Internal cutting die

Abstract

The utility model belongs to the technical field of molds, and particularly relates to an internally-cutting mold which comprises a front mold body and a rear mold body, the front mold body comprises a front mold core, the rear mold body comprises a rear mold core, the rear mold core and the front mold core are combined to form an injection molding cavity, a vertically-arranged flow channel is formed in the front mold core, and a mold cutting mechanism is arranged on the rear mold body. And the die cutting mechanism comprises a fixed frame which is fixedly mounted with the rear die. When the front die and the rear die are closed, the runner can make contact with the top of the die cutting knife and press the die cutting knife, the pressed die cutting knife moves downwards in the fixing frame and extrudes the reset spring, the reset spring has elastic potential energy after being extruded, and after the front die and the rear die are separated, resistance of the runner to the die cutting knife disappears; and under the action of elastic potential energy of the reset spring, the die cutter can move upwards, and then a pouring gate generated in the runner is cut off. The purpose of internally cutting the die is achieved, and the appearance of the produced battery shell is more uniform and attractive.

Description

Technical Field

[0001] The present application belongs to the field of mold technology, and specifically relates to an internal cutting mold. Background Art

[0002] With the rapid development of the mold industry, it is an indispensable key process equipment in industrial production. Practical molds have the advantages of high efficiency and other advantages in mass production of parts. Because they are widely used in various fields, according to different processing technologies, molds can be divided into stamping molds, casting molds, etc. In injection molds, the mold is mainly composed of front and rear molds, gates, runners and other structures. After the front and rear molds are closed, a molding cavity will be formed. The gate is a thin and short runner connecting the cavity and the runner. It is the entrance for the flowing medium to enter the cavity. Therefore, there will be gate residues in the product after injection molding, and qualified products cannot be obtained. Especially in the production process of battery shells, injection molds are particularly important.

[0003] In the patent publication (publication number: CN210082323U), an internal cutting mold is disclosed, which cuts off the gate after the upper mold and the lower mold are separated by setting a cutter to improve the appearance quality of the product. However, the flow channel used in this solution is set horizontally, and after the gate is cut off, there will be casting liquid in the flow channel, which is not conducive to the continuous production. Utility Model Content

[0004] The purpose of the present application is to address the shortcomings of the prior art by providing a cutting die mechanism on the rear mold that can cut the end of the runner gate, thereby solving the problem that when the existing internal cutting mold cuts off the horizontally set runner gate, the casting liquid will remain in the runner, which is not conducive to continuous production.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] An internal cutting mold comprises a front mold and a rear mold, wherein the front mold comprises a front mold core, the rear mold comprises a rear mold core, the rear mold core and the front mold core are combined to form an injection cavity, a vertically arranged flow channel is opened on the front mold core, a die cutting mechanism is arranged on the rear mold, the die cutting mechanism comprises a fixed frame fixedly mounted on the rear mold, a slidably connected die cutting knife is arranged inside the fixed frame, and a reset spring is arranged between the bottom of the die cutting knife and the fixed frame.

[0007] Preferably, the top of the die cutting knife is provided with a channel for liquid to flow through.

[0008] Preferably, a power mechanism is provided between the front mold and the rear mold.

[0009] Preferably, the rear mold includes a moving mechanism, which includes a guide plate fixedly mounted on the rear mold, a moving plate slidably connected to the guide plate, a driving mechanism is provided at the bottom of the moving plate, and a plurality of support rods are provided at the top of the moving plate, the tops of the support rods extend to the interior of the rear mold core and can pass through the injection cavity.

[0010] Preferably, the injection cavities are in two groups and are symmetrically distributed along the flow channel.

[0011] Preferably, the support rods are also divided into two groups, both corresponding to the injection cavity, and the number of the support rods in each group is five.

[0012] Compared with the prior art, the beneficial effects of this application are:

[0013] 1. The present application adopts a cutting die mechanism which is provided on the rear die and can cut the end of the gate of the runner, thereby solving the problem that when the existing internal cutting die cuts the horizontally arranged runner gate, the casting liquid will remain in the runner, which is not conducive to the continuous production.

[0014] 2. In this application, when the front mold and the rear mold are closed, the runner will contact the top of the die cutter and press the die cutter. After being pressed, the die cutter moves downward inside the fixed frame and squeezes the reset spring. The reset spring has elastic potential energy after being squeezed. When the front mold and the rear mold are separated, the resistance of the runner to the die cutter disappears, and the die cutter moves upward under the elastic potential energy of the reset spring, and then cuts off the gate generated in the runner. The purpose of the internal cutting mold is achieved, making the appearance of the produced battery shell more uniform and beautiful.

[0015] 3. After the vertically arranged flow channel in the present application is used, the solution will fall down due to its own gravity and will not remain in the flow channel, thus not affecting the continuous operation of the mold.

[0016] 4. In the present application, after the mold cutting mechanism completes the cutting end of the runner gate, the front mold and the rear mold are separated. At this time, the battery shell formed inside the injection cavity has been injection molded. The driving mechanism can be controlled to drive the movable plate to move upward. The movable plate moves upward to push the support rod to move upward. The support rod passes through the injection cavity to eject the battery shell that has been injection molded inside the injection cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the mold in this application;

[0018] Figure 2 This is a schematic diagram of the internal structure of this application;

[0019] Figure 3 This is a schematic diagram of the connection between the front mold and the rear mold structure in this application;

[0020] Figure 4 It is a schematic diagram of the die cutting mechanism in this application;

[0021] Figure 5 For this application Figure 3 Enlarged schematic diagram at point A in the middle.

[0022] Among them, 10, front mold; 11, front mold core; 12, runner; 20, rear mold; 30, injection cavity; 40, mold cutting mechanism; 41, fixed frame; 42, mold cutting knife; 43, return spring; 50, power mechanism; 60, moving mechanism; 61, guide plate; 62, moving plate; 63, support rod. DETAILED DESCRIPTION

[0023] like Figure 1 As shown, the present application includes a front mold 10 and a rear mold 20, wherein the front mold 10 includes a front mold core 11, and the rear mold 20 includes a rear mold core 21. A flow channel 12 is provided on the front mold core 11, and the flow channel 12 is vertically arranged and extends from the front mold 10 to the front mold core 11, and the rear mold core 21 and the front mold core 11 are combined to form an injection cavity 30. In this embodiment, the injection cavity 30 is constructed by closing the front mold 10 and the rear mold 20, and then the injection molten liquid is introduced through the flow channel 12, and the molten liquid enters the injection cavity 30 through the flow channel 12, and the required battery shell product is formed after cooling.

[0024] like Figure 2-Figure 5 As shown, further, a die cutting mechanism 40 is provided on the rear mold 20, and the die cutting mechanism 40 includes a fixed frame 41 fixedly installed with the rear mold 20, and a slidably connected die cutting knife 42 is provided inside the fixed frame 41, and a return spring 43 is provided between the bottom of the die cutting knife 42 and the fixed frame 41, and the top of the die cutting knife 42 extends to the interior of the rear mold core 21 and passes through the horizontally arranged flow channel 12, and the top of the die cutting knife 42 is provided with a channel for liquid to flow through. In this embodiment, when the front mold 10 and the rear mold 20 are closed, the runner 12 will contact the top of the die cutter 42, pressing the die cutter 42. After being pressed, the die cutter 42 moves downward inside the fixed frame 41 and squeezes the reset spring 43. The reset spring 43 has elastic potential energy after being squeezed. When the front mold 10 and the rear mold 20 are separated, the resistance of the runner 12 to the die cutter 42 disappears, and the die cutter 42 moves upward under the elastic potential energy of the reset spring 43, and then cuts off the gate generated in the runner 12. The purpose of the internal cutting mold is achieved, making the appearance of the produced battery shell more uniform and beautiful.

[0025] In order to make the mold opening and closing more smoothly, a power mechanism 50 is set between the front mold 10 and the rear mold 20. During the operation, the power mechanism 50 can drive the mold to open and close. The power mechanism 50 can be an electric push rod or a hydraulic rod.

[0026] Preferably, the rear mold 20 includes a moving mechanism 60, and the moving mechanism 60 includes a guide plate 61 fixedly mounted on the rear mold 20, a moving plate 62 is slidably connected to the guide plate 61, a driving mechanism is provided at the bottom of the moving plate 62, and a plurality of support rods 63 are provided at the top of the moving plate 62, and the top of the support rod 63 extends to the inside of the rear mold core 21 and can pass through the injection cavity 30. In this embodiment, after the die cutting mechanism 40 completes the cutting end of the gate of the runner 12, the front mold 10 and the rear mold 20 are separated, and the battery shell formed inside the injection cavity 30 has been injection molded at this time, and the driving mechanism can be controlled to drive the moving plate 62 to move upward, and the moving plate 62 moves upward to push the support rod 63 to move upward, and the support rod 63 passes through the injection cavity 30 to eject the battery shell that has been injection molded inside the injection cavity 30.

[0027] On this basis, the injection cavities 30 are divided into two groups, and are symmetrically distributed inside the front mold core 11 and the rear mold core 12 along the flow channel 12, and the support rods 63 are divided into two groups, each corresponding to the injection cavities 30, and the number of the support rods 63 in each group is five, which are evenly distributed at the four corners and the center of the injection cavity 30. In this way, when ejecting the battery shell, it can be ensured that the force of each part of the battery shell is uniform, and there will be no problem of the product being stuck in the injection cavity 30 due to uneven force on a certain part.

Claims

1. An internal cutting mold, comprising a front mold (10) and a rear mold (20), wherein the front mold (10) comprises a front mold core (11), the rear mold (20) comprises a rear mold core (21), the rear mold core (21) and the front mold core (11) are combined to form an injection cavity (30), characterized in that: The front mold core (11) is provided with a vertically arranged flow channel (12), and the rear mold (20) is provided with a mold cutting mechanism (40) capable of cutting the gate of the flow channel (12).

2. The internal cutting die according to claim 1, characterized in that: The die cutting mechanism (40) comprises a fixed frame (41) fixedly mounted on the rear die (20), a slidably connected die cutting knife (42) is arranged inside the fixed frame (41), and a return spring (43) is arranged between the bottom of the die cutting knife (42) and the fixed frame (41).

3. The internal cutting mold according to claim 2, characterized in that: The top of the die cutting knife (42) is provided with a channel for liquid to flow through.

4. The internal cutting die according to claim 1, characterized in that: A power mechanism (50) is arranged between the front mold (10) and the rear mold (20).

5. The internal cutting die according to claim 1, characterized in that: The rear mold (20) includes a moving mechanism (60), and the moving mechanism (60) includes a guide plate (61) fixedly mounted on the rear mold (20), a moving plate (62) slidably connected to the guide plate (61), a driving mechanism being arranged at the bottom of the moving plate (62), and a plurality of support rods (63) being arranged at the top of the moving plate (62), the tops of the support rods (63) extending to the interior of the rear mold core (21) and being capable of passing through the injection cavity (30).

6. The internal cutting die according to claim 1, characterized in that: The injection cavities (30) are in two groups and are symmetrically distributed along the flow channel (12).

7. The internal cutting die according to claim 5, characterized in that: The support rods (63) also consist of two groups, both corresponding to the injection cavity (30).

8. The internal cutting die according to claim 5, characterized in that: The number of the support rods (63) in each group is five.

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