Anti-deformation die for die casting

Abstract

The utility model relates to the technical field of die casting, specifically is a kind of die casting anti-deformation mould, including mould body, die core is engaged and installed in the mould body, the both ends of die core are fixed with clamping block, fixed mechanism is rotated in the mould body, the fixed mechanism includes rotating block and screw rod, screw rod is rotatably installed in the mould body, rotating block is fixedly connected on the screw rod, resistance block is threadedly connected on the screw rod, sliding bar is abutted on the resistance block, sliding connection between the sliding bar and mould body, telescopic spring is sleeved on the sliding bar, plug block is fixedly installed on the sliding bar, and clamping block is clampingly connected between the plug block and clamping block;Screw rod drives plug block and the clamping block of the both ends of die core clamping, can realize the accurate positioning of die core, effectively limit the radial deviation of die core, ensure the position stability of die core in mould, thereby maintain the shape accuracy of mould cavity, prevent the deformation of mould due to die core displacement.

Description

Technical Field

[0001] This utility model relates to a mold, specifically a die-casting anti-deformation mold, belonging to the field of die-casting mold technology. Background Technology

[0002] A die-casting mold is a mold used to fill a mold cavity with liquid or semi-liquid metal under high pressure and high speed, and then solidify it under pressure to obtain a die-cast part. A die-casting mold generally consists of two main parts: a fixed mold and a moving mold. The fixed mold is fixed to the fixed platen of the die-casting machine and has a sprue connected to the nozzle or pressure chamber of the die-casting machine. The moving mold is fixed to the moving platen of the die-casting machine and moves with the moving mold mounting plate during opening and closing. When the mold is closed, the two molds close to form the cavity, gating system, and overflow and venting system. When the mold is opened, the moving mold separates from the fixed mold, and the casting is ejected by the ejection mechanism on the moving mold. The cavity forms the outer surface of the casting, while the core is used to form the inner surface, holes, or protrusions of the casting.

[0003] However, if the fixing components of the mold core become loose, the high pressure impact of the molten metal during die casting will cause the mold core to shift radially. The edge of the mold core will exert a lateral force on the side wall of the mold cavity. Under long-term action, this can easily lead to local collapse or bulging of the cavity, which in turn reduces the overall shape accuracy of the mold. Utility Model Content

[0004] The purpose of this utility model is to provide a die-casting anti-deformation mold to solve the above problems. The lead screw drives the insert block to engage with the locking blocks at both ends of the mold core, which can achieve precise positioning of the mold core, effectively limit the radial displacement of the mold core, ensure the stability of the mold core in the mold, thereby maintaining the shape accuracy of the mold cavity and preventing the mold from deforming due to the displacement of the mold core.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a die-casting anti-deformation mold, comprising a mold body, a mold core being fitted inside the mold body, and locking blocks fixed at both ends of the mold core; a fixing mechanism being rotatably mounted inside the mold body, the fixing mechanism comprising a rotating block and a lead screw; the lead screw being rotatably mounted inside the mold body, the rotating block being fixedly connected to the lead screw; a stop block being threadedly connected to the lead screw; a sliding rod being abutted against the stop block; the sliding rod being slidably connected to the mold body; a telescopic spring being sleeved on the sliding rod; and an insert block being fixedly mounted on the sliding rod, the insert block being fitted with the locking block.

[0006] Preferably, the insert block is slidably connected to the mold body, the part of the locking block that contacts the insert block is set with an inclined structure, and the locking block is engaged with the mold body.

[0007] Preferably, the diameter of the portion of the slide rod near the telescopic spring is larger than the diameter of the telescopic spring, and the portion of the slide rod near the abutment is configured with an inclined surface.

[0008] Preferably, the rotating block is located at one end of the lead screw near the mold body, the abutment is slidably connected to the mold body, and the part of the abutment that contacts the slide rod is also set with an inclined structure.

[0009] Preferably, the card block has two symmetrical slots, and the slots are fitted with inserts.

[0010] Preferably, a cooling mechanism is connected within the mold body. The cooling mechanism includes a connector and a water pipe. Connectors are threaded onto both sides of the mold body, and water pipes are fixedly installed on the connectors.

[0011] Preferably, the cooling mechanism further includes a cold water tank, and the cold water tank is provided at the part of the mold body near the mold core, and the cold water tank is arranged in a tortuous pipe-like structure.

[0012] Preferably, the cooling mechanism further includes a water inlet hole, which is provided on the part of the mold body near the connector and is connected to the cold water tank.

[0013] The beneficial effects of this utility model are as follows: the inclined engagement structure of the insert block and the locking block, combined with the threaded locking of the screw, can withstand the impact pressure of molten metal, avoid casting flash or dimensional deviation caused by mold core loosening, ensure the stability of the mold core in the mold, thereby maintaining the shape accuracy of the mold cavity and preventing the mold from deforming due to mold core displacement; the telescopic spring compensates for the thermal expansion of the mold core through elastic deformation, reduces the internal stress of the mold core caused by rigid fixing, and reduces the risk of mold core cracking; the locking and releasing of the insert block can be completed by rotating the block to drive the screw, which shortens the disassembly and assembly time compared with traditional bolt fixing, and facilitates mold core replacement or cleaning. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure between the mold body and the cold water tank of this utility model;

[0016] Figure 3 for Figure 2 The diagram shown is an enlarged view of the structure of part A.

[0017] Figure 4 This is a schematic diagram of the connection structure between the mold core and the card block of this utility model;

[0018] Figure 5 This is a schematic diagram of the connection structure between the mold body and the connector of this utility model;

[0019] Figure 6 for Figure 5The diagram shown is an enlarged view of the structure of section B.

[0020] Figure 7 for Figure 5 The diagram shows an enlarged view of section C.

[0021] In the diagram: 1. Mold body; 2. Mold core; 3. Clamping block; 4. Fixing mechanism; 401. Rotating block; 402. Lead screw; 403. Abutment block; 404. Slide rod; 405. Telescopic spring; 406. Insert block; 5. Cooling mechanism; 501. Connector; 502. Water inlet pipe; 503. Cold water tank; 504. Water inlet hole; 6. Slot. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-7As shown, a die-casting anti-deformation mold includes a mold body 1. A mold core 2 is fitted inside the mold body 1. Both ends of the mold core 2 are fixed with locking blocks 3, which are engaged with the mold body 1. A fixing mechanism 4 is rotatably installed inside the mold body 1. The fixing mechanism 4 includes a rotating block 401 and a lead screw 402. The lead screw 402 is rotatably installed inside the mold body 1. The rotating block 401 is fixedly connected to the lead screw 402. A stop block 403 is threaded onto the lead screw 402. A sliding rod 404 abuts against the stop block 403. The portion of the sliding rod 404 near the stop block 403 is arranged with an inclined structure. The sliding rod 404 is slidably connected to the mold body 1. A telescopic spring 405 is sleeved on the sliding rod 404. The diameter of the portion of the sliding rod 404 near the telescopic spring 405 is larger than the diameter of the telescopic spring 405. Rotating the rotating block 401 causes the lead screw 402 to rotate accordingly. The stop block 403 fixed at the end of rod 402 begins to move. The inclined inner wall of the stop block 403 pushes the slide rod 404 to slide inside the mold body 1. The slide rod 404 overcomes the elastic force of the telescopic spring 405. The telescopic spring 405 can compensate for the thermal expansion of the mold core 2 during the die casting process to a certain extent, reduce the deformation of the mold core 2 caused by thermal stress, and extend the service life of the mold core 2. An insert block 406 is fixedly installed on the slide rod 404. The insert block 406 is engaged with the locking block 3. The part of the locking block 3 that contacts the insert block 406 is set with an inclined structure. The insert block 406 is slidably connected to the mold body 1. When the insert block 406 contacts the inner wall of the locking block 3, the rotating block 401 continues to rotate. Using the inclined structure, the insert block 406 gradually engages in the slot 6 of the locking block 3, thereby completing the fixation of the mold core 2. After fixation, the mold core 2 is gently shaken to check whether it is stable and to ensure that there is no displacement during the die casting process.

[0024] As a technical optimization of this utility model, two slots 6 are symmetrically provided in the card block 3. The slot 6 is fitted with an insert block 406. Through the engagement of the insert block 406 and the card block 3, the position of the mold core 2 in the mold body 1 can be accurately positioned, ensuring the stability of the mold core 2 during die casting. This avoids defects such as dimensional deviation of the die casting or flash caused by the displacement of the mold core 2, ensuring the stability of the position of the mold core 2 in the mold body 1, thereby maintaining the shape accuracy of the mold cavity and preventing the mold from deforming due to the displacement of the mold core 2.

[0025] As a technical optimization of this utility model, a cooling mechanism 5 is connected inside the mold body 1. The cooling mechanism 5 includes a connector 501 and a water inlet pipe 502. The connectors 501 are threadedly installed on both sides of the mold body 1, and the water inlet pipes 502 are fixedly installed on the connectors 501. The external water inlet pipes 502 are tightly connected to the connectors 501 on both sides of the mold body 1 to ensure that there is no water leakage at the connection. A cold water tank 503 is provided near the mold core 2 of the mold body 1. The cold water tank 503 is meandering. The mold body 1 has a tubular structure with a water inlet 504 near the connector 501. The water inlet 504 is connected to the cold water tank 503. When the cooling system is activated, the coolant enters the cold water tank 503 through the water inlet pipe 502 and the water inlet 504. The coolant circulates in the cold water tank 503, which can remove the heat from the mold. Uniform cooling can make the die casting cool at a consistent rate, reduce problems such as shrinkage deformation and internal stress concentration caused by uneven cooling, and improve the quality and yield of the die casting.

[0026] In use, the operator first carefully places the mold core 2 into the mold body 1, aligning the locking blocks 3 at both ends of the mold core 2 with their fixed positions within the mold body 1. Then, using a tool, the operator rotates the rotating block 401, causing the lead screw 402 to rotate accordingly. The abutment 403 fixed at the end of the lead screw 402 begins to move, and the inclined inner wall of the abutment 403 pushes the sliding rod 404 to slide inside the mold body 1. The sliding rod 404 overcomes the elastic force of the telescopic spring 405, which to some extent compensates for the movement of the mold core 2 during the die-casting process. Thermal expansion reduces deformation of the mold core 2 caused by thermal stress, extending its service life. The slide bar 404 drives the insert block 406 to slide closer to the locking block 3. When the insert block 406 contacts the inner wall of the locking block 3, the rotating block 401 continues to rotate. Utilizing the inclined surface structure, the insert block 406 gradually engages with the slot 6 of the locking block 3, thus completing the fixation of the mold core 2. After fixation, gently shake the mold core 2 to check its stability and ensure no displacement occurs during die casting. The engagement of the insert block 406 and the locking block 3 ensures precise... Positioning the core 2 within the mold body 1 ensures its stability during die casting, preventing dimensional deviations or flash defects in the die casting due to core 2 misalignment. Maintaining the core 2's stable position within the mold body 1 preserves the shape accuracy of the mold cavity and prevents mold deformation caused by core 2 displacement. Next, the external water inlet pipe 502 is tightly connected to the connectors 501 on both sides of the mold body 1, ensuring no leakage at the connection. The cooling system is then activated, allowing coolant to enter the cold water tank 503 through the water inlet pipe 502 and water inlet hole 504. The coolant circulates in the cold water tank 503, carrying away heat from the mold. Uniform cooling ensures consistent cooling rates for the die casting, reducing shrinkage deformation and internal stress concentration caused by uneven cooling, thus improving the quality and yield of the die casting. During die casting, close monitoring of mold temperature changes is crucial. Temperature sensors and other equipment can be used to ensure the mold temperature remains within a suitable range. Based on actual conditions, parameters such as water flow rate and water temperature in the cooling system are adjusted to achieve optimal cooling.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A die-casting anti-deformation mold, comprising a mold body (1), characterized in that: A mold core (2) is fitted inside the mold body (1). Both ends of the mold core (2) are fixed with locking blocks (3). A fixing mechanism (4) is rotatably installed inside the mold body (1). The fixing mechanism (4) includes a rotating block (401) and a lead screw (402). The lead screw (402) is rotatably installed inside the mold body (1). The rotating block (401) is fixedly connected to the lead screw (402). A stop block (403) is threadedly connected to the lead screw (402). A slide rod (404) abuts against the stop block (403). The slide rod (404) is slidably connected to the mold body (1). A telescopic spring (405) is sleeved on the slide rod (404). An insert block (406) is fixedly installed on the slide rod (404). The insert block (406) is engaged with the locking block (3).

2. The die-casting anti-deformation mold according to claim 1, characterized in that: The insert (406) is slidably connected to the mold body (1), and the part of the locking block (3) that contacts the insert (406) is set with an inclined structure, and the locking block (3) is engaged with the mold body (1).

3. The die-casting anti-deformation mold according to claim 1, characterized in that: The diameter of the slide rod (404) near the telescopic spring (405) is larger than the diameter of the telescopic spring (405), and the slide rod (404) near the abutment (403) is set with an inclined structure.

4. The die-casting anti-deformation mold according to claim 1, characterized in that: The rotating block (401) is located at one end of the lead screw (402) near the mold body (1), the abutment block (403) is slidably connected to the mold body (1), and the part of the abutment block (403) that contacts the slide rod (404) is also set with an inclined structure.

5. The die-casting anti-deformation mold according to claim 1, characterized in that: The card block (3) is provided with two symmetrical slots (6), and the slots (6) are fitted with inserts (406).

6. The die-casting anti-deformation mold according to claim 1, characterized in that: The mold body (1) is connected to a cooling mechanism (5). The cooling mechanism (5) includes a connector (501) and a water pipe (502). The connector (501) is threaded on both sides of the mold body (1), and the water pipe (502) is fixedly installed on the connector (501).

7. The die-casting anti-deformation mold according to claim 6, characterized in that: The cooling mechanism (5) also includes a cold water tank (503). The cold water tank (503) is provided at the part of the mold body (1) near the mold core (2). The cold water tank (503) is arranged in a meandering pipe-like structure.

8. The die-casting anti-deformation mold according to claim 6, characterized in that: The cooling mechanism (5) also includes a water inlet (504). The mold body (1) is provided with a water inlet (504) near the connector (501), and the water inlet (504) is connected to the cold water tank (503).

Images