A water-proof device and method for water injection in core-pulling of die casting mold

Abstract

The application discloses a water-proof device and method for core-pulling and water spraying of a die-casting mold, and belongs to the technical field of high-pressure casting. The water-proof device comprises a water-proof unit and a driving component. The water-proof unit is arranged on a first mold corresponding to a core-pulling tailstock. A blocking plane is arranged on the end face of the water-proof unit facing the core-pulling tailstock. The blocking plane is in sliding fit with the side wall surface of the core-pulling tailstock away from the first mold, and blocks the gap in the area of the core-pulling tailstock. The driving component is arranged between the first mold and the water-proof unit. The application further discloses a water-proof method for core-pulling and water spraying of a die-casting mold. The water-proof device and method for core-pulling and water spraying of a die-casting mold can be simultaneously applied to the core-pulling tailstock provided with movable core-pulling pins and fixed core-pulling pins. On the premise of ensuring the relative movement between the core-pulling pins and the core-pulling tailstock, the water-proof device and method can effectively prevent the spraying cooling water from flowing into the mold cavity from the gap between the core-pulling pins and the core-pulling tailstock during the mold cooling process.

Description

Technical Field

[0001] This invention belongs to the field of high-pressure casting technology, specifically relating to a water-blocking device and method for spraying water during die casting mold core extraction. Background Technology

[0002] High-pressure casting is a highly efficient and precise metal forming method. During the cooling and solidification process of molten aluminum injected into the mold cavity, if water is present in the mold, it can easily cause product defects as the molten aluminum enters. After each injection and product removal, spraying is used to cool the mold. During the spraying process, sometimes spray water splashes onto the core-pulling tailstock. Under the action of gravity, the water flows into the mold through the gap between the core-pulling pin and the core-pulling tailstock, causing water to drip at the core-pulling pin and other locations. This results in water droplets inside the mold, which in turn has a significant impact on the quality of the die-cast product in the cavity.

[0003] To prevent sprayed cooling water from flowing into the mold cavity from between the core-pulling pin and the core-pulling tailstock during mold cooling, existing technology typically involves filling the gap between the core-pulling pin and the core-pulling tailstock with silicone sealant. Once the sealant solidifies, it seals the gap, effectively waterproofing the mold cavity. However, using sealant to block the gap not only prevents some movable core-pulling pins that can move relative to the core-pulling tailstock from doing so, but also makes it difficult to easily replace the fixed core-pulling pin in case of breakage. This usually requires completely removing the sealant from the gap between the core-pulling pin and the core-pulling tailstock, resulting in high maintenance costs. Summary of the Invention

[0004] In view of one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides a water-blocking device and method for spraying water for core pulling in die casting molds. It can be applied to core pulling tailstocks with movable core pulling pins and fixed core pulling pins. While ensuring the relative movement between the core pulling pins and the core pulling tailstocks, it can also effectively prevent the sprayed cooling water from flowing into the mold cavity from the gap between the core pulling pins and the core pulling tailstocks during the mold cooling process, thus providing an effective guarantee for the quality of the die casting parts.

[0005] To achieve the above objectives, the present invention provides a water-blocking device for spraying water in die-casting mold core-pulling, used to block water from the gap between the core-pulling tailstock and the core-pulling pin during cooling. The core-pulling tailstock is disposed on the side wall of the first mold where a cavity is formed. The water-blocking device includes:

[0006] A water-blocking unit is provided on the first mold corresponding to the core-pulling tailstock. A blocking plane is provided on the end face of the water-blocking unit facing the core-pulling tailstock. The blocking plane slides and fits against the side wall of the core-pulling tailstock away from the first mold and blocks the area of ​​the gap located in the core-pulling tailstock.

[0007] At least one driving member is provided, each driving member being disposed between the first mold and the water-blocking unit, the driving member being configured to: drive the water-blocking unit to completely cover the side wall of the core-pulling tailstock corresponding to the gap on the core-pulling tailstock when the first mold is cooling; and drive the water-blocking unit to completely detach from the side wall of the first mold where the cavity is located when the first mold and the second mold are closed.

[0008] As a further preferred embodiment of the present invention, the first mold has a slot communicating with the cavity from the top surface along a first direction, and the core-pulling tailstock is disposed in the slot.

[0009] As a further preferred embodiment of the present invention, a core-pulling power component is provided on the top surface of the first mold, and the core-pulling motion end of the core-pulling power component is fixedly connected to the core-pulling tail seat, which is used to drive the core-pulling tail seat to reciprocate in a first direction.

[0010] As a further preferred embodiment of the present invention, the driving component includes a transmission gear, a first rack extending in a first direction, and a second rack extending in a first direction;

[0011] The first rack is disposed on the side wall of the water-proof unit facing the core-pulling tailstock; the second rack is disposed on the core-pulling tailstock, and the transmission gear meshes with the first rack and the second rack respectively, for driving the second rack to move in the opposite direction when the first rack moves.

[0012] As a further preferred embodiment of the present invention, the driving component includes a telescopic component disposed on the first mold, the telescopic end of the telescopic component being fixedly connected to the water-blocking unit, for driving the water-blocking unit to reciprocate along a first direction.

[0013] As a further preferred embodiment of the present invention, at least one water collection hole is provided on the top surface of the core-pulling tailstock for collecting water debris on the core-pulling tailstock, and at least one immersion sensor is provided at the bottom of each water collection hole for detecting whether there is cooling water in the water collection hole.

[0014] As a further preferred embodiment of the present invention, at least one guide component is provided between the water-blocking unit and the first mold, and each guide component extends along a first direction for guiding the reciprocating motion of the water-blocking unit along the first direction.

[0015] As a further preferred embodiment of the invention, the guide assembly includes one or more of a slide block or a slide roller.

[0016] As a further preferred embodiment of the present invention, the length of the blocking plane is greater than the length of the core-pulling tailstock, and the width of the blocking plane is greater than the width of the core-pulling tailstock.

[0017] The present invention also discloses a water-blocking method for spraying water for core pulling in die casting molds, which is used to prevent cooling water debris from flowing into the cavity from the gap between the core pulling tail and the core pulling pin during the cooling process of the first mold through the water-blocking unit.

[0018] The spraying cooling and water-proofing method includes the following steps:

[0019] Drive the second mold to move relative to the first mold, opening the cavity of the first mold;

[0020] Drive the core-pulling tailstock to move away from the cavity, and drive the water-blocking unit to completely cover the side wall of the core-pulling tailstock corresponding to the gap on the core-pulling tailstock;

[0021] Remove the die-cast workpiece from the cavity;

[0022] Cooling water is sprayed onto the cavity of the first mold and the cavity of the second mold to cool them down until the first mold and the second mold are cooled down to the working temperature of the mold.

[0023] The core-pulling tailstock moves toward the cavity, driving the water-blocking unit to completely detach from the side wall of the first mold;

[0024] The second mold moves relative to the first mold to close, forming a complete cavity.

[0025] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include:

[0026] (1) The water-blocking device for spraying water in die-casting mold core-pulling according to the present invention includes a water-blocking unit and a driving component. The water-blocking unit is disposed on the first mold corresponding to the core-pulling tailstock. A blocking plane is provided on the end face of the water-blocking unit facing the core-pulling tailstock. The blocking plane slides and fits against the side wall of the core-pulling tailstock away from the first mold, and blocks the area where the gap is located in the core-pulling tailstock. The driving component is disposed between the first mold and the water-blocking unit. This water-blocking device can be applied to core-pulling tailstocks with both movable and fixed core-pulling pins. While ensuring relative movement between the core-pulling pin and the core-pulling tailstock, it can also effectively prevent sprayed cooling water from flowing into the mold cavity from the gap between the core-pulling pin and the core-pulling tailstock during mold cooling.

[0027] (2) The water-blocking device for spraying water in die-casting mold core pulling according to the present invention, by bringing the side wall of the water-blocking unit facing the core-pulling base close to the side of the core-pulling tail seat, prevents water debris from flowing in from the gap between the water-blocking unit and the core-pulling tail seat. At the same time, by providing a recessed structure on the side wall of the water-blocking unit away from the core-pulling tail seat, and combining it with the raised edges provided on the three sides of the water-blocking unit except for the bottom position, the cooling water splashed onto the water-blocking unit can flow out quickly through the bottom position of the water-blocking unit, avoiding water accumulation on the side wall of the water-blocking unit.

[0028] (3) The water-blocking device and method for core-pulling spraying water in die-casting molds of the present invention has a simple structure, is convenient to use, and operates stably. It utilizes a first rack on the water-blocking unit, a second rack on the core-pulling tailstock, and a transmission gear between the first and second racks. Driven by the core-pulling drive component, the core-pulling tailstock moves in opposite directions to the water-blocking unit, ensuring that the water-blocking unit can completely leave the mold-closing side wall of the first mold when the core-pulling slider on the core-pulling tailstock forms a complete cavity, thus avoiding any impact on the mold-closing process. When the core-pulling tailstock drives the core-pulling slider out of the mold, the water-blocking unit moves in the opposite direction to block the core-pulling hole and core-pulling pin at the top surface of the core-pulling tailstock, preventing cooling water debris from splashing into the core-pulling hole during mold cooling. Simultaneously, at least one guide component between the water-blocking unit and the first mold ensures accurate reciprocating motion of the water-blocking unit along the first direction, guaranteeing the accuracy of water blocking and improving the water-blocking effect of the device. This method has high potential for widespread application and is of great value. Attached Figure Description

[0029] Figure 1 This is an exploded view of the overall structure of the water-blocking device for core-pulling and water spraying in the die-casting mold according to an embodiment of the present invention;

[0030] Figure 2 This is a structural diagram of the hidden water-proof unit of the water-proof device for core-pulling and water spraying in the die-casting mold according to an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the water-blocking device for core-pulling spraying water in the die-casting mold in the embodiment of the present invention when the core-pulling tail seat is in the core-pulling position.

[0032] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0033] 1. First mold; 2. Core-pulling tailstock; 3. Core-pulling pin; 4. Water-blocking unit; 5. First rack; 6. Second rack; 7. Transmission gear; 8. Gear bracket; 9. Core-pulling power component; 10. Core-pulling bracket; 11. Water collection hole; 12. Immersion sensor; 13. Alarm; 14. T-slot; 15. T-slide block; 16. Guide limit block; 17. Guide support rod; 18. Guide mounting hole; 19. Core-pulling slide block. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 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.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] Example:

[0040] Please see Figures 1-3 The water-blocking device and method for spraying water for core pulling in die casting molds in the preferred embodiment of the present invention can be applied to the core pulling tail seat 2 with movable core pulling pin 3 and fixed core pulling pin 3 installed. Under the premise of ensuring relative movement between the core pulling pin 3 and the core pulling tail seat 2, it can also effectively prevent cooling water from flowing into the mold cavity from the gap between the core pulling pin 3 and the core pulling tail seat 2 during the mold cooling process, thus providing effective protection for the finished quality of die casting parts.

[0041] Specifically, in a preferred embodiment of this application, the water-blocking device is disposed on the side wall of the first mold 1 where the cavity is formed, corresponding to the core-pulling tailstock 2. It is used to prevent splashed cooling water debris from flowing into the cavity through the gap between the core-pulling tailstock 2 and the core-pulling pin 3 during the cooling process of the first mold 1 using cooling water spraying. Further, the water-blocking device includes a water-blocking unit 4 and at least one driving component. The water-blocking unit 4 is disposed on the first mold 1 corresponding to the core-pulling tailstock 2. The water-blocking unit 4 has a blocking plane that slides against the side wall of the core-pulling tailstock 2 away from the first mold 1, thereby preventing cooling water debris from flowing into the cavity of the first mold 1 through the gap between the blocking plane and the core-pulling tailstock 2. Simultaneously, the core-pulling tailstock 2 is disposed in the area corresponding to the core-pulling pin 3 on the side wall of the core-pulling tailstock 2, thereby enabling the water-blocking unit 4 to prevent splashed cooling water debris from the cavity side from flowing into the cavity through the gap between the core-pulling tailstock 2 and the core-pulling pin 3.

[0042] Each drive mechanism is located between the first mold 1 and the water-blocking unit 4, driving the water-blocking unit 4 to reciprocate relative to the first mold 1 in a first direction. In actual use, when the first mold 1 is cooling, it is necessary to seal the gap between the core-pulling tailstock 2 and the core-pulling pin 3. Therefore, the drive mechanism drives the water-blocking unit 4 to move in the first direction, allowing it to completely block the side wall corresponding to the gap on the core-pulling tailstock 2, thus preventing cooling water debris from splashing into the gap between the core-pulling pin 3 and the core-pulling tailstock 2 from the side of the core-pulling tailstock 2 away from the cavity. To prevent the water-blocking unit 4 located on the cavity side of the first mold 1 from affecting the mold closing between the first mold 1 and the second mold, the drive mechanism drives the water-blocking unit 4 to move in the first direction during mold closing, until the entire water-blocking unit 4 can completely detach from the side wall of the first mold 1, allowing the first mold 1 and the second mold to close normally.

[0043] It is worth noting that, in the preferred embodiment of this application, the extension direction of the core-pulling tailstock 2 is the first direction, that is, the width direction of the core-pulling tailstock 2, and the first direction is perpendicular to the horizontal plane. The length direction of the side wall of the core-pulling tailstock 2 is the second direction, and the first direction and the second direction are perpendicular to each other in the plane containing the side wall of the core-pulling tailstock 2. At the same time, the direction perpendicular to the first direction and the second direction is the third direction.

[0044] Furthermore, in a preferred embodiment of this application, the first mold 1 is vertically disposed on a horizontal plane along a first direction, and the cavity is disposed on the side wall of the first mold 1, so that the first mold 1 and the second mold can realize the opening and closing of the first mold 1 and the second mold through relative movement in the horizontal plane.

[0045] Further preferably, in the preferred embodiment of this application, a slot communicating with the cavity is formed from the top surface of the first mold 1 along a first direction, and the core-pulling tailstock 2 is disposed in the slot. Preferably, the thickness of the core-pulling tailstock 2 in the third direction is the same as the thickness of the slot in the third direction. At the same time, the three sidewalls of the core-pulling tailstock 2 are respectively slidably attached to the sidewalls of the slot, thereby enabling the core-pulling tailstock 2 to reciprocate along the first direction in the slot. Furthermore, since the thickness of the core-pulling tailstock 2 in the third direction is the same as the thickness of the slot in the third direction, the core-pulling tailstock 2 can combine with the slot of the first mold 1 to form a complete cavity. Preferably, a core-pulling slider 19 is provided on the core-pulling tailstock 2 facing the cavity of the first mold 1. The core-pulling slider 19 is fixedly connected to the core-pulling tailstock 2, and the bottom end surface of the core-pulling slider 19 located in the first direction and facing away from the core-pulling tailstock is provided with a contoured surface similar to that of the die-casting workpiece, so that after the first mold 1 and the second mold are closed, a complete die-casting cavity can be formed by the contoured surface provided on the core-pulling slider 19. More preferably, a core-pulling hole extending along the first direction is provided on the core-pulling slider 19 corresponding to the core-pulling needle 3, so that the core-pulling needle 3 can abut against the die-casting workpiece through the core-pulling hole.

[0046] More specifically, in a preferred embodiment of this application, a core-pulling power component 9 is still provided on the top surface of the first mold 1. This core-pulling power component 9 is disposed on the top surface of the first mold 1 and is fixedly connected to the core-pulling tailstock 2 via its core-pulling moving end, thereby driving the core-pulling tailstock 2 to reciprocate within the slot along a first direction. Preferably, the core-pulling power component 9 is disposed on a core-pulling bracket 10, which is fixedly installed on the top surface of the first mold 1, enabling the core-pulling power component 9 to drive the core-pulling tailstock 2 to reciprocate relative to the first mold 1 along a first direction. More preferably, the core-pulling power component 9 is a telescopic cylinder, and the core-pulling bracket 10 is a U-shaped bracket. The two arms of the U-shaped bracket are straddling both sides of the groove on the top surface of the first mold 1, while the telescopic cylinder is fixedly installed on the top surface of the U-shaped bracket. Its telescopic end passes through the top crossbeam of the U-shaped bracket and is fixedly connected to the core-pulling tail seat 2 through a coupling, so that the core-pulling tail seat 2 can reciprocate in the groove along the first direction under the drive of the telescopic cylinder.

[0047] Furthermore, in order to achieve synchronization of the reciprocating motion of the water-blocking unit 4 and the core-pulling tailstock 2, that is, the core-pulling tailstock 2 and the water-blocking unit 4 operate in opposite directions, in the preferred embodiment of this application, the driving component includes a transmission gear 7, a first rack 5 arranged along the first direction, and a second rack 6 extending along the first direction.

[0048] The first rack 5, arranged along the first direction, is disposed on the side wall of the water-blocking unit 4 facing the core-pulling tailstock 2. Correspondingly, the second rack 6 is disposed on the side wall of the core-pulling tailstock 2 facing the water-blocking unit 4. Meanwhile, a transmission gear 7 is disposed between the first rack 5 and the second rack 6. Preferably, the transmission gear 7 is fixed on the first mold 1 by a gear bracket 8.

[0049] In actual use, since the transmission gear 7 is fixed on the first mold 1, meaning the position of the transmission gear 7 relative to the first mold 1 is fixed, when the telescopic cylinder drives the core-pulling tailstock 2 to move downwards in the first direction, the second rack 6 set on the core-pulling tailstock 2 drives the transmission gear 7 to rotate clockwise. The clockwise rotation of the transmission gear 7 meshes with the first rack 5 set on the water-blocking unit 4, thereby enabling the water-blocking unit 4 to move upwards in the first direction, thus achieving synchronous movement of the water-blocking unit 4 and the core-pulling tailstock 2. When the core-pulling tailstock 2 moves upwards in the first direction, its transmission process is the opposite of the above-described transmission process, driving the water-blocking unit 4 to move downwards in the first direction.

[0050] Further preferably, in the preferred embodiment of this application, when the core-pulling tailstock 2 moves to the cavity forming position of the first mold 1, the water-blocking unit 4 completely detaches from the side wall of the first mold 1, so that the first mold 1, the second mold, and the core-pulling tailstock 2 can form a complete cavity, thereby avoiding mold closing problems caused by the water-blocking unit 4 being located between the first mold 1 and the second mold. Preferably, when the core-pulling tailstock 2 completes core pulling in the slot, the water-blocking unit 4 completely blocks the area on the side wall of the core-pulling tailstock 2 corresponding to the gap between the core-pulling pin 3 and the core-pulling tailstock 2, thereby preventing the water-blocking unit 4 from splashing into the gap between the core-pulling tailstock 2 and the core-pulling pin 3.

[0051] More specifically, in a preferred embodiment of this application, the first rack 5 and the second rack 6 are positioned correspondingly, that is, the projections of the first rack 5 and the second rack 6 along a third direction lie on the same straight line extending along the first direction, thereby enabling the transmission gear 7 to simultaneously mesh with the first rack 5 and the second rack 6. Preferably, the second rack 6 is disposed on the top surface of the core-pulling tailstock 2, and the length of the second rack 6 along the first direction is greater than the distance between the bottom of the first rack 5 and the bottom of the water-proof unit 4.

[0052] Furthermore, the driving component is not limited to the above-described structural form. In another preferred embodiment of this application, the driving component includes a telescopic component arranged along a first direction on the first mold 1. The moving end of the telescopic component is fixedly connected to the water-blocking unit 4 to drive the water-blocking unit 4 to reciprocate along the first direction. Preferably, the driving component is disposed on the top surface of the first mold 1 to avoid the telescopic component affecting the mold closing of the first mold 1 and the second mold. More preferably, the telescopic component includes one or more of a hydraulic / pneumatic telescopic cylinder, an electric lead screw, and a worm gear.

[0053] Furthermore, in a preferred embodiment of this application, at least one guide component is provided between the water-blocking unit 4 and the first mold 1. This guide component extends along a first direction. Preferably, there are two guide components symmetrically arranged about the centerline of the water-blocking unit 4, enabling the guide components to stably guide the movement of the water-blocking unit 4. More preferably, the guide component includes one or more of a sliding block or a sliding roller.

[0054] Further preferably, in a preferred embodiment of this application, the guide assembly includes a T-shaped groove 14 disposed on the side wall of the water-blocking unit 4 facing the first mold 1 and a T-shaped slider 15 disposed on the top surface of the first mold 1. To ensure the T-shaped slider 15 can be stably mounted on the top surface of the first mold 1, a guide mounting hole 18 extending in a first direction is also provided on the top surface of the first mold 1. A guide support rod 17 extending in the first direction is disposed within the guide mounting hole 18, allowing the top of the guide support rod 17 to extend out of the guide mounting hole 18. A guide limiting block 16 is fixedly disposed on the top of the guide support rod 17 in a third direction, and the T-shaped slider 15 is disposed at one end of the guide limiting block 16 facing the water-blocking unit 4. Preferably, the T-shaped slider 15 can extend out of the side wall of the first mold 1 facing the water-blocking unit 4, thereby allowing the T-shaped slider 15 to cooperate with the T-shaped groove. Further preferably, the end of the T-shaped groove in the first direction is located on the bottom surface of the water-blocking unit 4, allowing the T-shaped slider 15 to enter the water-blocking unit 4 through the T-shaped groove.

[0055] Furthermore, in a preferred embodiment of this application, the water-proof unit 4 is a rectangular plate structure. Preferably, the side wall of the water-proof unit 4 facing away from the core-pulling tail seat 2 is recessed downwards along a third direction to form a shallow pit structure. More preferably, except for the bottom end, the recessed side wall is provided with raised edges formed by the recess, so that liquid splashed onto the water-proof unit 4 can flow out from the bottom end of the water-proof unit 4 through the recessed structure. Preferably, the recessed side wall of the water-proof unit 4 forms an inward slope, that is, the thickness of the water-proof unit 4 gradually decreases downwards along the first direction to facilitate the rapid discharge of water debris from the water-proof unit 4.

[0056] Further preferably, in a preferred embodiment of this application, at least one water collection hole 11 is provided on the top surface of the core puller tailstock 2, and at least one immersion sensor 12 is provided in the corresponding water collection hole 11. When cooling water splashed into the top surface of the core puller tailstock 2 is collected in the water collection hole 11, it can be accurately detected by the immersion sensor 12. Preferably, at least one alarm 13 is also provided, which is communicatively connected to each immersion sensor 12, and is used to sound an alarm when the immersion sensor 12 detects immersion.

[0057] More specifically, in the preferred embodiment of this application, at least one immersion sensor 12 is also provided at the gap between the core-pulling needle 3 and the core-pulling tail seat 2, so as to monitor whether water enters into the gap between the core-pulling needle 3 and the core-pulling tail seat 2.

[0058] Furthermore, in a preferred embodiment of this application, the plurality of core-pulling holes provided on the core-pulling tailstock 2 are all connected to the water collection hole 11, so that the cooling water entering from each core-pulling hole can flow into the water collection hole 11, thereby ensuring accurate detection of water immersion on the top surface of the core-pulling tailstock 2.

[0059] Furthermore, in another preferred embodiment of this application, a plurality of immersion sensors 12 are arranged in an array on the top end of the core-pulling tailstock 2 so that the presence of cooling water on the top surface of the core-pulling tailstock 2 can be directly detected by the plurality of immersion sensors 12.

[0060] Furthermore, in a preferred embodiment of this application, a water collection hole 11 and an immersion sensor 12 arranged in an array on the top surface of the core puller 2 can also be provided simultaneously.

[0061] Furthermore, in a preferred embodiment of this application, the length of the blocking plane is greater than the length of the core-pulling tailstock 2, and the width of the blocking plane is greater than the width of the core-pulling tailstock 2.

[0062] Furthermore, in a preferred embodiment of this application, a water-proofing method for spraying water during die-casting mold core pulling is also disclosed, comprising the following steps:

[0063] The second mold is driven to move relative to the first mold 1, thereby opening the cavity of the first mold 1.

[0064] The core-pulling tailstock 2 is driven to move away from the cavity, and the water-blocking unit 4 is driven to completely cover the side wall surface corresponding to the gap on the core-pulling tailstock 2.

[0065] Remove the die-cast workpiece from the cavity.

[0066] Cooling water is sprayed onto the cavity of the first mold 1 and the cavity of the second mold to cool them down until the first mold 1 and the second mold are cooled down to the working temperature of the mold.

[0067] The core-pulling tailstock 2 moves toward the cavity, driving the water-blocking unit 4 to completely detach from the side wall of the first mold 1.

[0068] The second mold moves relative to the first mold 1 to close, forming a complete cavity.

[0069] The water-blocking device and method for core-pulling spraying water in die-casting molds of the present invention has a simple structure, is convenient to use, and operates stably. It uses a first rack 5 set on the water-blocking unit 4, a second rack 6 set on the core-pulling tailstock 2, and a transmission gear 7 set between the first rack 5 and the second rack 6 to enable the core-pulling tailstock 2 to move in opposite directions with the water-blocking unit 4 under the drive of the core-pulling driving component. This ensures that when the core-pulling slider 19 set on the core-pulling tailstock 2 forms a complete cavity, the water-blocking unit 4 can completely leave the mold-closing side wall of the first mold 1, avoiding the influence of the water-blocking unit 4 on the mold-closing. When the core-pulling tailstock 2 drives the core-pulling slider 19 to exit the mold, the water-blocking unit 4 can move in the opposite direction to block the core-pulling hole and the core-pulling pin 3 at the top surface of the entire core-pulling tailstock 2, preventing cooling water debris from splashing into the core-pulling hole during the mold cooling process. Meanwhile, by setting at least one guide component between the water-blocking unit 4 and the first mold 1, the water-blocking unit 4 can accurately achieve reciprocating motion along the first direction, ensuring the water-blocking accuracy of the water-blocking unit 4 and improving the water-blocking effect of the water-blocking device, which has high promotion prospects and application value.

[0070] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A water-blocking device for spraying water during core pulling in die casting molds, used to block water from the gap between the core-pulling tailstock and the core-pulling pin during cooling, wherein the core-pulling tailstock is disposed on the side wall surface of the first mold where a cavity is formed, characterized in that, The water-proof device includes: A water-blocking unit is provided on the first mold corresponding to the core-pulling tailstock. A blocking plane is provided on the end face of the water-blocking unit facing the core-pulling tailstock. The blocking plane slides and fits against the side wall of the core-pulling tailstock away from the first mold and blocks the area of ​​the gap located in the core-pulling tailstock. At least one driving member is provided, each driving member being disposed between the first mold and the water-blocking unit, the driving member being configured to: drive the water-blocking unit to completely cover the side wall of the core-pulling tailstock corresponding to the gap on the core-pulling tailstock when the first mold is cooling; and drive the water-blocking unit to completely detach from the side wall of the first mold where the cavity is located when the first mold and the second mold are closed.

2. The water-stopping device for spraying water during die-casting mold core pulling according to claim 1, wherein, The first mold has a slot that connects to the cavity from the top surface along a first direction, and the core-pulling tailstock is disposed in the slot.

3. The water-stopping device for spraying water during die-casting mold core pulling according to claim 2, wherein, A core-pulling power component is provided on the top surface of the first mold. The core-pulling motion end of the core-pulling power component is fixedly connected to the core-pulling tail seat, and is used to drive the core-pulling tail seat to reciprocate in a first direction.

4. The water-blocking device for spraying water during die-casting mold core pulling according to claim 3, wherein, The driving component includes a transmission gear, a first rack extending in a first direction, and a second rack extending in a first direction; The first rack is disposed on the side wall of the water-proof unit facing the core-pulling tailstock; the second rack is disposed on the core-pulling tailstock, and the transmission gear meshes with the first rack and the second rack respectively, for driving the second rack to move in the opposite direction when the first rack moves.

5. The water-stopping device for spraying water during die-casting mold core pulling according to any one of claims 1 to 3, wherein, The driving component includes a telescopic component disposed on the first mold, the telescopic end of which is fixedly connected to the water-blocking unit and is used to drive the water-blocking unit to reciprocate along a first direction.

6. The water-stopping device for spraying water during die-casting mold core pulling according to any one of claims 1 to 4, wherein, At least one water collection hole is provided on the top surface of the core-pulling tailstock for collecting water debris on the core-pulling tailstock. At least one immersion sensor is provided at the bottom of each water collection hole for detecting whether there is cooling water in the water collection hole.

7. The water-stopping device for spraying water during die casting mold core pulling according to any one of claims 1 to 4, wherein, At least one guide component is also provided between the water-blocking unit and the first mold. Each guide component extends along a first direction and is used to guide the reciprocating motion of the water-blocking unit along the first direction.

8. The water-stopping device for spraying water during die casting mold core pulling according to claim 7, wherein, The guide assembly includes one or more of a slide block or a slide roller.

9. The water-stopping device for spraying water during die casting mold core pulling according to any one of claims 1 to 4 and 8, wherein, The length of the blocking plane is greater than the length of the core-pulling tailstock, and the width of the blocking plane is greater than the width of the core-pulling tailstock.

10. A water-proofing method for spraying water during die-casting mold core pulling, characterized in that, A water-blocking device for spraying water onto the die-casting mold core-pulling device as described in any one of claims 1 to 9 during the cooling process of the first mold prevents cooling water debris from flowing into the cavity from the gap between the core-pulling tailstock and the core-pulling pin. The spraying cooling and water-proofing method includes the following steps: Drive the second mold to move relative to the first mold, opening the cavity of the first mold; Drive the core-pulling tailstock to move away from the cavity, and drive the water-blocking unit to completely cover the side wall of the core-pulling tailstock corresponding to the gap on the core-pulling tailstock; Remove the die-cast workpiece from the cavity; Cooling water is sprayed onto the cavity of the first mold and the cavity of the second mold to cool them down until the first mold and the second mold are cooled down to the working temperature of the mold. The core-pulling tailstock moves toward the cavity, driving the water-blocking unit to completely detach from the side wall of the first mold; The second mold moves relative to the first mold to close, forming a complete cavity.

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