts of the utility model is described in detail.

[0012] like Figs. 1 to 3 As shown, the die-casting mold for thin-walled flat-plate parts of the present invention includes a feed piece and a mold core. The feed piece comprises a sprue bushing 11 and a diverter cone 12. The sprue bushing 11 is inserted into a feed hole (not shown) on a fixed die block 21. The diverter cone 12 is fixed to a movable die block 22 and inserted into the sprue bushing 11.

[0013] like Figs. 1 to 3As shown, the mold core includes a movable mold core 31 and a fixed mold core 32, the movable mold core 31 is provided with a movable mold cavity (not shown in the figure), the fixed mold core 32 is provided with a fixed mold cavity (not shown in the figure), and the movable mold cavity and the fixed mold cavity are combined to form a mold cavity (not shown in the figure) when the movable mold core 31 and the fixed mold core 32 are combined. The mold core is provided with a feeding main flow channel 311, and the die casting feeding end and the exhaust tail end of the mold cavity are located on both sides of the feeding member. The die casting feeding end of the mold cavity is communicated with the feeding member through the feeding main flow channel 311, and the feeding tail end of the feeding member is away from the feeding main flow channel 311 and close to the far side of the mold cavity away from the feeding member. In this way, the feeding main flow channel 311 of the die casting mold for the flat plate type thin-walled part of the utility model injects the die casting metal liquid into the mold cavity from the side of the mold cavity, effectively prolongs the length of the feeding main flow channel 311, thereby reducing the pressure of the die casting metal liquid in the feeding member on the die casting metal liquid injected into the mold cavity under the action of gravity, and further reducing the impact on the die casting metal liquid injected into the mold cavity, avoiding the backflow of the die casting metal liquid injected into the mold cavity at the exhaust tail end of the mold cavity away from the feeding main flow channel 311, and causing the die casting to form the flat plate type thin-walled part 4 to form air rolls, improving the die casting qualified rate of the die casting formed flat plate type thin-walled part 4, and reducing the production cost. In addition, the die casting mold for the flat plate type thin-walled part of the utility model prolongs the length of the feeding main flow channel 311, which can reduce the flow rate of the die casting metal liquid in the die casting mold for the flat plate type thin-walled part of the utility model, thereby slowing down the damage of the rapid flow of the die casting metal liquid to the die casting mold for the flat plate type thin-walled part of the utility model, delaying the aging speed of the die casting mold for the flat plate type thin-walled part of the utility model, and prolonging the service life of the die casting mold for the flat plate type thin-walled part of the utility model. Preferably, the feeding main flow channel 311 is arranged on the movable mold core 31. In this way, the feeding main flow channel 311 is arranged on the movable mold core 31, which is convenient for the feeding main flow channel 311 to receive the die casting metal liquid during feeding, avoids the overflow of the die casting metal liquid from the feeding main flow channel 311, and affects the die casting efficiency and die casting effect. Preferably, the movable mold core 31 is provided with a limiting column (not shown in the figure), which is close to the exhaust tail end of the mold cavity, and the limiting column and the feeding main flow channel 311 are oppositely arranged on both sides of the mold cavity. In this way, during the die casting process, the limiting column can be used to block and limit the flat plate type thin-walled part 4 formed by die casting, avoid the flat plate type thin-walled part 4 formed by die casting from being displaced due to the impact of the injected die casting metal liquid, affect the forming effect of the flat plate type thin-walled part 4 formed by die casting, and improve the die casting qualified rate. Preferably, the limiting column is close to the far side of the mold cavity away from the feeding member. In this way, the limiting column is close to the far side of the mold cavity, which can further improve the limiting effect of the limiting column on the flat plate type thin-walled part 4 formed by die casting. Preferably, the movable mold core 31 is provided with a limiting through hole 312, and the limiting column is inserted into the limiting through hole 312. In this way, during the die casting process, the height of the limiting column protruding from the limiting through hole 312 can be adjusted as needed, that is, the height of the limiting column protruding from the limiting through hole 312 is adjusted according to the shape and thickness of the flat plate type thin-walled part 4 formed by die casting, and the limiting needs are met.Preferably, the pressure casting feeding end of the mold cavity is provided with a plurality of pressure casting feeding ports 313 in communication with the feeding main flow channel 311. In this way, during the pressure casting process, the pressure casting metal liquid in the feeding main flow channel 311 can be injected into the mold cavity through the plurality of pressure casting feeding ports 313, which can further slow down the flow rate of the pressure casting metal liquid in the mold cavity, thereby further avoiding the backflow of the exhaust tail end of the pressure casting metal liquid in the mold cavity to form air vortex, improving the pressure casting quality of the flat plate type thin-walled part 4 formed by pressure casting, i.e. improving the pressure casting qualified rate. In specific implementation, the number of pressure casting feeding ports 313 can be adjusted as needed, for example, when the flat plate type thin-walled part formed by pressure casting is a power cover, four pressure casting feeding ports 313 can be provided. Preferably, the movable mold core 31 is provided with a flash groove 314, and the flash groove 314 is close to the exhaust tail end of the mold cavity and is arranged opposite to the feeding main flow channel 312. In this way, during the pressure casting process, the excess part of the pressure casting metal liquid injected into the mold cavity can overflow from the mold cavity and flow into the flash groove 314, so as to ensure that the injected pressure casting metal liquid can meet the pressure casting needs, avoid the unqualified flat plate type thin-walled part 4 formed by pressure casting due to the insufficient injection of pressure casting metal liquid, and improve the pressure casting qualified rate. Preferably, the movable mold core 31 is provided with a ejector rod through hole 315 for the plug-in ejector rod (not shown in the figure), and the ejector rod through hole 315 is in communication with the feeding main flow channel 311 or the flash groove 314. In this way, during the mold opening, the pressure casting metal block (not shown in the figure) in the feeding main flow channel 311 and the slag package (not shown in the figure) formed by the pressure casting metal liquid in the flash groove 314 can be ejected by the ejector rod inserted into the ejector rod through hole 315, which facilitates the subsequent pressure casting of the flat plate type thin-walled part 4 of the pressure casting mold of the utility model, and improves the pressure casting efficiency.

Claims

1. A die casting mold for a flat plate thin-walled member, characterized by, The die-casting die comprises a feeding member and a core, the feeding member comprises a sprue bush and a runner cone, the sprue bush is inserted into a feeding hole on a fixed die block, and the runner cone is fixed on a movable die block and inserted into the sprue bush; the core is provided with a cavity and a feeding main runner, the die-casting feeding end and the exhaust tail end of the cavity are located on both sides of the feeding member, the die-casting feeding end of the cavity is communicated with the feeding member through the feeding main runner, and the feeding tail end of the feeding main runner away from the feeding member is close to the far side of the cavity away from the feeding member.

2. The die casting mold for a flat plate thin-walled member according to claim 1, characterized by, The core comprises a movable core and a fixed core, the movable core is provided with a movable cavity, the fixed core is provided with a fixed cavity, and the movable cavity and the fixed cavity are closed to form the cavity when the movable core and the fixed core are closed; the feeding main runner is arranged on the movable core.

3. The die casting mold for a flat plate thin-walled member according to claim 2, characterized in that, The movable core is provided with a limiting column, the limiting column is close to the exhaust tail end of the cavity, and the limiting column and the feeding main runner are oppositely arranged on both sides of the cavity.

4. The die casting mold for a flat plate thin-walled member according to claim 3, characterized by The limiting column is close to the far side of the cavity away from the feeding member.

5. The die casting mold for a flat plate thin-walled member according to claim 4, characterized in that, The movable core is provided with a limiting through hole, and the limiting column is inserted into the limiting through hole.

6. The die casting mold for a flat plate thin wall member according to any one of claims 1 to 5, characterized in that, The die-casting feeding end of the cavity is provided with a plurality of die-casting feeding ports communicated with the feeding main runner.

7. The die casting mold for a flat plate thin wall member according to any one of claims 2 to 5, characterized in that, The movable core is provided with a flash groove, and the flash groove is close to the exhaust tail end of the cavity and oppositely arranged with the feeding main runner.

8. The die casting mold for a flat plate thin wall member according to claim 7, characterized in that, The movable core is provided with a ejector rod through hole for inserting an ejector rod, and the ejector rod through hole is communicated with the feeding main runner or the flash groove.

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