Die-casting forming die

Abstract

The die-casting forming die comprises a fixed die assembly, a movable die assembly and a product cavity, a fixed die cavity block and a movable die cavity block are arranged in the fixed die assembly and the movable die assembly respectively, the fixed die cavity block and the movable die cavity block are mutually spliced to form an inner cavity with an opening in one side, a sliding block is arranged on one side of the movable die assembly, the sliding block slides into the inner cavity through the opening, and the product cavity is formed in the product cavity. The sliding block, the fixed mold cavity block and the movable mold cavity block enclose to form a product cavity, and a runner for feeding is arranged on one side, close to the sliding block, of the bottom surface of the movable mold cavity block. According to the utility model, the runner is positioned on the inner side of the product cavity and is not directly connected with the peripheral cylindrical surface of the product cavity, so that the cylindrical surface is slightly influenced by temperature and pressure, the service life is prolonged, and the appearance quality and the yield of workpieces are favorably improved. The runner is close to the opening of the housing part, is generally a small surface or a non-main visual surface, and is easy to shape, so that the grinding difficulty can be reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a mould, in particular to a die-casting mould. Background Art

[0002] Die casting is a process of melting solid metal into liquid and then injecting it into a mold under pressure, and obtaining the workpiece after pressurization, pressure holding, cooling, and removal. When processing shell castings, the material is generally fed into the cylindrical surface of the shell, and the liquid is diverted here to complete the casting of other surfaces connected to the cylindrical surface. For example, the patent with publication number CN 116652152 A discloses a die-casting mold for a radiator shell. This method is easy to feed, but because the feed port is directly connected to the die-casting machine, the feed port is located in a high temperature and high pressure area. After long-term operation, the film separation surface is prone to cracks and local corrosion, which affects the life of the mold cylindrical surface and the appearance of the workpiece. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide a die-casting mold with a prolonged service life.

[0004] Technical solution: The die-casting mold described in the utility model includes a fixed mold assembly, a movable mold assembly and a product cavity. The fixed mold assembly and the movable mold assembly are respectively provided with a fixed mold cavity block and a movable mold cavity block. The fixed mold cavity block and the movable mold cavity block are spliced ​​together to form an inner cavity with an opening on one side. A slider is provided on one side of the movable mold assembly. The slider slides into the inner cavity from the opening and encloses the fixed mold cavity block and the movable mold cavity block to form a product cavity. A flow channel for feeding is provided on the side of the bottom surface of the movable mold cavity block close to the slider. With reference to the sliding direction of the slider, the main feed channel is generally provided on the front side of the slider, that is, connected to the cylindrical surface of the shell-like product. The slurry enters the top and bottom connected to the cylindrical surface respectively, so that the shell-like product is formed. This method helps to shorten the length of the slurry path. However, the slurry introduced into the main feed channel is in a high temperature and high pressure state, and the inner wall of the product cavity directly connected to the main feed channel is prone to microcracks / cracks, which in turn affects the appearance of the product.

[0005] In the utility model, the feed flow channel is moved to the opening of the cover shell part, which is located on the inner side of the product cavity and is not directly connected to the cylindrical surface of the product cavity. The cylindrical surface is less affected by temperature and pressure, which extends the service life of the mold and helps to improve the appearance quality and yield rate of the workpiece. In addition, this place is close to the opening of the cover shell part, which is generally a small face or a non-visual face, and is easy to shape, which can reduce the difficulty of grinding, reduce the workload, and improve production efficiency.

[0006] Preferably, a transfer port for converting the flow direction of the liquid is provided on the movable mold assembly at a position corresponding to the fixed mold assembly, and the flow channel is connected to the main feed channel through the transfer port. The molten metal first enters a near-plane side cavity of the product cavity through the feed channel, then enters the cylinder and the other near-plane side cavity in turn, forming the bottom, arc-shaped cylinder and top of the cover shell in turn.

[0007] Preferably, the auxiliary flow channel is in a comb-tooth shape, and the liquid material extends in multiple directions through the auxiliary flow channel, which is convenient for molding.

[0008] Preferably, the movable mold cavity block is provided with a discharge channel connected to the product cavity. During molding, the excess material is discharged through the discharge channel.

[0009] Preferably, when the slider slides, the side walls of the fixed mold cavity block, the movable mold cavity block and the slider that are close to each other are arc-shaped walls, and the discharge channel is close to the arc-shaped side wall of the movable mold cavity block, and the arc-shaped wall is used to form an arc-shaped cylindrical surface of a cover-type product.

[0010] Preferably, the discharge channel includes an exhaust channel and a slag bag area.

[0011] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. Extending the service life of the mold: the feed port is located on the side away from the cylindrical surface of the product cavity to avoid direct contact between the cylindrical surface and the high-temperature and high-pressure liquid, which helps to extend the service life; 2. Reduces the difficulty of shaping and grinding; 3. Suitable for processing cover products with curved cylindrical surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a three-dimensional structural diagram of the casting and pressing mold of the utility model;

[0013] Figure 2 It is a top view of the casting die of the utility model;

[0014] Figure 3 for Figure 2 Middle BB section view;

[0015] Figure 4 for Figure 2 Middle AA section view;

[0016] Figure 5 It is a three-dimensional diagram of the structure of the casting die part of the utility model. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0018] like Figures 1 to 4As shown, it is an overall structural diagram of a die-casting mold disclosed in the utility model. The die-casting mold is mainly composed of a fixed mold assembly 1 and a movable mold assembly 2 stacked up and down. A fixed mold cavity block 11 (omitted in the figure) is clamped in the fixed mold assembly 1, and a movable mold cavity block 21 is clamped in the movable mold assembly 2. The fixed mold cavity block 11 and the movable mold cavity block 21 are pressed against each other and spliced ​​to form an inner cavity with an opening on one side. A sliding assembly 3 is connected to the side of the movable mold assembly 2, and at least one slider 31 is provided at the end close to the movable mold assembly 2, which can slide into the inner cavity along the inner cavity opening. The slider 31, the fixed mold cavity block and the movable mold cavity block together form a product cavity. The product cavity is used to form a cover shell. The side walls of the fixed mold block 11, the movable mold cavity block 21 and the slider 31 that are close to each other are arc-shaped side walls, which are used to enclose and form an arc-shaped cylindrical cavity of the cover shell, and the slider 31 is used to form the opening of the cover shell. Figure 5 As shown, the bottom surface of the movable mold cavity block 21 is provided with a flow channel 23, and the flow channel 23 is used to introduce the molten metal liquid into the product cavity. The fixed mold assembly 1 is provided with a main feed channel 12 for connecting with the die-casting machine. The main feed channel 21 is a vertical channel, which is arranged around the slider 31. The movable mold assembly 2 and the fixed mold assembly are provided with a transfer port 22 at corresponding positions. The flow channel 23 is connected with the main feed channel 12 through the transfer port 22, and then connected with the die-casting machine. In the prior art, the main feed channel is close to the curved side wall of the movable mold cavity block 21. After the mold is used for a long time, micro cracks may appear on the inner wall because the cavity temperature closest to the main feed channel 12 is the highest. The feeding method of the utility model avoids the curved surface of the fixed mold cavity block 11 or the movable mold cavity block 21 being directly connected to the main feed channel, which can extend the service life of the mold. The flow channel 23 is arranged at the opening of the cover shell, which also reduces the difficulty of part grinding and shaping. The auxiliary flow channel 23 is comb-shaped to achieve multi-directional feeding. The molten metal liquid enters the bottom cavity, arc-shaped side cavity and top cavity of the product cavity through the auxiliary flow channel 23 in sequence to form the cover product. The movable mold cavity block 21 is provided with a discharge channel 211 for discharging excess material. Each discharge channel includes an exhaust channel and a slag bag area. The discharge channel 211 is arranged on one side close to the arc-shaped inner wall of the movable mold cavity block.

Claims

1. A die-casting mold, comprising a fixed mold assembly (1) and a movable mold assembly (2), characterized in that: The fixed mold assembly (1) and the movable mold assembly (2) are respectively provided with a fixed mold cavity block (11) and a movable mold cavity block (21). The fixed mold cavity block (11) and the movable mold cavity block (21) are spliced ​​together to form an inner cavity with an opening on one side. A slider (31) is provided on one side of the movable mold assembly (2). The slider (31) slides into the inner cavity from the opening and encloses the fixed mold cavity block (11) and the movable mold cavity block (21) to form a product cavity. A flow channel (23) for feeding is provided on the bottom surface of the movable mold cavity block (21) near the slider (31).

2. The die casting mold according to claim 1, characterized in that: The fixed die assembly (1) is also provided with a main feed channel (12) for connecting the flow channel (23) and the casting press, and the main feed channel (12) is arranged around the slider (31).

3. The die casting mold according to claim 2, characterized in that: A transfer interface (22) for converting the flow direction of the liquid is provided at corresponding positions of the movable mold assembly (2) and the fixed mold assembly (1), and the flow channel (23) is connected to the main feed channel (12) via the transfer interface (22).

4. The die-casting mold according to claim 1, characterized in that: The flow channel (23) is in the shape of comb teeth.

5. The die-casting mold according to claim 1, characterized in that: The movable mold cavity block (21) is provided with a discharge channel (211) which is in communication with the product cavity.

6. The die-casting mold according to claim 5, characterized in that: The side walls of the fixed mold cavity block (11), the movable mold cavity block (21), and the sliding block (31) that are close to each other are arc-shaped walls, and the discharge channel (211) is close to the arc-shaped wall of the movable mold cavity block (21).

7. The die-casting mold according to claim 5, characterized in that: The discharge channels each include an exhaust channel and a slag bag area.

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