A die casting mold

Abstract

This utility model provides a die-casting mold, including a fixed mold and a moving mold, a slider core, a slider seat, and a locking mechanism. The locking mechanism includes a first driving member and a locking block that moves along a preset path driven by the first driving member. The slider seat has a groove that mates with the locking block. In the mold-closed state, the locking block extends into the groove to lock the slider seat at its lower part. A cooling mechanism is provided to supply cooling water to the molding core, including a cooling water core and a water supply pipe connected to the cooling water core. The locking mechanism locks the slider seat from below, preventing the slider seat and slider from retracting during injection filling, ensuring stable cavity dimensions, and guaranteeing the consistency of the molded product. The cooling mechanism further ensures the processing quality and dimensional stability of the molded product, preventing uneven cooling during solidification.

Description

Technical Field

[0001] This utility model relates to the field of die-casting equipment technology, and in particular to a die-casting mold. Background Technology

[0002] Die casting molds are tools used in the die casting process. Molten metal is rapidly injected into the mold cavity under high pressure, and the finished product is removed after cooling and solidification. Existing die casting molds include a moving mold and a fixed mold that can be joined to form the casting cavity. A slider seat is movably mounted on the moving mold, and a slider core for forming lateral features is connected to the slider seat. During the injection filling process, the molten, high-pressure metal exerts a thrust on the slider core pointing outwards from the mold. The fixed mold is usually equipped with a locking block to firmly lock the slider during injection, preventing it from deforming due to high injection pressure. For example, the die casting mold structure disclosed in Chinese invention application CN202411992503.1 (published as CN119927168A) has an inclined surface on the side of the slider away from the mold core, and a wedge block (equivalent to the aforementioned locking block) adapted to the inclined surface on the fixed mold. When the fixed mold and moving mold are closed, the fixed mold, wedge block, and slider gradually tighten together.

[0003] When the casting is large, especially in height, a cavity with an appropriate height is required. Correspondingly, the slider core and slider seat also need to have a corresponding height. If the existing die-casting mold is used, the following problems will occur: First, the locking block can usually only press against the upper part of the slider seat, which cannot support the pressure on the entire slider. The lower part is prone to deformation or even backward movement, affecting the dimensional accuracy and stability of the casting. If the height of the locking block is increased so that it can act on the slider seat over a larger area, although it can press against the slider seat, the strength of the slider seat will be reduced due to the increased height of the inclined surface on the slider seat. This will lead to elastic deformation or even plastic deformation under strong injection pressure, bending backward or bulging, affecting the cavity size. Second, because the casting is tall, the forming core corresponding to the cavity is also relatively tall. Therefore, it is difficult to achieve uniform cooling during solidification, causing defects such as shrinkage cavities, porosity, and hot cracks in the casting, and making it difficult to ensure dimensional stability. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a die-casting mold that avoids the slide block from retreating and ensures the stability of the casting dimensions, in light of the above-mentioned existing technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the die-casting mold includes:

[0006] A fixed mold and a moving mold, wherein the moving mold is disposed below the fixed mold, and both the fixed mold and the moving mold have a molding core for molding the molded article. The fixed mold and the moving mold have a closed mold state in which they are engaged with each other and a mold open mold state in which they are separated from each other.

[0007] The slider core is used to form the lateral structure of the molded product. It is movably disposed between the fixed mold and the moving mold. In the mold-closed state, the forming cores of the fixed mold and the moving mold and the slider core together form the cavity of the molded product.

[0008] The slider seat is movably mounted on the moving mold and has a locking unit that engages with the slider core.

[0009] Its characteristic is that it further includes:

[0010] The locking mechanism includes a first driving member and a locking block that moves along a preset path by means of the first driving member. The slider seat has a groove that cooperates with the locking block. In the mold closing state, the locking block extends into the groove to lock the slider seat at the lower part of the slider seat.

[0011] A cooling mechanism for supplying cooling water to the molding core, including a cooling water core and a water supply pipe connected to the cooling water core;

[0012] Correspondingly, the moving mold has a first connecting channel in the center for connecting the cooling water core to the corresponding molding core, a second connecting channel for connecting the water supply pipe to the outside of the mold, and a receiving chamber spaced apart from the first connecting channel. The bottom of the receiving chamber has an opening for the locking mechanism to be installed therein, and the opening communicates with the second connecting channel.

[0013] To further prevent the slider seat from retracting, preferably, the side of the slider seat facing away from the slider core has an inclined surface. The fixed mold is provided with a wedge block adapted to the inclined surface. In the mold-closed state, the wedge block abuts against the upper part of the slider seat and cooperates with the locking mechanism to prevent the slider seat from retracting. Thus, the wedge block abuts against the upper part of the slider seat, and the locking mechanism locks the slider seat at the lower part. The combined action of the wedge block and the locking mechanism counteracts the thrust on the slider seat during the injection filling process, which is directed outward from the mold. This prevents the slider seat and the slider engaged on the slider seat from retracting, ensuring the stability of the molded product.

[0014] To enable the locking block to move along a preset path under the drive of the first driving member, preferably, the locking mechanism further includes a first guide member. The first guide member has a guide hole for the locking block to move along the preset path. The moving mold has a second guide member for the sliding block seat to slide. The first guide member has a first through-hole for the second guide member to pass through. The sliding block seat has a guide groove adapted to the second guide member. The first guide member confines the locking block within the guide hole, thereby allowing the locking block to move along the path guided by the guide hole (i.e., the preset path). The cooperation between the second guide member and the guide groove guides the sliding block seat and the sliding block's forward and backward movements, ensuring that the cavity of the molded product is consistent each time the mold is closed, and preventing the sliding block seat from shifting during forward and backward movements, which would affect the lateral structure of the molded product. The first through-hole prevents interference between the first guide member and the second guide member.

[0015] Furthermore, the locking block includes two symmetrically arranged locking legs and a connecting portion connecting the two locking legs and for connection with the first driving member. A second through-hole portion is formed between the two locking legs for the second guide member to pass through, and the second through-hole portion communicates with the first through-hole portion. The design of the locking block with two locking legs makes its locking effect on the slider seat more stable, further preventing the slider seat from moving backward; the setting of the second through-hole portion provides installation space for the second guide member, preventing the second guide member from interfering with the up and down movement of the locking block.

[0016] The groove includes a first groove wall near the slider core. When the slider seat is pushed outwards from the mold, the first groove wall is pressed against the locking block. To prevent wear on the first groove wall, preferably, a wear-resistant block is provided on the first groove wall to reduce wear on the slider seat. The bottom wall of the wear-resistant block is concave upwards to form a third through-hole for the second guide to pass through. The wear-resistant block prevents the slider seat from being directly pressed against the locking block and thus avoids wear, extending the life of the slider seat. The wear-resistant block can also be replaced periodically to ensure its protective function for the slider seat, reducing costs compared to replacing the slider seat when it wears out. The third through-hole prevents interference between the wear-resistant block and the second guide. At the same time, the third through-hole also has the same function as the guide groove, allowing the wear-resistant block to follow the slider seat in its forward and backward movement along the second guide.

[0017] As a structure of a cooling water core, preferably, the cooling water core includes a core and a cooling tube, the head of the cooling tube extends into the internal cavity of the core and is coaxially arranged with the core, and the tail is provided with a connector for connecting a water supply pipeline.

[0018] Furthermore, the connector has an inlet and an outlet. The cooling pipe contains an inlet pipe that is fluidly connected to the inlet. The inlet pipe is coaxially arranged with the core and its front end extends into the internal cavity of the core. The outer side of the head of the core has a first outlet channel connected to the inlet pipe. The first outlet channel is spirally arranged around the central axis of the core. A second outlet channel is formed between the inlet pipe and the tail of the core. The core has a water passage hole that allows fluid communication between the second and first outlet channels. A third outlet channel is formed between the inlet pipe and the cooling pipe, communicating with the second outlet channel. The third outlet channel is fluidly connected to the outlet. During operation, the coolant enters the inlet pipe from the inlet, flows out from the head of the core, and enters the first outlet channel. The spiral arrangement of the first outlet pipe increases the contact area and contact time between the coolant and the core, enhancing the cooling effect. The coolant then enters the second outlet channel through the water passage hole, flows through the third outlet channel, and exits from the outlet.

[0019] Furthermore, the water supply pipeline includes an inlet pipe connected to the inlet and an outlet pipe connected to the outlet, both of which are located within the second connecting channel. Coolant automatically enters the inlet through the inlet pipe, flows through the cooling water core, exits from the outlet, and then flows out through the outlet pipe, forming a cycle that is continuously repeated to cool the molding core.

[0020] To prevent coolant from leaking out from the gap between the cooling pipe and the core, preferably, a plug is provided between the head of the cooling pipe and the core, thereby preventing leakage between the first water outlet channel and the second water outlet channel.

[0021] Compared with the prior art, the advantages of this utility model are:

[0022] 1. The die-casting mold is equipped with a locking mechanism at the moving mold, which includes a locking part that can extend into the groove of the slider seat and lock the slider seat. The slider seat is locked from below to prevent the slider seat and slider from moving backward during the injection filling process, ensuring the stability of the cavity size and ensuring the consistency of the molded product.

[0023] 2. A cooling mechanism is installed in the molding core to make it difficult for the molded product to achieve uniform cooling during cooling and solidification, thereby further ensuring the processing quality and dimensional stability of the molded product;

[0024] 3. By setting up the first connecting channel, the second connecting channel and the accommodating chamber in the moving mold, interference between the cooling mechanism and the locking mechanism is avoided. The opening at the bottom of the accommodating chamber that communicates with the second connecting channel also provides leeway for the setting of the locking mechanism. Attached Figure Description

[0025] Figure 1This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0026] Figure 2 This is a cross-sectional schematic diagram of an embodiment of the present utility model;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0029] Figure 5 This is a cross-sectional schematic diagram of an embodiment of the present invention (excluding the fixed mold);

[0030] Figure 6 for Figure 5 Enlarged view of point C in the middle;

[0031] Figure 7 This is a schematic diagram of the locking mechanism in an embodiment of the present invention;

[0032] Figure 8 This is an exploded view of the locking mechanism in an embodiment of this utility model;

[0033] Figure 9 This is a schematic diagram of the cooling mechanism in an embodiment of the present invention;

[0034] Figure 10 This is a cross-sectional schematic diagram of the cooling mechanism in an embodiment of this utility model. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0036] like Figure 1-10 The figure shown is a preferred embodiment of the present invention.

[0037] The die-casting mold in this embodiment is suitable for molding large-volume products, especially those with considerable height. See [link / reference]. Figure 1-2 The system includes a fixed mold 1 and a movable mold 2 located below the fixed mold 1. Both the fixed mold 1 and the movable mold 2 have molding cores 21 for molding articles. A slider seat 4 is movably disposed between the fixed mold 1 and the movable mold 2. A slider core 3 with a lateral structure for molding articles is engaged on the slider seat 4 by means of a locking unit. The movable mold 2 has a second guide member 25 for sliding the slider seat 4. The slider seat 4 has a guide groove 43 adapted to the second guide member 25. The movement of the slider seat 4 is guided by the cooperation of the second guide member 25 and the guide groove 43. The fixed mold 1 and the movable mold 2 have a closed state where they are engaged with each other and an open state where they are separated from each other. In the closed state, the molding cores 21 and slider cores 3 of the fixed mold 1 and the movable mold 2 together form the cavity of the molded article.

[0038] When the molded part is large, especially in height, a cavity with an appropriate height is required. This necessitates a slider core 3 and a slider seat 4 with corresponding height. A taller slider core 3 results in a greater thrust from the molten, high-pressure metal during injection filling, pointing outwards from the mold, which can easily push the slider core 3 and slider seat 4 backwards. (See also...) Figure 2-6 To prevent the slider seat 4 from retracting during the injection filling process and affecting the molding quality of the molded product, this embodiment provides a locking mechanism 5 on the moving mold 2 and a wedge block 7 on the fixed mold 1. In the mold-closed state, the locking mechanism 5, through the locking block 52, extends into the groove 41 at the bottom of the slider seat 4, locking the slider seat 4 at its lower part. The wedge block 7 is adapted to the inclined surface 42 on the side of the slider seat 4 facing away from the slider core 3 and can abut against the slider seat 4 from above. During the die-casting process, the locking action of the locking mechanism 5 and the abutting action of the wedge block 7 work together to counteract the thrust on the slider seat 4 directed towards the outside of the mold, thereby preventing the slider seat 4 and the slider engaged on it from retracting and ensuring the stability of the molded product.

[0039] For the setting method and specific structure of locking mechanism 5, please refer to [link / reference]. Figure 7-8 The locking mechanism 5 is disposed within the receiving chamber 24 of the moving mold 2. The bottom of the receiving chamber 24 has an opening 241 for the locking mechanism 5 to be disposed therein. The locking mechanism 5 includes a first driving member 51, a locking block 52 that moves along a preset path driven by the first driving member 51, and a first guide member 53 that guides the movement of the locking block 52. The first guide member 53 has a guide hole 531 for the locking block 52 to move along the preset path. The slider seat 4 has a groove 41 that mates with the locking block 52. In the mold-closed state, the first driving member 51 drives the locking block 52 to move along the preset path within the guide hole 531 and extend into the groove 41, thereby locking the slider seat 4 at its lower part. Figure 3 As shown. In this embodiment, the locking block 52 includes two symmetrically arranged locking legs 521 and a connecting portion 522 connecting the two locking legs 521 and for connecting with the first driving member 51. The two locking legs 521 make the locking action on the slider seat 4 more stable, further preventing the slider seat 4 from retracting. To prevent the second guide member 25 from interfering with the locking mechanism 5 and performing the locking action, the first guide member 53 has a first through portion 532 through which the second guide member 25 passes. A second through portion 523 through which the second guide member 25 passes is formed between the two locking legs 521, and the second through portion 523 communicates with the first through portion 532.

[0040] Furthermore, to prevent the locking block 52 from wearing down the slider seat 4 due to its up-and-down movement, this embodiment provides a wear-resistant block 44 in the groove portion 41. Specifically, the groove portion 41 includes a first groove wall 411 near the slider core 3, and the wear-resistant block 44 is disposed on the first groove wall 411. When the slider seat 4 is subjected to a pushing force pointing outward from the mold, the first groove wall 411 will be pressed against the locking block 52, causing the first groove wall 411 to be prone to wear. This arrangement transforms the structure that is in direct contact with the locking block 52 and is prone to wear from the first groove wall 411 to the wear-resistant block 44, thereby protecting the first groove wall 411 from wear and extending the life of the slider seat 4. The wear-resistant block 44 can also be replaced periodically to ensure its protective effect on the slider seat 4, which can reduce costs compared to the replacement of the slider seat 4 due to wear. The bottom wall of the wear-resistant block 44 is recessed upward to form a third through part 441 through which the second guide member 25 passes. The third through part 441 avoids interference between the wear-resistant block 44 and the second guide member 25. At the same time, since the wear-resistant block 44 also needs to follow the slider seat 4 to move forward and backward, the third through part 441 plays the same role as the guide groove 43, and it cooperates with the second guide member 25 to guide the forward and backward movement of the wear-resistant block 44.

[0041] To prevent defects such as shrinkage cavities, porosity, and hot cracks in tall molded parts due to uneven cooling during the molding and cooling process, the die-casting mold in this embodiment also includes a cooling mechanism 6 for supplying cooling water to the molding core 21. (See attached image) Figure 2 The cooling mechanism 6 includes a cooling water core 61 and a water supply pipe 62 connected to the cooling water core 61. Since a locking mechanism 5 is provided within the moving mold 2 in this embodiment, special modifications are made to the structure of the moving mold 2 to avoid interference between the locking mechanism 5 and the water supply pipe 62. Specifically, a first connecting channel 22 is provided in the center of the moving mold 2 for connecting the cooling water core 61 to the corresponding molding core 21, and a second connecting channel 23 is provided for the water supply pipe 62 to connect the outside of the mold 2 to the cooling water core 61. The receiving chamber 24 is spaced apart from the first connecting channel 22, and its bottom opening 241 communicates with the second connecting channel 23. Since the second connecting channel 23 communicates with the bottom opening 241 of the receiving chamber 24, the second connecting channel 23 provides leeway for the installation of the locking mechanism 5.

[0042] For the specific structure of cooling water core 61, please refer to [link / reference]. Figure 9-10In this embodiment, the cooling water core 61 includes a core 611 and a cooling pipe 612. The head of the cooling pipe 612 extends into the internal cavity of the core 611 and is coaxially arranged with the core 611. A plug 618 is provided between the head of the cooling pipe 612 and the core 611 to prevent leakage. The tail of the cooling pipe 612 is provided with a connector 613 for connecting to the water supply pipe 62. The connector 613 has an inlet 6131 and an outlet 6132. The water supply pipe 62 includes an inlet pipe 621 connected to the inlet 6131 and an outlet pipe 622 connected to the outlet 6132. Both the inlet pipe 621 and the outlet pipe 622 are located in the second connecting channel 23. The cooling tube 612 is provided with a water inlet pipe 614 that is in fluid communication with the water inlet 6131. ​​The water inlet pipe 614 is coaxially arranged with the core 611 and its front end extends into the internal cavity of the core 611. The outer side of the head of the core 611 has a first water outlet channel 615 that is connected to the water inlet pipe 614. The first water outlet channel 615 is arranged in a spiral around the central axis of the core 611. A second water outlet channel 616 is formed between the water inlet pipe 614 and the tail of the core 611. The core 611 has a water passage hole 6111 that allows the second water outlet channel 616 and the first water outlet channel 615 to be in fluid communication. A third water outlet channel 617 is formed between the water inlet pipe 614 and the cooling tube 612 that is in fluid communication with the second water outlet channel 616. The third water outlet channel 617 is in fluid communication with the water outlet 6132. During operation, the coolant automatically enters the mold core 21 through the inlet pipe 621, flows through the inlet pipe 614, exits from the head of the core 611, and enters the first outlet channel 615. The spiral arrangement of the first outlet channel increases the contact area and contact time between the coolant and the core 21, enhancing its cooling effect. Finally, it enters the second outlet channel 616 through the water passage 6111, flows through the third outlet channel 617, exits from the outlet 6132, and flows to the outside through the outlet pipe 622. This process forms a cycle, which is continuously repeated to cool the core 21.

Claims

1. A die-casting mold, comprising: A fixed mold (1) and a moving mold (2), wherein the moving mold (2) is disposed below the fixed mold (1), and both the fixed mold (1) and the moving mold (2) have a molding core (21) for molding the molded article A. The fixed mold (1) and the moving mold (2) have a closed mold state that is engaged with each other and a mold open mold state that is separated from each other. The slider core (3) is used to form the side structure of the molded product A. It is movably set between the fixed mold (1) and the moving mold (2). In the mold-closed state, the molding core (21) of the fixed mold (1) and the moving mold (2) and the slider core (3) together form the cavity of the molded product A. The slider seat (4) is movably disposed on the moving mold (2) and has a locking unit that engages with the slider core (3); characterized in that It also includes: The locking mechanism (5) includes a first driving member (51) and a locking block (52) that moves along a preset path by means of the first driving member (51). The slider seat (4) has a groove (41) that cooperates with the locking block (52). In the mold closing state, the locking block (52) extends into the groove (41) to lock the slider seat (4) at the lower part of the slider seat (4). The cooling mechanism (6) is used to supply cooling water to the molding core (21), including a cooling water core (61) and a water supply pipe (62) connected to the cooling water core (61); Correspondingly, the center of the moving mold (2) is provided with a first connecting channel (22) for the cooling water core (61) to connect to the corresponding molding core (21), and a second connecting channel (23) for the water supply pipeline (62) to connect to the outside of the automatic mold (2) for the cooling water core (61). A receiving chamber (24) is provided at a distance from the first connecting channel (22). The bottom of the receiving chamber (24) is provided with an opening (241) for the locking mechanism (5) to be installed therein. The opening (241) communicates with the second connecting channel (23).

2. The die casting mold according to claim 1, characterized in that: The slider seat (4) has an inclined surface (42) on the side away from the slider core (3). The fixed mold (1) is provided with a wedge block (7) that is adapted to the inclined surface (42). In the mold closing state, the wedge block (7) abuts against the slider seat (4) at the upper part of the slider seat (4) and can cooperate with the locking action of the locking mechanism (5) to prevent the slider seat (4) from moving backward.

3. The die casting mold according to claim 1 or 2, characterized in that: The locking mechanism (5) further includes a first guide member (53), which has a guide hole (531) for the locking block (52) to move along a preset path. The moving mold (2) has a second guide member (25) for the slider seat (4) to slide. The first guide member (53) has a first through part (532) for the second guide member (25) to pass through. The slider seat (4) has a guide groove (43) that is adapted to the second guide member (25).

4. The die-casting mold according to claim 3, characterized in that: The locking block (52) includes two symmetrically arranged locking legs (521) and a connecting part (522) connecting the two locking legs (521) and for connecting with the first driving member (51). A second through part (523) is formed between the two locking legs (521) for the second guide member (25) to pass through. The second through part (523) communicates with the first through part (532).

5. The die-casting mold according to claim 3, characterized in that: The groove (41) includes a first groove wall (411) near the slider core (3), and a wear-resistant block (44) for reducing wear of the slider seat (4) is provided on the first groove wall (411); the bottom wall of the wear-resistant block (44) is recessed upward to form a third through part (441) for the second guide (25) to pass through.

6. The die-casting mold according to claim 1 or 2, characterized in that: The cooling water core (61) includes a core (611) and a cooling pipe (612). The head of the cooling pipe (612) extends into the internal cavity of the core (611) and is coaxially arranged with the core (611). The tail is provided with a connector (613) for connecting to the water supply pipe (62).

7. The die-casting mold according to claim 6, characterized in that: The connector (613) has an inlet (6131) and an outlet (6132). The cooling pipe (612) is provided with an inlet pipe (614) that is in fluid communication with the inlet (6131). The inlet pipe (614) is coaxially arranged with the core (611) and its front end extends into the internal cavity of the core (611). The outer side of the head of the core (611) has a first outlet channel (615) that is connected to the inlet pipe (614). The first outlet channel (615) surrounds the middle of the core (611). The mandrel is arranged in a spiral shape. A second water outlet channel (616) is formed between the water inlet pipe (614) and the tail of the core (611). The core (611) has a water passage hole (6111) that allows the second water outlet channel (616) and the first water outlet channel (615) to be fluidly connected. A third water outlet channel (617) is formed between the water inlet pipe (614) and the cooling pipe (612) and is connected to the second water outlet channel (616). The third water outlet channel (617) is fluidly connected to the water outlet (6132).

8. The die-casting mold according to claim 7, characterized in that: The water supply pipeline (62) includes an inlet pipeline (621) connected to the inlet (6131) and an outlet pipeline (622) connected to the outlet (6132). Both the inlet pipeline (621) and the outlet pipeline (622) are located in the second connecting channel (23).

9. The die-casting mold according to claim 7, characterized in that: A plug (618) is provided between the head of the cooling pipe (612) and the core (611) to prevent leakage between the first water outlet channel (615) and the second water outlet channel (616).

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