Die-casting die capable of directly forming inner side hole of product

Abstract

A die-casting die capable of directly forming an inner side hole comprises an upper die base, a lower die base, a base, an upper die core, a lower die core, a pitched roof mechanism and a cooling mechanism, the upper die core and the lower die core are fixed to the upper die base and the lower die base respectively, and a forming cavity used for forming a product is formed between the upper die core and the lower die core when the upper die base and the lower die base are closed. The cooling mechanism is arranged on the lower die base, a part of the cooling mechanism is located on the peripheral side of the forming cavity, the inclined ejector mechanism comprises an inclined ejector rod, the front inclined matching face of the inclined ejector rod is provided with a protruding block used for forming an inner side hole of a product, and the protruding block is located in the middle of the forming cavity. According to the die-casting die, the protruding block is arranged on the inclined ejector rod and located in the middle of the forming cavity, so that the oil way hole of the reduction gearbox cover can be directly formed, the die core structure does not need to be changed, subsequent CNC machining does not need to be carried out, and the manufacturing cost of the reduction gearbox cover is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a die-casting die, in particular to a die-casting die which can directly form inner holes of products. Background Art

[0002] The gearbox cover is generally die-cast by a die-casting mold. At present, some gearbox covers are provided with an oil passage hole in the middle for cooling and lubricating the two bearing positions. Since the above-mentioned oil passage hole is an inner hole, and the inner wall of the gearbox cover is thicker, and the temperature of the die-casting mold is high, it is difficult to directly form the above-mentioned oil passage hole by changing the core structure. In addition, changing the core structure is prone to failure, and the weight of the die-casting mold machine is as high as 1,000 tons, and the maintenance cost is high. Existing die-casting molds usually do not directly form the above-mentioned oil passage hole, but use later CNC processing to process the oil passage hole.

[0003] However, the cost of machining the reduction gearbox cover using CNC technology is very high, which restricts the reduction of the manufacturing cost of the reduction gearbox cover. Utility Model Content

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to design a die-casting mold that can directly form an inner hole of a product, so as to solve the problem of high cost caused by forming the inner hole using a CNC process.

[0005] To achieve the above-mentioned purpose, the utility model provides a die-casting mold that can directly form an inner hole, including: an upper mold base, a lower mold base, a base, an upper mold core, a lower mold core, a tilted ejection mechanism and a cooling mechanism, the upper mold core and the lower mold core are respectively fixed to the upper mold base and the lower mold base, when the upper mold base and the lower mold base are molded together, there is a molding cavity for forming a product between the upper mold core and the lower mold core, the cooling mechanism is arranged on the lower mold base and a part of the cooling mechanism is located on the peripheral side of the molding cavity, the tilted ejection mechanism includes: a tilted ejection rod, the positive inclined matching surface of the tilted ejection rod has a protrusion for forming the inner hole of the product, and the protrusion is located in the middle of the molding cavity.

[0006] Furthermore, there are two inclined lift mechanisms, wherein the two inclined lift mechanisms can form two inner holes in the product.

[0007] Furthermore, the lift mechanism further comprises: a guide block, the guide block being fixed to the lower die base, the guide block having a guide inclined hole, the lift rod passing through the guide inclined hole to guide the movement of the lift rod. Among them, since the lift mechanism is provided with a guide block for guiding the lift rod, the moving direction of the lift rod can be made more accurate, ensuring smooth demoulding of the product.

[0008] Furthermore, the tilting mechanism further includes: a tilting seat and at least two rollers, wherein the tilting seat is fixed to the base, and the tilting seat has at least two horizontally arranged rolling grooves, and two rollers are respectively arranged in the two rolling grooves to guide the movement of the rollers. Among them, since at least two rollers are arranged on both sides of the tilting rod, and the two rollers are respectively matched with the two rolling grooves, the friction of the plane can be reduced, so that the movement of the tilting rod is smoother.

[0009] Furthermore, the distance between the bottom surface of the rolling groove and the bottom surface of the inclined lift seat is more than 120 mm, and the overall length of the inclined lift rod is less than 330 mm. Increasing the support height of the inclined lift seat can relatively reduce the overall length of the inclined lift rod, thereby enhancing the strength of the inclined lift rod.

[0010] Furthermore, the cooling mechanism has a plurality of cooling points and at least one cooling channel, the plurality of cooling points are all located around the molding cavity and are distributed around the molding cavity, and the cooling points are connected to at least one cooling channel. Since the plurality of cooling points are distributed around the molding cavity, the temperature around the inclined ejector pin can be quickly reduced, thereby ensuring smooth molding of the inner hole of the product.

[0011] After adopting the above technical scheme, the beneficial effect of the utility model is: since the above-mentioned die-casting mold is provided with a protrusion on the inclined ejector rod, and the protrusion is located in the middle of the molding cavity, the oil passage hole of the reduction gear cover can be directly formed without changing the mold core structure or performing subsequent CNC processing, thereby greatly reducing the manufacturing cost of the reduction gear cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the die-casting mold involved in the utility model;

[0013] Figure 2 This is an internal view of the die-casting mold involved in the utility model;

[0014] Figure 3 This is an internal view of the mold core involved in the utility model;

[0015] Figure 4 It is a schematic diagram of the inclined lift mechanism involved in the utility model;

[0016] Figure 5 It is a schematic diagram of the reduction gearbox cover involved in the utility model.

[0017] The accompanying drawings are marked as follows: 1. upper die seat; 2. lower die seat; 3. base; 4. upper die core; 5. lower die core; 6. inclined ejector mechanism; 61. inclined ejector rod; 610. protrusion; 62. inclined ejector seat; 620. rolling groove; 63. roller; 64. guide block; 640. guide inclined hole; 7. cooling mechanism; 71. cooling channel; 72. cooling point; 8. reduction gear box cover; 80. oil hole. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below by way of embodiments:

[0019] The utility model provides a die-casting mold which can directly form the inner hole of the product, combined with Figures 1 to 4 As shown, the die-casting mold includes: an upper die base 1, a lower die base 2, a base 3, an upper die core 4, a lower die core 5, a tilting mechanism 6 and a cooling mechanism 7. The upper die core 4 and the lower die core 5 are respectively fixed to the upper die base 1 and the lower die base 2. When the upper die base 1 and the lower die base 2 are molded together, there is a molding cavity for forming a product between the upper die core 4 and the lower die core 5. The tilting mechanism 6 is arranged on the base 3 and a part of the tilting mechanism 6 is located in the molding cavity. The cooling mechanism 7 is arranged on the lower die base 2 and a part of the cooling mechanism 7 is located on the peripheral side of the molding cavity. When using the above-mentioned die-casting mold, firstly, the upper die base 1 and the lower die base 2 are molded together, and then the die-casting mold is heated, and at the same time, the material for forming the product is injected into the molding cavity until the material fills the molding cavity, and then the cooling mechanism 7 is used to cool it so that the product is finally formed, and finally the mold is opened, and the tilting mechanism 6 is used to eject the product.

[0020] For details, please continue to refer to Figure 4 As shown, the inclined ejector mechanism 6 includes: an inclined ejector rod 61, an inclined ejector seat 62, at least two rollers 63 and a guide block 64. The positive inclined surface of the inclined ejector rod 61 has a convex block 610 for forming the inner hole of the product. The convex block 610 is located in the middle of the molding cavity. The two rollers 63 are respectively rotatably arranged on the two opposite sides of the inclined ejector rod 61. The inclined ejector seat 62 is fixed to the base 3. The inclined ejector seat 62 has at least two horizontally arranged rolling grooves 620. The two rollers 63 are respectively arranged in the two rolling grooves 620 to guide the movement of the rollers 63. The guide block 64 is fixed to the lower die seat 2. The guide block 64 has a guide inclined hole 640. The inclined ejector rod 61 passes through the guide inclined hole 640 to guide the movement of the inclined ejector rod 61. It should be noted that the positive inclined surface of the inclined ejector rod 61 refers to the inclined surface facing the inner hole, which is opposite to its reverse inclined surface. When the inclined ejector mechanism 6 is working, the inclined ejector rod 61 moves relative to the guide block 64 under the guidance of the guide inclined hole 640 to lift the product, thereby realizing the demoulding operation of the product; during the movement of the inclined ejector rod 61, the two rollers 63 move in the two rolling grooves 620 respectively.

[0021] In this embodiment, the guide block 64 is used to guide the movement of the inclined ejector rod 61, so that the moving direction of the inclined ejector rod 61 can be more accurate. In other embodiments, the guide inclined hole can also be directly provided on the lower die base 2, but the size of the lower die base 2 itself is relatively large. Compared with the structure in which the guide block 64 is provided separately, the size accuracy of the guide inclined hole provided on the lower die base 2 is lower, resulting in a lower matching accuracy between the wire inclined hole and the inclined ejector rod 61.

[0022] In this embodiment, the rolling groove 620 is used to guide the movement of the roller 63, which can improve the smoothness of the inclined ejector rod 61. In other embodiments, the roller 63 and the rolling groove 620 may not be provided, and other limiting methods may be used, such as providing a guide rod and a track groove, but such a structure has a large friction force and the smoothness of movement is not as good as that of this embodiment.

[0023] Among them, Figure 5 As shown, the product manufactured by the die-casting mold is a reduction box cover 8, and an oil passage hole is provided in the middle of the reduction box cover 8, and the oil passage hole is an inner hole. During the die-casting process, the protrusion 610 is located at the position corresponding to the oil passage hole, so that the oil passage hole is finally formed, and the protrusion 610 withdraws from the oil passage hole during demolding. Since the die-casting mold is provided with the protrusion 610 on the inclined ejector rod 61, and the protrusion 610 is located in the middle of the molding cavity, the oil passage hole of the reduction box cover 8 can be directly formed without changing the mold core structure or performing subsequent CNC processing, which greatly reduces the manufacturing cost of the reduction box cover 8.

[0024] In this embodiment, there are two inclined lift mechanisms 6, and two oil holes 80 can be formed in the middle of the reduction box cover 8. Of course, in other embodiments, there can be three or more inclined lift mechanisms 6.

[0025] As a preferred solution, the distance between the bottom surface of the rolling groove 620 and the bottom surface of the inclined ejector seat 62 is more than 120 mm, and the overall length of the inclined ejector rod 61 is less than 330 mm.

[0026] For details, please continue to refer to Figure 3 As shown, the cooling mechanism 7 has a plurality of cooling points 72 and at least one cooling channel 71. The plurality of cooling points 72 are all located on the peripheral side of the molding cavity and are distributed around the molding cavity. The cooling points 72 are connected to at least one cooling channel 71. When the cooling mechanism 7 is working, the coolant flows into the cooling point 72 through the cooling channel 71, thereby cooling the product.

Claims

1. A die-casting mold capable of directly forming inner holes of a product, comprising: An upper mold base, a lower mold base, a base, an upper mold core, a lower mold core, a tilted ejection mechanism and a cooling mechanism, wherein the upper mold core and the lower mold core are respectively fixed to the upper mold base and the lower mold base, and when the upper mold base and the lower mold base are closed, a molding cavity for forming a product is provided between the upper mold core and the lower mold core, and the cooling mechanism is arranged on the lower mold base and a part of the cooling mechanism is located on the peripheral side of the molding cavity, and is characterized in that: the tilted ejection mechanism comprises: a tilted ejection rod, the positive inclined matching surface of the tilted ejection rod has a protrusion for forming an inner hole of the product, and the protrusion is located in the middle of the molding cavity.

2. The die-casting mold capable of directly forming inner holes of products according to claim 1, characterized in that: There are two inclined lift mechanisms.

3. The die-casting mold capable of directly forming inner holes of products according to claim 1, characterized in that: The lift mechanism further comprises: a guide block, the guide block is fixed to the lower die base, the guide block has a guide inclined hole, and the lift rod passes through the guide inclined hole to guide the movement of the lift rod.

4. The die-casting mold capable of directly forming inner holes of products according to claim 1, characterized in that: The inclined lift mechanism also includes: an inclined lift seat and at least two rollers. The inclined lift seat is fixed to the base. The inclined lift seat has at least two horizontally arranged rolling grooves. The two rollers are respectively arranged in the two rolling grooves to guide the movement of the rollers.

5. The die-casting mold capable of directly forming inner holes of products according to claim 4, characterized in that: The distance between the bottom surface of the rolling groove and the bottom surface of the inclined ejector seat is more than 120 mm, and the overall length of the inclined ejector rod is less than 330 mm.

6. The die-casting mold capable of directly forming inner holes of products according to claim 1, characterized in that: The cooling mechanism has a plurality of cooling points and at least one cooling channel. The plurality of cooling points are all located on the peripheral side of the molding cavity and are distributed around the molding cavity. The cooling points are connected to at least one cooling channel.

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