Die-casting die for cover body

Abstract

The utility model relates to the technical field of die-casting dies, and discloses a die-casting die for a cover body, which comprises a fixed die and a movable die movably clamped with the fixed die, a device bin is arranged on the movable die, and an injection molding cavity is formed when the fixed die and the movable die are clamped. The sliding channel is formed in the movable mold and communicates the device bins with the injection molding cavity, and the negative pressure assembly and the piston assembly are arranged on the movable mold. According to the die-casting die for the cover body, by starting the piston assembly, the output end of the pump body communicates with the injection molding cavity, the negative pressure assembly can extract air between the cover piece and the movable die, a negative pressure state is formed, at the moment, due to the fact that the cover piece is adsorbed to the movable die, it is avoided that one part of the cover piece adheres to the movable die, and the other part of the cover piece adheres to the fixed die; and when the cover piece is damaged due to pulling between the movable die and the fixed die, the bending angle of the cover piece is also reduced, deformation or damage of the cover piece is avoided, and the die-casting effect of the cover piece is improved.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, specifically a die-casting mold for a cover. Background Technology

[0002] Die casting molds typically consist of two parts: a fixed mold and a moving mold. The fixed mold is fixed on the fixed mold mounting plate of the die casting machine, and the moving mold is fixed on the moving mold mounting plate of the die casting machine. When the mold is closed, the moving mold and the fixed mold close to form a cavity and a casting system. When die casting a cover, the fixed mold and the moving mold of the required cover shape are usually selected, and then the mold is closed and the casting is performed. Finally, the cover is formed and removed.

[0003] The thickness of the cover varies depending on the actual usage requirements, which leads to some subtle differences in the die-casting method. In particular, for cover parts that are thinner and have poorer toughness, different areas of the cover part may stick to the moving mold and the fixed mold respectively when the moving mold and the fixed mold separate. This will cause a pulling force between the fixed mold and the moving mold when the cover part is demolded. If the bending angle of the cover part is too large, it will cause deformation or damage to the cover part, affecting the die-casting effect of the cover part. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the prior art, this utility model provides a die-casting mold for a cover, which has the advantages of reducing the bending angle of the cover and avoiding deformation or damage to the cover. It solves the problem in the prior art that the bending angle of the cover is too large, which will lead to deformation or damage to the cover.

[0006] Technical solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A die-casting mold for a cover includes a fixed mold and a movable mold that engages with the fixed mold. The movable mold has a device compartment. When the fixed mold and the movable mold are engaged, an injection cavity is formed. The mold is characterized by further comprising: a plurality of sliding channels formed on the movable mold and connecting the device compartment to the injection cavity; a push rod mechanism disposed within the sliding channels and used to push the cover formed in the injection cavity; a negative pressure assembly disposed on the movable mold, used to extract gas from the injection cavity and cause the cover formed in the injection cavity to adhere to the movable mold; and a piston assembly used to control the communication relationship between the negative pressure assembly and the injection cavity.

[0009] Preferably, the top rod mechanism includes a rod with an airtight channel and a vent hole on the side wall of the rod. The rod is slidably connected to the sliding channel. One end of the rod extends into the injection cavity, and the other end of the rod extends into the device compartment. The airtight channel passes through the rod and is connected to the sliding channel through the vent hole.

[0010] Preferably, the sliding channel also includes a threaded portion on the side wall of the end near the device compartment. The push rod mechanism also includes a threaded ring rotatably connected to the side wall of the end near the device compartment, and the threaded ring is threadedly connected to the threaded portion. A torsion member is fixedly connected to the threaded ring.

[0011] Preferably, the device compartment is equipped with a motor, the output end of the motor is connected to a drive gear, and the drive gear is rotatably connected inside the device compartment. The torsion member is connected to a driven gear, and the driven gear is rotatably connected inside the device compartment. The driven gear meshes with the drive gear.

[0012] Preferably, the negative pressure component includes an air guide pipe disposed in the moving mold and a pump body disposed in the installation device chamber. One end of the air guide pipe is connected to the device chamber, and the other end of the air guide pipe is connected to the sliding channel and corresponds to the position of the vent hole.

[0013] Preferably, the piston assembly includes a piston slidably connected in an airtight channel, a connecting rod connected to one end of the piston, and a telescopic rod disposed on a torsion member. The movable end of the telescopic rod is connected to the connecting rod. One end of the piston extends through the airtight channel to the location of the injection molding cavity, and the plane of one end of the piston is coplanar with the plane of one end of the rod located inside the injection molding cavity.

[0014] Preferably, a sealing ring is provided on the rod and the piston respectively.

[0015] Compared with the prior art, the present invention provides a die-casting mold for a cover body, which has the following advantages:

[0016] 1. The cover body uses a die-casting mold. By activating the piston assembly, the output end of the pump body is connected to the injection cavity. The negative pressure assembly will extract the air between the cover and the moving mold and form a negative pressure state. At this time, because the cover is adsorbed on the moving mold, it avoids the situation where part of the cover sticks to the moving mold and the other part sticks to the fixed mold, and the pulling between the moving mold and the fixed mold causes damage to the cover. It also reduces the bending angle of the cover, avoids deformation or damage to the cover, and improves the die-casting effect of the cover.

[0017] 2. The cover is made using a die-casting mold. By adjusting the output mode of the negative pressure component, gas is filled into the area where the cover is adsorbed, changing the negative pressure state. Then, the ejector mechanism is used to remove the cover from the moving mold. At this point, the demolding operation of the cover is completed. The operation is simple and eliminates the need for manual demolding. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 2 For the present utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0020] Figure 3 For the present utility model Figure 1 Enlarged schematic diagram of the structure at point B;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the sliding channel of this utility model;

[0022] Figure 5 This is a partial structural schematic diagram of the present invention;

[0023] Figure 6 This is an exploded view of part of the structure of this utility model.

[0024] The components are: 1. Fixed mold; 2. Moving mold; 3. Device chamber; 4. Injection cavity; 5. Sliding channel; 6. Rod; 7. Airtight channel; 8. Vent hole; 9. Threaded part; 10. Threaded ring; 11. Torsion component; 12. Motor; 13. Drive gear; 14. Driven gear; 15. Air guide pipe; 16. Pump body; 17. Piston; 18. Telescopic rod; 180. Connecting rod; 19. Sealing ring. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-6A die-casting mold for a cover includes a fixed mold 1 and a movable mold 2 that engages with the fixed mold 1. The movable mold 2 has a device compartment 3. When the fixed mold 1 and the movable mold 2 are engaged, an injection cavity 4 is formed. Both the movable mold 2 and the fixed mold 1 are existing technologies and will not be described in detail. The injection cavity 4 is the cavity used for injection die-casting the cover. The internal shape of the injection cavity 4 determines the final shape of the cover. The injection cavity 4 in the figures of this utility model is for demonstration purposes only and is not used as a fixed shape. It is intended to address the problems raised in the background art. Therefore, the die-casting mold also includes: a sliding channel 5 formed on the moving mold 2 and connecting several device chambers 3 and injection cavity 4; an ejector mechanism; a negative pressure assembly set on the moving mold 2; and a piston assembly. Specifically, the ejector mechanism is set in the sliding channel 5 and is used to push the cover formed in the injection cavity 4; the negative pressure assembly is used to extract the gas in the injection cavity 4 and make the cover formed in the injection cavity 4 fit against the moving mold 2; and the piston assembly is used to control the communication relationship between the negative pressure assembly and the injection cavity 4.

[0027] During use, after the moving mold 2 and the fixed mold 1 engage, the injection cavity 4 formed between them is sealed, and the injection cavity 4 is not connected to the sliding channel 5. After the cover is injection molded and is about to be demolded, the piston assembly is activated, connecting the negative pressure assembly to the injection cavity 4. The negative pressure assembly then extracts the air from inside the injection cavity 4, creating a negative pressure state. Because this structure is located on the moving mold 2, and one end of the sliding channel 5 is between the moving mold 2 and the cover, the sliding channel 5 will adhere to the cover due to the negative pressure assembly, and the cover will be temporarily fixed to the moving mold. 2. Because several of these structures are set on the moving mold 2, they can adsorb various positions on the cover. Then, the moving mold 2 is separated from the fixed mold 1 for demolding. At this time, because the cover is adsorbed on the moving mold 2, there will be no situation where part of the cover is stuck to the moving mold 2 and another part is stuck to the fixed mold 1, causing the moving mold 2 and the fixed mold 1 to pull and damage the cover. After the moving mold 2 and the fixed mold 1 are separated by a certain distance, the negative pressure component is activated to reverse the operation, so that the area where the cover is adsorbed is filled with gas, changing the negative pressure state. Then, the ejector mechanism is used to remove the cover from the moving mold 2. At this time, the demolding operation of the cover is completed.

[0028] In this embodiment, the ejector mechanism includes a rod 6 with an airtight channel 7 and a vent hole 8 on the side wall of the rod 6. The rod 6 is slidably connected to the sliding channel 5. One end of the rod 6 extends into the injection cavity 4, and the other end of the rod 6 extends into the device compartment 3. The airtight channel 7 passes through the rod 6 and is connected to the sliding channel 5 through the vent hole 8. In use, when the rod 6 moves toward the injection cavity 4, it will push the cover piece adhering to the moving mold 2, causing it to detach from the moving mold 2, thus assisting in demolding.

[0029] Furthermore, it also includes a threaded portion 9 on the side wall of the sliding channel 5 near the device compartment 3. In order to facilitate the movement of the rod 6, the push rod mechanism also includes a threaded ring 10 rotatably connected to the side wall of the rod 6 near the device compartment 3, and the threaded ring 10 is threadedly connected to the threaded portion 9. A torsion member 11 is fixedly connected to the threaded ring 10. When the torsion member 11 is rotated, the threaded ring 10 will be rotated, and the threaded ring 10 will move axially in the threaded portion 9, which will in turn drive the rod 6 to move axially.

[0030] Furthermore, in order to facilitate the power input to the torsion member 11, a motor 12 is installed in the device compartment 3. The output end of the motor 12 is connected to the drive gear 13, and the drive gear 13 is rotatably connected in the device compartment 3. The torsion member 11 is connected to the driven gear 14, and the driven gear 14 is rotatably connected in the device compartment 3. The driven gear 14 meshes with the drive gear 13. The motor 12 drives the drive gear 13 to rotate, which in turn drives the driven gear 14 meshing with the drive gear 13 to rotate. The driven gear 14 then drives the torsion member 11 to rotate.

[0031] In addition, the piston assembly includes a piston 17 slidably connected in the airtight channel 7, a connecting rod 180 connected to one end of the piston 17, and a telescopic rod 18 provided on the torsion member 11. The movable end of the telescopic rod 18 is connected to the connecting rod 180. One end of the piston 17 extends through the airtight channel 7 to the location of the injection cavity 4. The plane of one end of the piston 17 is coplanar with the plane of one end of the rod 6 located inside the injection cavity 4, ensuring that when the injection cavity 4 is injection molding the cover, one end of the piston 17 and one end of the rod 6 will not affect the die-casting shape of the cover. In use, the telescopic rod 18 drives the piston 17 to move in the direction of the device chamber 3. After the end of the piston 17 close to the injection cavity 4 passes the location of the through hole on the rod, the through hole is connected to the airtight channel 7 and the injection cavity 4.

[0032] Next, after the piston 17 moves, when the through hole connects with the airtight channel 7 and the injection cavity 4, the negative pressure assembly is used. The negative pressure assembly includes an air guide pipe 15 installed in the moving mold 2 and a pump body 16 installed in the mounting device chamber 3. One end of the air guide pipe 15 is connected to the mounting device chamber 3, and the other end of the air guide pipe 15 is connected to the sliding channel 5 and corresponds to the position of the vent hole 8. Therefore, under the action of the pump body 16, its output end can draw out the gas in the injection cavity 4 through the air guide pipe 15 along the already connected through hole, airtight channel 7 and injection cavity 4, so that the cover is adsorbed and the cover is temporarily fixed on the moving mold 2.

[0033] It is worth noting that, in order to ensure that the negative pressure assembly can operate under negative pressure without affecting the relationship between the rod 6 and the sliding channel 5, and between the piston 17 and the airtight channel 7, sealing rings 19 are provided on the rod 6 and at appropriate positions on the piston 17, thereby ensuring airtightness.

[0034] During use, after the moving mold 2 and the fixed mold 1 engage, the injection cavity 4 formed between them is sealed, and the injection cavity 4 is not connected to the sliding channel 5. After the cover is injection molded and is about to be demolded, the piston assembly is activated. The telescopic rod 18 drives the piston 17 to move in the direction of the device chamber 3. After the end of the piston 17 near the injection cavity 4 passes the position of the through hole on the rod, the through hole is connected to the airtight channel 7 and the injection cavity 4. Then, the negative pressure assembly is used. Under the action of the pump body 16, its output end can draw out the gas in the injection cavity 4 through the air guide pipe 15 along the already connected through hole, airtight channel 7 and injection cavity 4, thereby drawing out the air inside the injection cavity 4 and forming a negative pressure state. Because this structure is set on the moving mold 2, and one end of the sliding channel 5 is in the moving mold 2, the negative pressure assembly is activated. Between mold 2 and cover, at this time, one end of sliding channel 5 will be attracted to cover due to the negative pressure component, and cover will be temporarily fixed on moving mold 2. Because several of these structures are set on moving mold 2, they can attract various positions on cover. Then, moving mold 2 and fixed mold 1 are separated and demolded. At this time, because cover is attracted to moving mold 2, there will be no situation where part of cover is stuck to moving mold 2 and another part is stuck to fixed mold 1, and the moving mold 2 and fixed mold 1 are pulled together, causing damage to cover. After moving mold 2 and fixed mold 1 are separated by a certain distance, the negative pressure component is activated, and pump body 16 is reversed to deliver air, remove the negative pressure state, so that the area where cover is attracted is filled with gas, change the negative pressure state, and then use the ejector mechanism to remove cover from moving mold 2. At this time, the demolding operation of cover is completed.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A die-casting mold for a cover body, comprising a fixed mold (1) and a movable mold (2) that is movably engaged with the fixed mold (1), wherein the movable mold (2) has a device compartment (3), and an injection cavity (4) is formed when the fixed mold (1) and the movable mold (2) are engaged, characterized in that: Also includes: A plurality of sliding channels (5) are formed on the moving mold (2) and connect the device compartment (3) and the injection cavity (4); The push rod mechanism is disposed in the sliding channel (5) and is used to push the cover formed in the injection cavity (4); A negative pressure assembly is provided on the moving mold (2), the negative pressure assembly is used to extract the gas in the injection cavity (4) and make the cover formed in the injection cavity (4) fit against the moving mold (2); A piston assembly is used to control the connection between the negative pressure assembly and the injection cavity (4).

2. The die-casting mold for a cover body according to claim 1, characterized in that: The top rod mechanism includes a rod (6) with an airtight channel (7) and a vent hole (8) on the side wall of the rod (6). The rod (6) is slidably connected to the sliding channel (5). One end of the rod (6) extends into the injection cavity (4), and the other end of the rod (6) extends into the device compartment (3). The airtight channel (7) passes through the rod (6), and the airtight channel (7) is connected to the sliding channel (5) through the vent hole (8).

3. The die-casting mold for a cover body according to claim 2, characterized in that: It also includes a threaded portion (9) on the side wall of the sliding channel (5) near the device compartment (3). The push rod mechanism also includes a threaded ring (10) rotatably connected to the side wall of the rod (6) near the device compartment (3), and the threaded ring (10) is threadedly connected to the threaded portion (9). A torsion member (11) is fixedly connected to the threaded ring (10).

4. The die-casting mold for a cover body according to claim 3, characterized in that: The device compartment (3) is equipped with a motor (12), the output end of the motor (12) is connected to a drive gear (13), and the drive gear (13) is rotatably connected inside the device compartment (3). The torsion member (11) is connected to a driven gear (14), and the driven gear (14) is rotatably connected inside the device compartment (3). The driven gear (14) meshes with the drive gear (13).

5. A die-casting mold for a cover body according to claim 2, characterized in that: The negative pressure assembly includes an air guide pipe (15) disposed in the moving mold (2) and a pump body (16) disposed in the installation device chamber (3). One end of the air guide pipe (15) is connected to the device chamber (3), and the other end of the air guide pipe (15) is connected to the sliding channel (5) and corresponds to the position of the vent (8).

6. A die-casting mold for a cover body according to claim 2, characterized in that: The piston assembly includes a piston (17) slidably connected in the airtight channel (7), a connecting rod (180) connected to one end of the piston (17), and a telescopic rod (18) provided on the torsion member (11). The movable end of the telescopic rod (18) is connected to the connecting rod (180). One end of the piston (17) extends through the airtight channel (7) to the location of the injection cavity (4), and the plane of one end of the piston (17) is coplanar with the plane of one end of the rod (6) inside the injection cavity (4).

7. A die-casting mold for a cover body according to claim 6, characterized in that: A sealing ring (19) is provided on the rod (6) and the piston (17).

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