Precision manufacturing die-casting die for guide rail machining

Abstract

The invention belongs to the technical field of die-casting dies, and particularly relates to a precision manufacturing die-casting die for guide rail machining, which comprises a lower die, an upper die and a stamping hole. An external stamping structure is connected through the stamping hole, molten metal used for die casting is injected through external high pressure, the molten metal flows into the position between the upper forming groove and the lower forming groove through a channel in the upper die, at the moment, the trapezoid block is embedded into the directional flow guide groove to complete plugging, and after the forming operation of the die is completed, the die is cooled and taken out; and the external stamping equipment injects the high-pressure air flow again through the stamping hole, the high-pressure air flow circulates along the path of the forming groove at the moment, and due to the fact that the trapezoidal block is separated from the directional flow guide groove, the high-pressure air flow drives and carries the molten metal residues in the forming groove and then is discharged out of the forming groove. In the mold forming operation, the guide columns are inserted into the sleeve holes to complete preliminary positioning, and meanwhile the fixing keys are inserted into the embedding seams.

Description

Technical Field

[0001] This invention relates to the field of die-casting mold technology, specifically to a precision die-casting mold for guide rail machining. Background Technology

[0002] Die-casting molds for guide rail machining are core tools in modern manufacturing for the efficient production of high-precision metal guide rail components. They rapidly form guide rail parts with complex cross-sections by injecting molten metal under high pressure into a precisely designed cavity. These molds are widely used in machine tools, automated equipment, and rail transportation. They combine structural strength with dimensional stability, meeting the stringent requirements of guide rails for surface finish and geometric tolerances while also achieving economic efficiency in mass production. They are key process equipment for improving the quality and production capacity of basic components in the equipment manufacturing industry.

[0003] Existing technologies have the following shortcomings: Current precision die-casting molds for guide rail machining involve injecting high-temperature molten metal into the mold under high pressure, allowing it to cool and solidify. However, during this process, some alloys (high-silicon aluminum, zinc alloys) have poor fluidity. When using typical guide rail materials such as high-silicon aluminum alloys (e.g., AlSi12) or zinc alloys (e.g., ZA-8), their high viscosity significantly reduces the fluidity of the molten metal. When filling thin-walled or complex cavities, a sudden drop in temperature at the melt front can prematurely form a semi-solid zone. Incompletely filled molten metal may remain at the end of the flow channel due to insufficient kinetic energy, or localized temperature differences may cause molten metal residue inside the mold. The accumulation of this metal residue can severely affect mold precision. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a precision die-casting mold for guide rail machining, which solves the problem that residual molten metal can affect mold precision.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a precision die-casting mold for guide rail processing, comprising a lower mold, an upper mold, and a punching hole for injecting die-casting raw materials, wherein an upper forming groove and a lower forming groove are provided between the upper mold and the lower mold, and the upper and lower forming grooves can be tightly fitted to form a complete mold groove.

[0006] A directional flow channel leading to the outside is opened horizontally at the bottom of the upper mold.

[0007] A trapezoidal block is provided on the top of the lower mold.

[0008] In some embodiments, the lower mold has an internal cavity to reduce the overall weight, and strip-shaped groove structures are formed on both sides.

[0009] In some embodiments, the bottom of the upper mold is provided with guide pillars, and the four corners of the lower mold are provided with sleeve holes for the guide pillars to be inserted. The insertion of the guide pillars into the sleeve holes can effectively prevent the upper and lower molds from shifting positions.

[0010] In some embodiments, the bottom of the upper mold is provided with a plug, and the interior of the lower mold is provided with an inner positioning hole. When the upper and lower molds are assembled, the plug is inserted into the inner positioning hole to further improve the assembly stability.

[0011] In some embodiments, cooling channels are provided between the lower mold and the upper mold, and the cooling channels are provided in several groups and are distributed in a curved shape.

[0012] In some embodiments, a fixing key is provided on the side edge of the lower mold, and a fitting seam is opened on the side of the upper mold. When the upper mold and the lower mold are combined, the fixing key is inserted into the interior of the fitting seam and provides horizontal movement restriction from the edges of the upper and lower molds.

[0013] In some embodiments, a channel is formed at the bottom of the punch hole, and the channel is embedded inside the upper die and extruded from the side end of the forming groove.

[0014] Compared with the prior art, the present invention provides a precision die-casting mold for guide rail machining, which has the following advantages:

[0015] A precision die-casting mold for guide rail machining connects to an external stamping structure via a stamping hole. Molten metal for die casting is injected under high external pressure. The molten metal flows through a channel within the upper mold between the upper and lower forming grooves. At this point, a trapezoidal block is embedded within a directional guide groove to seal the flow. After the mold forming operation is complete and the workpiece is cooled and removed, the external stamping equipment injects high-pressure airflow again through the stamping hole. This time, the high-pressure airflow flows along the path of the forming groove. Since the trapezoidal block has now detached from the directional guide groove, the high-pressure airflow carries and entrains any remaining molten metal residue from inside the forming groove before discharging it. During the mold forming operation, initial positioning is achieved by inserting guide pillars into sleeve holes, while a fixing key is inserted into the fitting seam.

[0016] Through the above settings and processes, the residual molten metal or hard residue inside the mold groove can be directly removed after the guide rail is machined, without the need for additional cleaning equipment. This prevents the accumulation of molten metal residue while stabilizing the production cost, thereby improving the accuracy of the mold after long-term use and avoiding frequent maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2This is a schematic diagram of the side end structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the inner structure of the lower mold of the present invention;

[0020] Figure 4 This is a schematic diagram of the inner structure of the upper mold of the present invention;

[0021] Figure 5 This is a schematic diagram of the location of the directional guide channel and the bolt installation structure of the present invention;

[0022] Figure 6 This is a schematic diagram of the installation position structure of the trapezoidal block of the present invention;

[0023] Figure 7 This is a schematic diagram of the punching holes and their internal orientation in this invention.

[0024] In the diagram: 1. Lower mold; 2. Upper mold; 3. Hook; 4. Stamping hole; 5. External positioning hole; 6. Fitting seam; 7. Cooling water channel; 8. Guide post; 9. Upper forming groove; 10. Fixing key; 11. Sleeve hole; 12. Trapezoidal block; 13. Directional guide channel; 14. Lower forming groove; 15. Insert bolt; 16. Internal positioning hole. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Please see Figure 1-7 In this embodiment: a precision manufacturing die-casting mold for guide rail processing includes a lower mold 1, an upper mold 2, and a punching hole 4 for injecting die-casting raw materials. An upper forming groove 9 and a lower forming groove 14 are provided between the upper mold 2 and the lower mold 1. The upper and lower forming grooves can be tightly fitted to form a complete mold groove. The die-casting of the mold can be completed by connecting the punching hole 4 to an external high-pressure device and injecting the punching raw materials into it.

[0029] The lower mold 1 has an internal cavity to reduce the overall weight, and strip-shaped groove structures are opened on both sides.

[0030] A guide post 8 is provided at the bottom of the upper mold 2, and sleeve holes 11 are provided at the four corners of the lower mold 1 for the guide post 8 to be inserted. Thus, when the upper mold 2 and the lower mold 1 are installed, the guide post 8 can be inserted into the sleeve hole 11 to effectively prevent the upper and lower molds from shifting positions.

[0031] Since the forming of the mold needs to ensure accuracy, in order to further improve the connection and assembly accuracy of the upper mold 2 and the lower mold 1, a bolt 15 is set at the bottom of the upper mold 2, and an inner positioning hole 16 is opened inside the lower mold 1. When the upper mold 2 and the lower mold 1 are assembled, the bolt 15 is inserted into the inner positioning hole 16 to further improve the assembly stability.

[0032] The raw material for the mold prepared by stamping is molten metal at high temperature. Therefore, when it is injected between the upper forming groove 9 and the lower forming groove 14, the high temperature will be quickly conducted to the mold shell. In order to improve heat dissipation performance, cooling channels 7 are opened between the lower mold 1 and the upper mold 2. Several sets of cooling channels 7 are opened and distributed in a curved shape (e.g., Figure 3 As shown in the figure, this increases the contact area between the external water and the inside of the mold, allowing the cooling water to carry more heat out, thus achieving efficient heat dissipation.

[0033] A fixing key 10 is provided on the side edge of the lower mold 1 (e.g.) Figure 3 As shown), a fitting seam 6 is opened on the side of the upper mold 2 (as shown). Figure 4As shown, when the upper mold 2 and the lower mold 1 are joined together, the fixing key 10 is inserted into the interior of the fitting seam 6 and provides horizontal movement restriction from the edge of the upper mold 2 and the lower mold 1, thereby ensuring that there is no slight displacement in the position where the upper forming groove 9 and the lower forming groove 14 come into contact with each other.

[0034] In order to allow the die-casting raw material to be fed into the forming groove after the punch hole 4 is connected to the external punching equipment, a channel is opened at the bottom of the punch hole 4 (e.g., Figure 7 As shown, the channel is embedded inside the upper mold 2 and extruded from the side end of the forming groove. This allows the die-casting material to be rapidly injected into the forming groove under high pressure and the forming process to be completed after cooling.

[0035] Because uneven heating may occur due to localized temperature differences inside the mold, and because the alloy (high-silicon aluminum, zinc alloy) has poor fluidity, molten metal or hard residue may remain inside the forming tank after cooling and molding. To prevent residue accumulation, a directional flow channel 13 is horizontally opened at the bottom of the upper mold 2, leading to the outside (e.g., Figure 5 As shown), the directional guide channel 13 can be used for rapid discharge of residue. Since the directional guide channel 13 is connected to the upper forming tank 9, in order to ensure that the forming tank structure can perform forming operations normally and, on this basis, rapidly discharge molten metal residue, a trapezoidal block 12 (as shown) is set at the corresponding position of the lower mold 1. Figure 2 As shown, when the upper mold 2 and lower mold 1 are closed (die casting operation state), the trapezoidal block 12 blocks the directional flow channel 13 by itself. At this time, the upper forming channel 9 and the lower forming channel 14 can still form a complete forming space. When the mold is completed and needs to be removed, the upper mold 2 and lower mold 1 separate. At this time, the trapezoidal block 12 disengages from the directional flow channel 13, and the high-pressure gas injected through the punch hole 4 blows the residue out of the forming channel along the path of the forming channel. Thus, the inside of the mold forming channel has a rapid cleaning capability.

[0036] In this embodiment, an external stamping structure is connected via the stamping hole 4, and molten metal for die casting is injected under high external pressure. The molten metal flows through the channel in the upper mold 2 into the space between the upper forming groove 9 and the lower forming groove 14. At this time, the trapezoidal block 12 is embedded inside the directional guide groove 13 to complete the sealing. After the mold forming operation is completed and the workpiece is cooled and removed, the external stamping equipment injects high-pressure airflow again through the stamping hole 4. This time, the high-pressure airflow flows along the path of the forming groove. Since the trapezoidal block 12 has now detached from the directional guide groove 13, the high-pressure airflow carries and entrains the molten metal residue inside the forming groove before discharging it into the forming groove. During the above mold forming operation, the guide post 8 is inserted into the sleeve hole 11 to complete the initial positioning, and the fixing key 10 is inserted into the fitting seam 6.

[0037] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A precision die-casting mold for guide rail machining, comprising a lower mold (1), an upper mold (2), and a punching hole (4) for injecting die-casting raw materials, characterized in that: An upper forming groove (9) and a lower forming groove (14) are provided between the upper mold (2) and the lower mold (1). The upper and lower forming grooves can be tightly fitted together to form a complete mold groove. A directional flow channel (13) is opened horizontally at the bottom of the upper mold (2) to the outside; A trapezoidal block (12) is provided on the top of the lower mold (1).

2. The precision die-casting mold for guide rail machining according to claim 1, characterized in that: The lower mold (1) has an internal cavity to reduce the overall weight, and strip grooves are opened on both sides.

3. The precision die-casting mold for guide rail machining according to claim 1, characterized in that: The bottom of the upper mold (2) is provided with guide pillars (8), and the four corners of the lower mold (1) are provided with sleeve holes (11) for the guide pillars (8) to be inserted. The insertion of the guide pillars (8) into the sleeve holes (11) can effectively prevent the upper and lower molds from shifting positions.

4. The precision die-casting mold for guide rail machining according to claim 3, characterized in that: The upper mold (2) is provided with a plug (15) at the bottom, and the lower mold (1) has an inner positioning hole (16) inside. When the upper mold (2) and the lower mold (1) are assembled, the plug (15) is inserted into the inner positioning hole (16) to further improve the assembly stability.

5. The precision die-casting mold for guide rail machining according to claim 1, characterized in that: Cooling channels (7) are provided between the lower mold (1) and the upper mold (2). Several sets of cooling channels (7) are provided and are distributed in a curved shape.

6. The precision die-casting mold for guide rail machining according to claim 4, characterized in that: The lower mold (1) has a fixing key (10) on its side edge, and the upper mold (2) has a fitting seam (6) on its side edge. When the upper mold (2) and the lower mold (1) are combined, the fixing key (10) is inserted into the fitting seam (6) and provides horizontal movement restriction from the edge of the upper mold (2) and the lower mold (1).

7. The precision die-casting mold for guide rail machining according to claim 6, characterized in that: A channel is opened at the bottom of the stamping hole (4), and the channel is embedded in the interior of the upper mold (2) and extruded from the side end of the forming groove.

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