Quick change device and method for point cooling in die-casting die

Abstract

The invention discloses a quick change device and method for point cooling in a die-casting die, and belongs to the technical field of high-pressure casting, a point cooling mechanism comprises a core needle and an inner cooling pipe, the inner cooling pipe is coaxially arranged in the core needle, and the two ends of the core needle are connected with a mounting groove and a cavity respectively. The driving mechanism comprises a power component and a moving component, the moving component is arranged in the mounting groove, a quick-change connector is arranged at the end, facing the inner cooling pipe, of the moving component, and the quick-change connector is detachably connected with the end of the inner cooling pipe. And a cooling pipeline is arranged in the moving component and is communicated with the inner cooling pipe. The invention further discloses a corresponding quick change method. According to the quick change device and method for point cooling in the die-casting die, under the state that the die does not need to be lifted open, the whole point cooling structure can be conveniently disassembled, and the leakage position of a point cooling pipe structure can be conveniently replaced and maintained; therefore, the maintenance efficiency of the point cooling structure is remarkably improved while the maintenance process of the point cooling structure is simplified.

Description

Technical Field

[0001] The invention belongs to the technical field of high-pressure casting, and in particular relates to a quick-change device and method for spot cooling inside a die-casting mold. Background Art

[0002] As one of the important technical means for workpiece preparation, high-pressure casting is widely used in various technical fields of production and preparation due to its wide range of applications, low workpiece preparation cost, and batch and reusable characteristics.

[0003] In the field of high-pressure casting technology, for specific parts of the mold, it is necessary to quickly cool the local high-temperature areas during the die-casting process, that is, to spot cool the core and the slider. This can not only accurately control the solidification order of the molten metal and avoid the occurrence of defects such as shrinkage cavities or shrinkage, but also reduce the local high temperature of the workpiece, thereby reducing the thermal stress inside the casting, reducing the risk of workpiece deformation and cracking, and can also make the casting surface smoother and reduce surface defects.

[0004] In the related art, spot cooling of die-casting parts is usually achieved by a spot cooling structure set on the mold. The spot cooling tube of the spot cooling structure is usually fixed to the mold by threaded fitting. If the spot cooling structure is damaged, resulting in mold leakage, in the process of replacing and repairing the spot cooling structure, it is usually necessary to first lift the mold open, and then the entire spot cooling structure needs to be disassembled from the mold. Therefore, the fault repair process in the related art is relatively complicated, and the repair efficiency of the spot cooling structure repaired in this way is also low. Summary of the invention

[0005] In response to one or more of the above-mentioned defects or improvement needs in the prior art, the present invention provides a quick-change device and method for spot cooling inside a die-casting mold, which can not only realize the convenient dismantling of the entire spot cooling structure without lifting the mold, but also realize the convenient replacement and maintenance of the leakage position of the spot cooling pipe structure, thereby simplifying the maintenance process of the spot cooling structure and significantly improving the maintenance efficiency of the spot cooling structure.

[0006] To achieve the above object, the present invention provides a quick-change device for spot cooling inside a die casting mold, which is arranged on a mold frame, and a mold cavity is arranged on one end surface of the mold frame; a mounting groove is arranged on the end surface of the mold frame away from the mold cavity; the quick-change device is installed in the mounting groove; The quick-change device includes a driving mechanism and a spot cooling mechanism; The spot cooling mechanism comprises a core needle and an inner cooling tube, wherein the inner cooling tube is coaxially arranged inside the core needle, one end of the core needle is arranged on the bottom surface of the mounting groove, and the other end of the core needle penetrates the mold frame until it reaches the mold cavity; The driving mechanism comprises a power component and a moving component, wherein the moving component is arranged in the mounting groove, and a quick-change joint is arranged at the end of the moving component facing the inner cooling tube, and the quick-change joint is detachably connected to the end of the inner cooling tube; the power component cooperates with the moving component to drive the moving component to move; At least one cooling pipe is arranged in the moving component, and the cooling pipe is communicated with the inner cooling pipe and is used for introducing a cooling medium into the inner cooling pipe.

[0007] As a further preferred embodiment of the present invention, a gear pair is provided between the power component and the motion component, a gear is provided at the rotating end of the power component, and the motion component includes a rack meshing with the gear.

[0008] As a further preferred embodiment of the present invention, the moving component is slidably fitted with the mounting groove.

[0009] As a further preferred embodiment of the present invention, the moving component further includes a mounting base slidably connected to the mounting groove, and the rack is slidably disposed on the mounting base.

[0010] As a further preferred embodiment of the present invention, the quick-change connector is a trumpet-shaped ring structure, and a plurality of notches are provided on the large-diameter end of the trumpet-shaped ring structure along the circumferential direction.

[0011] As a further preferred embodiment of the present invention, an annular force equalizing ring is provided on the large diameter end of the quick-change connector, an abutment groove is formed on the force equalizing ring, and the large diameter end of the quick-change connector abuts in the abutment groove.

[0012] As a further preferred embodiment of the present invention, the small diameter end of the quick-change connector abuts against the mounting base, and a U-shaped barb is provided at the end of the rack facing the cavity, and the U-shaped barb is configured as follows: the U-shaped barb abuts against or disengages from the force equalizing ring as the rack moves.

[0013] As a further preferred embodiment of the present invention, the cooling pipeline includes an injection pipeline and a return pipeline, the injection pipeline is connected to the internal cooling pipe, and the return pipeline is used for exporting the high-temperature cooling medium.

[0014] As a further preferred embodiment of the present invention, a mounting shell is arranged in the mounting groove, and a detachable cover plate is arranged on the end surface of the mounting shell facing away from the cavity.

[0015] The present invention also discloses a quick-change method for spot cooling inside a die casting mold, which is used for replacing spot cooling inside a die casting mold, and is implemented by using the quick-change device for spot cooling inside a die casting mold, and comprises the following steps: The power component drives the moving component to move away from the cavity until the quick-change connector is separated from the end of the inner cooling tube; Taking the driving mechanism out of the installation slot and replacing the moving component; Reinstalling the replaced moving component into the installation groove; The power component drives the moving component to move toward the cavity until the quick-change connector is re-engaged with the end of the inner cooling tube.

[0016] In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects: (1) The quick-change device for spot cooling inside the die-casting mold of the present invention comprises a driving mechanism and a spot cooling mechanism. The spot cooling mechanism comprises a core needle and an inner cooling tube. The inner cooling tube is coaxially arranged inside the core needle. One end of the core needle is arranged on the bottom surface of the mounting groove, and the other end of the core needle penetrates the mold frame until it reaches the mold cavity. The driving mechanism comprises a power component and a moving component. The moving component is arranged in the mounting groove, and a quick-change joint is arranged at the end of the moving component facing the inner cooling tube. The quick-change joint is detachably connected to the end of the inner cooling tube. A cooling pipe is arranged inside the moving component, and the cooling pipe is connected to the inner cooling tube. The quick-change device can not only realize the convenient dismantling of the entire spot cooling structure without lifting the mold, but also complete the convenient replacement and maintenance of the leakage position of the spot cooling tube structure, thereby simplifying the maintenance process of the spot cooling structure and significantly improving the maintenance efficiency of the spot cooling structure.

[0017] (2) The quick-change device for spot cooling inside the die-casting mold of the present invention adopts a quick-change joint with a trumpet-shaped ring structure and cooperates with a plurality of notches set at the large-diameter end of the quick-change joint, so that the quick-change joint can compress the outer wall of the inner cooling tube through the outward-flipping clamping plate of the trumpet-shaped ring structure during the movement of the mounting base, thereby completing the quick connection between the inner cooling tube and the moving component. At the same time, through the force-equalizing ring set at the end of the quick-change joint facing the cavity and the U-shaped barb set on the rack, the force transmitted by the power component can be evenly applied to the outward-flipping clamping plate through the force-equalizing ring, ensuring that the outward-flipping clamping plate can be deformed under the action of the force-equalizing ring, so that the quick-change joint can be quickly disassembled from the inner cooling tube, providing convenience for the replacement of the spot cooling structure.

[0018] (3) The quick-change device and method for spot cooling inside the die-casting mold of the present invention have a simple structure, stable operation, and convenient replacement. It uses a trumpet-shaped quick-change joint to achieve a detachable connection between the inner cooling tube and the end of the moving component, and ensures that the injection hole in the inner cooling tube can form a stable and accurate connection with the cooling pipe on the moving base, thereby ensuring that the cooling medium can be continuously and stably transmitted from the cooling pipe to the cooling return chamber, and then ensuring the spot cooling effect of the entire core on the die-casting. At the same time, the present application opens an installation groove on the end face of the mold frame away from the mold cavity, and provides an installation shell for accommodating the drive mechanism in the installation groove, so that the staff can directly repair and replace the spot cooling device from the outside of the mold frame without lifting the mold frame during the repair of the spot cooling structure, thereby improving the repair and replacement efficiency of the spot cooling structure, and has good application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the driving mechanism and spot cooling mechanism of the quick-change device for spot cooling inside the die-casting mold in an embodiment of the present invention; Figure 2 Schematic diagram of a mold frame, a driving mechanism and a spot cooling mechanism of a quick-change device for spot cooling inside a die-casting mold according to an embodiment of the present invention; Figure 3 is a top view of a quick-change device for spot cooling inside a die-casting mold according to an embodiment of the present invention; Figure 4 yes Figure 3 Sectional view at AA; Figure 5 yes Figure 3 Cross-sectional view at BB; Figure 6 yes Figure 5 A partial enlarged view of point Ⅰ in the middle.

[0020] In all the drawings, the same reference numerals represent the same technical features, specifically: 1. mold frame; 101. mounting housing; 102. cover plate; 103. clamping ring; 104. first T-shaped slide groove; 2. driving mechanism; 201. connecting rod; 202. gear; 3. Spot cooling mechanism; 301. Rack; 302. Second T-shaped slider; 303. U-shaped barb; 304. Mounting base; 305. First T-shaped slider; 306. Second T-shaped slide; 307. First stepped hole; 308. Injection channel; 309. Return channel; 310. Quick-change connector; 311. Equalizing ring; 312. Internal cooling tube; 313. Injection hole; 314. Return hole; 4. Core needle; 401. Cooling reflux chamber. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] Example: See also Figures 1 to 6 The quick-change device and method for spot cooling inside the die-casting mold in the preferred embodiment of the present invention can not only realize the convenient dismantling of the entire spot cooling structure without lifting the mold, but also realize the convenient replacement and maintenance of the leakage position of the spot cooling pipe structure, thereby simplifying the maintenance process of the spot cooling structure and significantly improving the maintenance efficiency of the spot cooling structure.

[0027] Specifically, if Figures 1 to 6 As shown in , in a preferred embodiment of the present application, the quick-change device for spot cooling in the die-casting mold is arranged on the mold frame 1. Preferably, the mold frame 1 is a movable mold frame 1 or a fixed mold frame 1. A cavity is arranged on one end face of the mold frame 1. At the same time, a mounting groove is arranged on the end face of the mold frame 1 away from the cavity. The notch of the mounting groove is arranged on the end face of the mold frame 1. Accordingly, the quick-change device is installed in the mounting groove. In actual use, if the spot cooling in the die-casting mold fails, there is no need to separate the movable mold and the fixed mold. The spot cooling in the die-casting mold can be directly replaced from the mounting groove of the mold frame 1 away from the cavity, thereby simplifying the replacement process of the spot cooling in the die-casting mold and improving the replacement efficiency.

[0028] Furthermore, the quick-change device includes a driving mechanism 2 and a spot cooling mechanism 3, wherein the spot cooling mechanism 3 includes a core needle 4 and an inner cooling tube 312, wherein the inner cooling tube 312 is coaxially arranged in the core needle 4, and one end of the core needle 4 is arranged on the bottom surface of the mounting groove, and the other end of the core needle 4 penetrates the mold frame 1 until it is connected to the cavity. In actual use, the inner cooling tube 312 circulates the cooling medium to reduce the temperature of the core needle 4, and at the same time, the temperature of the corresponding position of the die casting in the cavity is quickly reduced through the core needle 4, thereby achieving spot cooling of the die casting.

[0029] Furthermore, the driving mechanism 2 includes a power component and a moving component, wherein the moving component is arranged in the installation groove, and a quick-change joint 310 is provided at the end of the moving component facing the internal cooling tube 312, and at least one cooling channel is provided in the moving component. During actual use, the quick-change joint 310 provided at the end of the moving component is buckled on the internal cooling tube 312, so that the cooling pipe can be connected to the internal cooling tube 312, and then the cooling medium in the cooling pipe can reduce the temperature of the core needle 4.

[0030] During the actual use of the spot cooling mechanism 3, leakage usually occurs due to damage to the connection between the cooling channel and the internal cooling tube 312. During the replacement of the cooling channel, the detachable connection of the quick-change connector 310 can conveniently separate the connection between the cooling pipe and the internal cooling tube 312, thereby facilitating the repair of leakage of the spot cooling structure.

[0031] It is worth noting that in the preferred embodiment of the present application, the mounting groove is in the shape of a cuboid, the length direction of the cuboid is the first direction, the width direction of the cuboid is the second direction, and the height direction of the cuboid is the third direction. Preferably, the inner cooling tube 312 and the core needle 4 both extend along the third direction.

[0032] Furthermore, in a preferred embodiment of the present application, a gear pair is arranged between the power component and the moving component. Specifically, a gear 202 is arranged on the rotating end of the power component. Correspondingly, the moving component includes a rack 301, which cooperates with the gear 202 on the moving end. Preferably, the rack 301 is coaxially arranged with the core needle 4 along the third direction, so that the power component can drive the moving component to reciprocate along the third direction.

[0033] Further preferably, in the preferred embodiment of the present application, the moving component also includes a mounting base 304. Preferably, the mounting base 304 is slidably arranged on the side wall surface of the mounting groove, and a quick-change joint 310 is arranged at the end of the mounting base 304 facing the core needle 4. Specifically, a first T-shaped slider 305 is arranged on the side wall surface of the mounting base 304, and correspondingly, a first T-shaped slide 104 adapted to the first T-shaped slider 305 is arranged on the side wall surface of the mounting groove. Preferably, one end of the first T-shaped slide 104 extends along the third direction until the end of the first T-shaped slide 104 is located at the notch position of the mounting groove, so that when the quick-change joint 310 arranged on the end of the mounting base 304 fails, the staff can conveniently replace the mounting base 304 along the first T-shaped slide 104, which significantly improves the repair efficiency of spot cooling leakage.

[0034] In more detail, in a preferred embodiment of the present application, a first stepped hole 307 is provided on the side of the mounting base 304 facing the core needle 4, and the first stepped hole 307 includes a large diameter section and a small diameter section, wherein a quick-change connector 310 with a trumpet-shaped annular structure is embedded in the large diameter section, and preferably, the outer wall surface of the small diameter section of the quick-change connector 310 abuts against the inner wall surface of the large diameter section of the first stepped hole 307, and accordingly, the large diameter end of the quick-change connector 310 is a trumpet section, one end of the trumpet section is fixed on the inner side of the small diameter section of the quick-change connector 310, and the trumpet section gradually extends out of the first stepped hole 307 along a third direction.

[0035] Further preferably, a plurality of notches are provided at circumferential intervals on the horn section, and a plurality of outward-folding clamping plates are further formed on the horn section at circumferential intervals. During actual use, the quick-change connector 310 gradually abuts against the outer wall of the inner cooling tube 312. At this time, the outward-folding clamping plate is deformed to clamp the outer wall of the inner cooling tube 312, thereby fixing the position of the inner cooling tube 312.

[0036] Preferably, a hook extending in the radial direction is provided at the end of the outward-turned clamping plate facing the core needle 4 .

[0037] Further preferably, an annular sealing ring is provided between the quick-change connector 310 and the large-diameter section of the stepped opening.

[0038] Further, in the preferred embodiment of the present application, a rack 301 extending along the third direction is slidably provided on the end surface of the mounting base 304 away from the first T-shaped slide groove 104. Specifically, a second T-shaped slide groove 306 is provided on the end surface of the mounting base 304 away from the first T-shaped slide groove 104, and a second T-shaped slider 302 is provided on the end surface of the rack 301 facing the mounting base 304. Preferably, the length of the second T-shaped slider 302 along the third direction is less than the length of the second T-shaped slide groove 306 along the third direction.

[0039] Further preferably, in the preferred embodiment of the present application, the moving component also includes a force equalizing ring 311, which is annular in shape. Accordingly, an abutment groove is provided on the force equalizing ring 311. At the same time, the annular side wall surface of the abutment groove extending along the third direction abuts against the outer wall surface of the large diameter end of the first step hole 307, and the bottom of the abutment groove along the third direction abuts against the end of the hook claw.

[0040] In more detail, in the preferred embodiment of the present application, at least one U-shaped barb 303 is provided at the end of the rack 301 facing the core needle 4, and the ends of each U-shaped barb 303 abut against the force equalizing ring 311. In actual use, the power component drives the rack 301 to move, so that the U-shaped barb 303 abuts against the upper hook force equalizing ring 311, and the groove bottom of the force equalizing ring 311 abuts and lifts the hook claw, so that the hook claw extends outward and deforms, releasing the clamping of the horn section on the side wall of the inner cooling tube 312, thereby facilitating the removal between the inner cooling tube 312 and the moving component.

[0041] Furthermore, in a preferred embodiment of the present application, in order to ensure that the U-shaped barb 303 can abut against the force equalizing ring 311, the distance between the bottom end surface of the U-shaped barb 303 and the bottom end surface of the force equalizing ring 311 is less than the length between the second T-shaped slider 302 groove and the second T-shaped slider 302 along the third direction, so as to ensure that the claw of the U-shaped barb 303 can abut against the force equalizing ring 311 when the rack 301 slides to the end of the second T-shaped slot 306 along the third direction, so that the gear 202 at the end of the power component can drive the rack 301 to move, thereby cutting off the claw of the U-shaped barb and the force equalizing ring 311, driving the force equalizing ring 311 to lift the quick-change connector 310, so that the quick-change connector 310 is separated from the outer wall surface of the inner cooling tube 312, so as to realize convenient disassembly of the quick-change connector 310 and the inner cooling tube 312.

[0042] Further preferably, in the preferred embodiment of the present application, the cooling pipe includes an injection channel 308, and accordingly, an injection hole 313 connected to the injection channel 308 is arranged on the inner cooling tube 312. At the same time, a blind hole is arranged along a third direction in the core needle 4, and the inner cooling tube 312 is coaxially arranged in the blind hole of the core needle 4. The injection hole 313 of the inner cooling tube 312 is connected to the blind hole of the core needle 4, and there is a certain gap between the outer wall surface of the inner cooling tube 312 and the inner wall surface of the blind hole, so that the cooling medium flowing out of the inner cooling tube 312 can flow and fill the entire blind hole of the core needle 4, thereby realizing cooling of the entire core needle 4.

[0043] In more detail, in the preferred embodiment of the present application, the inner cooling tube 312 is in the shape of a stepped shaft as a whole. Accordingly, a second stepped hole corresponding to the inner cooling tube 312 is provided in the core needle 4 along the third direction. Specifically, the large diameter end of the inner cooling tube 312 is embedded in the large diameter end of the second stepped hole provided on the core needle 4. Preferably, the large diameter end of the inner cooling tube 312 is sealed and abutted against the large diameter end of the second stepped hole provided on the core needle 4. The small diameter end of the inner cooling tube 312 is completely embedded in the small diameter end of the second stepped hole provided on the core needle 4, and a cooling reflux chamber 401 is formed between the small diameter end of the inner cooling tube 312 and the outer wall surface of the second stepped hole provided on the inner cooling tube 312.

[0044] Furthermore, in a preferred embodiment of the present application, a reflux hole 314 is also provided at the large diameter end of the inner cooling tube 312. The reflux hole 314 extends along a third direction through the large diameter end of the inner cooling tube 312, so that the two ends of the reflux hole 314 are connected to the first stepped hole 307 and the reflux chamber, respectively. In actual use, the cooling medium flows out from the cooling channel, and is injected into the reflux chamber after passing through the injection hole 313, so as to ensure that the reflux chamber can be filled with sufficient cooling medium. During the continuous spot cooling of the die casting by the core needle 4, the temperature of the cooling medium rises, and the heated cooling medium flows from the reflux hole 314 into the first stepped hole 307, thereby forming a cooling medium circulation loop, thereby ensuring that the temperature of the core needle 4 can be kept relatively stable during the entire spot cooling process of the die casting.

[0045] Further preferably, in the preferred embodiment of the present application, a plurality of cooling pipes penetrating the side wall of the mounting base 304 are arranged at the small diameter end of the first stepped hole 307 along the first direction or the second direction, and the cooling pipes are connected with the inner cooling pipe 312 to ensure that the cooling medium in the cooling pipe can flow into the inner cooling pipe 312. Specifically, the cooling pipe includes an injection channel 308 and a return channel 309, wherein the injection channel 308 is an L-shaped pipe, one end of the L-shaped pipe extends along the first direction and penetrates the side wall of the mounting base 304, and the other end of the L-shaped pipe is located in the first stepped hole 307, and extends along the third direction until it is connected with the injection hole 313.

[0046] In more detail, in a preferred embodiment of the present application, a groove extending from a third direction is provided on the large diameter end of the internal cooling tube 312. At the same time, in the groove, a hollow tube body is provided at the end of the injection hole 313, and the hollow tube body is embedded in the injection channel 308. Preferably, the outer wall surface of the hollow tube body is abutted and sealed against the inner wall surface of the injection channel 308 to improve the sealing performance of the connection between the two.

[0047] Further, in the preferred embodiment of the present application, the return channel 309 also extends along the first direction, and the return channel 309 also penetrates the side wall surface of the mounting base 304, so that the return channel 309 can be connected to the first stepped hole 307. Correspondingly, in the groove of the inner cooling tube 312, the return hole 314 extends along the third direction, so that the return hole 314 can be connected to the bottom end surface of the groove and the cooling return chamber 401, ensuring that the high-temperature cooling medium with a higher temperature can flow from the return chamber into the first stepped hole 307 through the return hole 314, and the high-temperature cooling medium in the first stepped hole 307 flows out from the return channel 309.

[0048] Further preferably, in the preferred embodiment of the present application, the core needle 4 is embedded in the bottom end surface of the mounting groove, and at the same time, a clamping ring 103 is provided on the large diameter end of the core needle 4, and the clamping ring 103 abuts against the top end surface of the core needle 4, and is used to fix the core needle 4 on the bottom end surface of the mounting groove. Preferably, the clamping ring 103 is threadedly fixed on the bottom end of the mounting groove.

[0049] Further, in a preferred embodiment of the present application, the power component further includes a connecting rod 201 and a rotating motor, one end of the connecting rod 201 is fixedly connected to the output shaft of the rotating motor, the other end of the connecting rod 201 extends along the first direction to form a rotating end, and the rotating end is provided with a gear 202. Preferably, the connecting rod 201 includes a first rod body and a second rod body, and the first rod body and the second rod body are hinged or detachably connected, so that in the process of replacing the mounting base 304, the influence of the connecting rod 201 on the replacement of the mounting base 304 can be avoided.

[0050] Further, in the preferred embodiment of the present application, a mounting housing 101 is provided in the mounting groove, and the drive mechanism 2 is installed in the mounting housing 101. Preferably, a detachably connected cover plate 102 is provided at the end of the mounting housing 101 away from the cavity to facilitate replacement and maintenance of the spot cooling structure.

[0051] Furthermore, in a preferred embodiment of the present application, a quick-change method for spot cooling inside a die casting mold is also disclosed, which is implemented by using the quick-change device for spot cooling inside a die casting mold, and specifically includes the following steps: The power component drives the moving component to move away from the cavity until the quick-change connector 310 is separated from the end of the internal cooling tube 312.

[0052] Take out the driving mechanism 2 from the installation slot and replace the moving component.

[0053] Reinstall the replaced moving component into the mounting slot.

[0054] The power component drives the moving component to move toward the cavity until the quick-change connector 310 is reconnected to the end of the inner cooling tube 312 .

[0055] The quick-change device and method for spot cooling inside the die casting mold of the present invention has a simple structure, stable operation, and convenient replacement. It uses a trumpet-shaped quick-change joint 310 to achieve a detachable connection between the inner cooling tube 312 and the end of the moving component, and ensures that the injection hole 313 in the inner cooling tube 312 can form a stable and accurate connection with the cooling pipe on the moving base, thereby ensuring that the cooling medium can be continuously and stably transmitted from the cooling pipe to the cooling return chamber 401, and then guaranteeing the spot cooling effect of the entire core needle 4 on the die casting. At the same time, the present application provides an installation groove on the end face of the mold frame 1 away from the mold cavity, and provides an installation shell 101 for accommodating the drive mechanism 2 in the installation groove, so that the staff can directly repair and replace the spot cooling device from the outside of the mold frame 1 during the repair of the spot cooling structure without lifting the mold frame 1, thereby improving the repair and replacement efficiency of the spot cooling structure, and has good application prospects and promotion value.

[0056] It will be easily understood by those skilled in the art that the above description is only 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 in the protection scope of the present invention.

Claims

1. A quick-change device for spot cooling inside a die-casting mold, which is arranged on a mold frame, and a mold cavity is arranged on one end surface of the mold frame; characterized in that: The mold frame is provided with a mounting groove on the end surface facing away from the mold cavity; the quick-change device is installed in the mounting groove; The quick-change device includes a driving mechanism and a spot cooling mechanism; The spot cooling mechanism comprises a core needle and an inner cooling tube, wherein the inner cooling tube is coaxially arranged inside the core needle, one end of the core needle is arranged on the bottom surface of the mounting groove, and the other end of the core needle penetrates the mold frame until it reaches the mold cavity; The driving mechanism comprises a power component and a moving component, wherein the moving component is arranged in the mounting groove, and a quick-change joint is arranged at the end of the moving component facing the inner cooling tube, and the quick-change joint is detachably connected to the end of the inner cooling tube; the power component cooperates with the moving component to drive the moving component to move; At least one cooling pipe is arranged in the moving component, and the cooling pipe is communicated with the inner cooling pipe and is used for introducing a cooling medium into the inner cooling pipe.

2. The quick-change device for spot cooling inside the die casting mold according to claim 1, wherein: A gear pair is arranged between the power component and the motion component, a gear is arranged at the rotating end of the power component, and the motion component includes a rack meshing with the gear.

3. The quick-change device for spot cooling inside the die casting mold according to claim 2, wherein: The moving component is slidably matched with the mounting groove.

4. The quick-change device for spot cooling inside the die casting mold according to claim 3, wherein: The moving component also includes a mounting base slidably connected to the mounting groove, and the rack is slidably arranged on the mounting base.

5. The quick-change device for spot cooling inside the die casting mold according to claim 4, wherein: The quick-change connector is a trumpet-shaped ring structure, and a plurality of notches are provided along the circumferential direction on the large-diameter end of the trumpet-shaped ring structure.

6. The quick-change device for spot cooling inside the die casting mold according to claim 5, wherein: An annular force equalizing ring is arranged on the large diameter end of the quick-change joint, and an abutment groove is opened on the force equalizing ring. The large diameter end of the quick-change joint abuts in the abutment groove.

7. The quick-change device for spot cooling inside the die casting mold according to claim 6, wherein: The small diameter end of the quick-change connector abuts against the mounting base, and a U-shaped barb is provided at the end of the rack facing the cavity. The U-shaped barb is configured as follows: the U-shaped barb abuts against or disengages from the force equalizing ring as the rack moves.

8. The quick-change device for spot cooling inside a die casting mold according to any one of claims 1 to 7, wherein: The cooling pipeline includes an injection pipeline and a return pipeline. The injection pipeline is connected to the inner cooling pipe, and the return pipeline is used for leading out the high-temperature cooling medium.

9. The quick-change device for spot cooling inside a die casting mold according to any one of claims 1 to 7, wherein: An installation shell is arranged in the installation groove, and a detachable cover plate is arranged on the end surface of the installation shell facing away from the cavity.

10. A quick-change method for spot cooling inside a die casting mold, used for replacing spot cooling inside a die casting mold, characterized in that: The method is implemented by using a quick-change device for spot cooling inside the die casting mold according to any one of claims 1 to 9, which comprises the following steps: The power component drives the moving component to move away from the cavity until the quick-change connector is separated from the end of the inner cooling tube; Taking the driving mechanism out of the installation slot and replacing the moving component; Reinstalling the replaced moving component into the installation groove; The power component drives the moving component to move toward the cavity until the quick-change connector is re-engaged with the end of the inner cooling tube.

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