Die-casting die facilitating demolding of thin-wall die casting
By providing a channel structure and a pulsed fluid injection mechanism on the moving or fixed die of the die casting mold, the vibration impact technology of fluid injection is used to solve the problems of adhesion, large resistance and deformation of thin-walled die castings during the mold release process, and higher processing accuracy and product quality are achieved.
Patent Information
- Application Number
- CN202421551020.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-03
AI Technical Summary
Thin-wall die-casting parts are prone to stick, have large mold release resistance, and are prone to bend and deform during the demolding process, which affects the processing accuracy.
A die-casting mold including a moving die and a fixed die is designed. A channel structure is provided on the moving die or a fixed die. The channel structure includes a through hole, a fluid delivery hole and an air guide groove. The fluid is ejected through a pulsed fluid injection mechanism, and the thin-walled die-casting parts are vibrated to effectively separate them from the cavity surface.
Through the vibration impact of pulsed fluid injection, the effective separation of thin-walled die castings and the cavity surface avoids plastic deformation caused by local stress concentration, and ensures processing accuracy and product quality during mold opening.
Smart Images
Figure CN222902608U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of die-casting molds, in particular to a die-casting mold for facilitating the demolding of thin-wall die-castings. Background Art
[0002] The deformation of thin-plate die-castings is one of the technical difficulties concerned and committed to solving in the die-casting field. After die-casting, thin-plate die-castings are prone to adhesion to the cavity surface. During demolding, demolding is generally achieved through an ejection mechanism. However, thin-plate die-castings are prone to deformation under the action of the ejection pressure of the ejection mechanism, affecting the machining accuracy.
[0003] The journal literature "Measures to Prevent Deformation of Thin-Plate Die-Castings" (journal name: Foundry, author: Xue Yingjie, 1997.2) records the technical means of improving the layout of the ejection mechanism. The position of the ejector rods is changed from the original distribution on the plate surface to the bosses, casting holes, and peripheries where the internal stress of the casting is concentrated and the demolding resistance is large, and the number and diameter of the ejector rods are increased, so that the entire plate surface is evenly stressed when the casting is ejected, thereby effectively preventing and reducing ejection deformation. However, this method is not generally applicable, and there are bottlenecks in deformation control for thin-plate precision die-castings. It is very difficult to control the deformation of the plate surface with a large area and lacking a strengthening structure, and more ejection mechanisms also increase the complexity of the mold.
[0004] In order to prevent the casting from deforming due to uneven stress during ejection, the basic requirements for the casting ejection mechanism are: the ejector rods should have sufficient stiffness and be evenly distributed, and the positions of the ejector rods should not be set at the weak parts of the casting.
[0005] Therefore, how to provide a die-casting mold for facilitating the demolding of thin-wall die-castings, which can effectively peel the thin-wall die-castings from the mold cavity surface evenly, reduce the deformation amount caused by the demolding process, and thus improve the machining accuracy is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model
[0006] In view of this, the utility model provides a die-casting mold for facilitating the demolding of thin-wall die-castings, aiming to solve the technical problems of easy adhesion, large demolding resistance, and easy bending deformation during the demolding of traditional thin-wall die-castings.
[0007] In order to achieve the above object, the utility model adopts the following technical scheme:
[0008] The utility model provides a die-casting mold for facilitating the demolding of thin-wall die-castings, comprising:
[0009] A movable mold and a fixed mold, wherein the cavity surfaces of the movable mold and the fixed mold can be enclosed to form a cavity; a channel structure is provided on the movable mold or the fixed mold; the channel structure comprises a through hole opened on the outer wall of the movable mold or the fixed mold and connected to the cavity, a fluid delivery hole opened on the outer wall of the movable mold or the fixed mold and corresponding to the peripheral side of the through hole, and an air guide groove opened on the inner wall of the through hole and connected to the fluid delivery hole; the orifice of the through hole corresponding to the cavity surface of the movable mold or the fixed mold is a fluid injection port;
[0010] A demoulding mechanism, the demoulding mechanism comprising a plunger rod, an extraction and insertion drive mechanism, and a pulsed fluid injection mechanism;
[0011] One end of the plunger rod is slidingly sealed and inserted in the through hole, and its peripheral wall can block the notch of the air guide groove; the end face of one end of the plunger rod is adapted to be connected with the cavity surface of the movable mold or the fixed mold to jointly constitute the cavity surface of the cavity; the driving end of the plug-in and pull-out drive mechanism is transmission-connected to the other end of the plunger rod to drive the plunger rod to move along the axial plug-in and pull-out movement of the through hole, and can drive the peripheral wall of the plunger rod to separate from the notch of the air guide groove, so that the fluid injection port is connected with the fluid delivery hole; the fluid outlet of the pulse fluid injection mechanism is connected to the fluid delivery hole through a pipeline to supply fluid in a pulsed manner.
[0012] The utility model discloses a die-casting mold which is convenient for demoulding thin-walled die-casting parts. When the die-casting mold is used, the movable mold and the fixed mold are installed on the die-casting machine for mold closing. The end surface of one end of the plunger rod is used as a part of the cavity surface, and the cavity surfaces of the movable mold and the fixed mold are together enclosed to form a cavity for die-casting thin-walled die-casting parts for casting. When the die-casting of the thin-walled die-casting parts is completed and the mold is opened, the movable mold and the fixed mold need to be separated by a small gap first, and the plunger rod is pulled out by a plug-in driving mechanism to make it detach from the notch of the air guide groove, so that the fluid conveying hole, the air guide groove and the The through holes are interconnected, and the pulsed fluid injection mechanism supplies the fluid in a pulsed manner and ejects the fluid from the fluid injection port to vibrate and impact the thin-walled die casting, so that it gradually separates from the cavity surface; the pulsed fluid can continuously extend in the tiny gap between the thin-walled die casting and the cavity surface, and achieve separation through impact vibration, so that the overall force of the thin-walled die casting is more uniform during the mold opening process, and plastic deformation caused by excessive deformation due to local stress concentration will not occur, ensuring the effective separation of the thin-walled die casting from the cavity surface when the mold is opened. After the thin-walled die casting is effectively separated from the cavity surface, the movable mold and the fixed mold are gradually and completely separated, avoiding the unfavorable situation that the thin-walled die casting is subjected to excessive and irreversible bending deformation due to the sticky film during separation.
[0013] As a further improvement of the above technical solution, the pulse fluid injection mechanism includes a high-pressure pump, a pulse valve, and a delivery pipe;
[0014] One end of the delivery pipe is connected to and communicated with the high-pressure pump output port, and the other end is connected to and communicated with the fluid delivery hole; the pulse valve is installed on the delivery pipe to generate pulse fluid through the pulse switch valve.
[0015] The beneficial effects of the above technical solution are: the high-pressure pump is used for conveying and pressurizing the fluid, and the pulse valve switches the valve in a pulsed manner to make the fluid in the conveying pipe flow in a pulsed manner.
[0016] As a further improvement of the above technical solution, the pulse fluid injection mechanism also includes a pressure relief valve, which is installed on the delivery pipe between the pulse valve and the fluid delivery hole.
[0017] The beneficial effects of the above technical solution are: the pressure relief valve in conjunction with the high-pressure pump can ensure that the pressure in the delivery pipe does not exceed the set threshold, thereby playing a protective role; and the pressure relief valve can increase the fluctuation effect of the pulsed fluid injection, thereby increasing the effect of the pulsed fluid vibration impact.
[0018] As a further improvement of the above technical solution, the plug-in and pull-out drive mechanism includes a telescopic cylinder; the cylinder body of the telescopic cylinder is fixedly mounted on the movable mold or the fixed mold, and the telescopic rod of the telescopic cylinder is transmission-connected to the other end of the plunger rod to drive the plunger rod to perform plug-in and pull-out movements.
[0019] The beneficial effect of the above technical solution is that the plugging and unplugging of the plunger rod is driven by the telescopic cylinder, which is stable and reliable.
[0020] As a further improvement of the above technical solution, there are multiple channel structures, and the multiple channel structures are distributed at intervals on the movable mold or the fixed mold;
[0021] There are multiple plunger rods and multiple plug-in and pull-out drive mechanisms; the multiple plunger rods are inserted into the through holes of the multiple channel structures one by one, and the multiple plug-in and pull-out drive mechanisms are arranged one by one corresponding to the multiple plunger rods, and their driving ends are transmission-connected to the corresponding plunger rods; the fluid outlet of the pulse fluid injection mechanism is connected to the fluid delivery holes of the multiple channel structures through a pipeline to synchronously supply the fluid.
[0022] The beneficial effect of the above technical solution is that in actual application, according to the structural characteristics of thin-walled die-casting parts, multiple channel structures and demoulding mechanisms can be arranged at different positions on the movable mold or the fixed mold to achieve a better demoulding effect.
[0023] As a further improvement of the above technical solution, a positioning baffle is mounted on the plunger rod; the positioning baffle can abut against the outer wall surface of the movable mold or the fixed mold to limit the length of the plunger rod inserted into the through hole.
[0024] The beneficial effects of the above technical solution are as follows: The positioning baffle plays a role in limiting the length of the plunger rod inserted into the through hole to ensure that the end face of the plunger rod is adaptively connected to the cavity surface of the moving die or the fixed die when the plunger rod is reset.
[0025] As can be seen from the above technical solution, compared with the prior art, the present utility model discloses a die-casting mold facilitating the demolding of thin-wall castings, having the following advantages and beneficial effects:
[0026] The present utility model arranges a channel structure and a demolding mechanism on the moving die or the fixed die, and uses the fluid pulse jet method to vibrate and impact the thin-wall casting to effectively separate it from the cavity surface; the pulsed jet fluid can continuously extend along the tiny gap between the thin-wall casting and the cavity surface, with a large acting surface and stress dispersion, and the impact vibration of the pulsed jet fluid can gradually vibrate and peel off the thin-wall casting adhered to the cavity surface; the pulse valve can control the vibration frequency and amplitude, and the high-pressure pump and the pressure relief valve can control the impact force and amplitude. Description of the Drawings
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings according to the provided drawings without creative efforts.
[0028] Figure 1 Overall structural schematic diagram of a die-casting mold facilitating the demolding of thin-wall castings according to the present utility model;
[0029] Figure 2 Internal schematic diagram of the cavity of a die-casting mold facilitating the demolding of thin-wall castings according to the present utility model;
[0030] Figure 3 Schematic diagram of the demolding mechanism of a die-casting mold facilitating the demolding of thin-wall castings according to the present utility model;
[0031] In the figure: 1, moving die; 2, fixed die; 3, cavity; 4, channel structure; 41, through hole; 411, air guide groove; 412, fluid injection port; 42, fluid delivery hole; 5, demolding mechanism; 51, plunger rod; 511, positioning baffle; 52, plug-in driving mechanism; 521, telescopic cylinder; 522, bracket; 53, pulsed fluid injection mechanism; 531, high-pressure pump; 532, pulse valve; 533, delivery pipe; 534, pressure relief valve; 535, multi-way joint. Detailed Description of the Invention
[0032] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.
[0033] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.
[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.
[0035] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0036] As Figures 1 to 3 shown, a die-casting mold facilitating the demolding of thin-wall die-castings includes:
[0037] A moving mold 1 and a fixed mold 2, the cavity surfaces of the moving mold 1 and the fixed mold 2 can enclose to form a cavity 3; a channel structure 4 is provided on the moving mold 1 or the fixed mold 2; the channel structure 4 includes a through hole 41 opened on the outer wall of the moving mold 1 or the fixed mold 2 and communicating with the cavity 3, a fluid delivery hole 42 opened on the outer wall of the moving mold 1 or the fixed mold 2 and corresponding to the periphery of the through hole 41, and a gas guiding groove 411 opened on the inner wall of the through hole 41 and communicating with the fluid delivery hole 42; the orifice of the through hole 41 corresponding to the cavity surface of the moving mold 1 or the fixed mold 2 is a fluid injection port 412;
[0038] A demolding mechanism 5, the demolding mechanism 5 includes a plunger rod 51, a plug-in driving mechanism 52, and a pulsed fluid injection mechanism 53;
[0039] One end of the plunger rod 51 is slidingly sealed and inserted into the through hole 41, and its peripheral wall can block the notch of the air guide groove 411, and its top can block the fluid injection port 412; the end face of one end of the plunger rod 51 is adapted to be connected with the cavity surface of the movable mold 1 or the fixed mold 2 to jointly constitute the cavity surface of the cavity 3; the driving end of the plug-in and pull-out driving mechanism 52 is transmission-connected to the other end of the plunger rod 51 to drive the plunger rod 51 to axially plug and pull along the through hole 41, and can drive the peripheral wall of the plunger rod 51 to separate from the notch of the air guide groove 411, so that the fluid injection port 412 is connected with the fluid delivery hole 42; the fluid outlet of the pulse fluid injection mechanism 53 is connected to the fluid delivery hole 42 through a pipeline to supply fluid in a pulsed manner.
[0040] When a die-casting mold for demolding thin-walled die-casting parts is used in this embodiment, the movable mold 1 and the fixed mold 2 are installed on the die-casting machine for mold closing, and the end surface of the plunger rod 51 is used as a part of the cavity surface, and together with the cavity surfaces of the movable mold 1 and the fixed mold 2, it encloses a cavity 3 for die-casting thin-walled die-casting parts for casting; when the die-casting of the thin-walled die-casting parts is completed and the mold is opened, the movable mold 1 and the fixed mold 2 must be separated by a small gap, and the plunger rod 51 must be pulled out of the notch of the air guide groove 411 by the plug-in drive mechanism 52, so that the fluid delivery hole 42 and the guide groove 411 are opened. The gas groove 411 and the through hole 41 are interconnected, and the pulsed fluid injection mechanism 53 supplies the fluid in a pulsed manner and ejects the fluid from the fluid injection port 412, so as to vibrate and impact the thin-walled die casting, so that it gradually separates from the cavity surface; the pulsed fluid can continuously extend in the tiny gap between the thin-walled die casting and the cavity surface, and achieve separation through impact vibration, so that the overall force of the thin-walled die casting is more uniform during the mold opening process, and plastic deformation caused by excessive deformation due to local stress concentration will not occur, ensuring the effective separation of the thin-walled die casting from the cavity surface when the mold is opened. After the thin-walled die casting is effectively separated from the cavity surface, the movable mold 1 and the fixed mold 2 are gradually and completely separated, avoiding the unfavorable situation that the thin-walled die casting is subjected to excessive and irreversible bending deformation due to the sticky film during separation.
[0041] In some embodiments, the pulse fluid injection mechanism 53 includes a high pressure pump 531, a pulse valve 532, and a delivery tube 533;
[0042] One end of the delivery pipe 533 is connected to and communicated with the output port of the high-pressure pump 531, and the other end is connected to and communicated with the fluid delivery hole 42; the pulse valve 532 is installed on the delivery pipe 533 to generate pulse fluid through a pulse switch valve.
[0043] The high-pressure pump 531 is used for conveying and pressurizing the fluid, and the pulse valve 532 enables the fluid in the conveying pipe 533 to flow in a pulsed manner by switching the valve in a pulsed manner.
[0044] In some embodiments, the pulsed fluid injection mechanism 53 further includes a pressure relief valve 534, which is installed on the delivery pipe 533 between the pulse valve 532 and the fluid delivery hole 42.
[0045] The pressure relief valve 534 cooperating with the high-pressure pump 531 can ensure that the pressure in the delivery pipe 533 does not exceed the set threshold, playing a protective role; and the pressure relief valve 534 can increase the fluctuation effect of the pulsed fluid injection, thereby increasing the effect of the pulsed fluid vibration impact.
[0046] Specifically, it further includes a controller; the pulse valve 532 is an electromagnetic pulse valve; the pressure relief valve 534 is a pressure relief valve with an adjustable pressure relief value. The high-pressure pump 531, the pulse valve 532, and the pressure relief valve 534 are all controlled by the controller.
[0047] In some embodiments, the plug-in driving mechanism 52 includes a telescopic cylinder 521; the cylinder body of the telescopic cylinder 521 is fixedly installed on the moving mold 1 or the fixed mold 2, and the telescopic rod of the telescopic cylinder 521 is drivingly connected to the other end of the plunger rod 51 to drive the plunger rod 51 to perform plug-in and unplugging movements.
[0048] Driving the plunger rod 51 to perform plug-in and unplugging through the telescopic cylinder 521 is stable and reliable.
[0049] In some embodiments, there are multiple channel structures 4, and the multiple channel structures 4 are spaced apart and distributed on the moving mold 1 or the fixed mold 2;
[0050] Both the plunger rod 51 and the plug-in driving mechanism 52 are multiple; the multiple plunger rods 51 are respectively inserted into the through holes 41 of the multiple channel structures 4, the multiple plug-in driving mechanisms 52 are arranged corresponding to the multiple plunger rods 51 one by one, and their driving ends are drivingly connected to the corresponding plunger rods 51; the fluid outlet of the pulsed fluid injection mechanism 53 is connected to the fluid delivery holes 42 of the multiple channel structures 4 through pipelines to supply fluid synchronously.
[0051] During actual application, multiple channel structures 4 and the demolding mechanism 5 can be arranged at different positions on the moving mold 1 or the fixed mold 2 according to the structural characteristics of the thin-walled die-cast parts to achieve a better demolding effect.
[0052] Specifically, the delivery pipe 533 includes a delivery main pipe and delivery branch pipes; the delivery main pipe is connected and communicated with multiple delivery branch pipes through a multi-way joint 535 to achieve the pipeline connection between the fluid outlet of the pulsed fluid injection mechanism 53 and the fluid delivery holes 42 of the channel structures 4.
[0053] In some embodiments, a positioning baffle 511 is sleeved on the plunger rod 51; the positioning baffle 511 can abut against the outer wall surface of the moving mold 1 or the fixed mold 2 to limit the length of the plunger rod 51 inserted into the through hole 41.
[0054] The positioning baffle 511 functions to limit the length of the plunger rod 51 inserted into the through hole 41, so as to ensure that the end face of the plunger rod 51 is adaptively connected to the cavity surface of the moving die 1 or the fixed die 2 when the plunger rod 51 is reset.
[0055] Specifically, the high-pressure pump 531 can be a high-pressure water pump or a high-pressure air pump. When the high-pressure pump 531 is a high-pressure water pump, its water inlet is connected to a water source. For die-castings with a cooling requirement, the water source can be a cold water source, and the die-casting can be cooled by spraying cold water while demolding.
[0056] Specifically, the telescopic cylinder 521 can be a hydraulic cylinder or an electric telescopic rod, and is fixedly installed on the outer wall of the moving die 1 or the fixed die 2 through the bracket 522. The air guide groove 411 can be an annular groove, which is convenient for processing.
[0057] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.
[0058] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.
Claims
1. A die-casting mold that facilitates demoulding of thin-walled die-casting parts, characterized in that: include: A movable mold (1) and a fixed mold (2), wherein the mold cavity surfaces of the movable mold (1) and the fixed mold (2) can enclose a mold cavity (3); a channel structure (4) is provided on the movable mold (1) or the fixed mold (2); the channel structure (4) comprises a through hole (41) provided on the outer wall of the movable mold (1) or the fixed mold (2) and connected to the mold cavity (3), a fluid delivery hole (42) provided on the outer wall of the movable mold (1) or the fixed mold (2) and corresponding to the peripheral side of the through hole (41), and an air guide groove (411) provided on the inner wall of the through hole (41) and connected to the fluid delivery hole (42); the opening of the through hole (41) corresponding to the mold cavity surface of the movable mold (1) or the fixed mold (2) is a fluid injection port (412); A demoulding mechanism (5), the demoulding mechanism (5) comprising a plunger rod (51), an insertion and extraction drive mechanism (52), and a pulsed fluid injection mechanism (53); One end of the plunger rod (51) is inserted into the through hole (41) in a sliding sealing manner, and its peripheral wall can block the notch of the air guide groove (411); the end surface of one end of the plunger rod (51) is adapted to be connected with the cavity surface of the movable mold (1) or the fixed mold (2) to form the cavity surface of the cavity (3); the driving end of the plug-in and pull-out driving mechanism (52) is drivingly connected to the other end of the plunger rod (51) to drive the plunger rod (51) to move along the axial plug-in and pull-out of the through hole (41), and can drive the peripheral wall of the plunger rod (51) to separate from the notch of the air guide groove (411), so that the fluid injection port (412) is connected to the fluid delivery hole (42); the fluid outlet of the pulse fluid injection mechanism (53) is connected to the fluid delivery hole (42) through a pipeline to supply fluid in a pulsed manner.
2. A die-casting mold for facilitating demoulding of thin-walled die-casting parts according to claim 1, characterized in that: The pulse fluid injection mechanism (53) comprises a high-pressure pump (531), a pulse valve (532), and a delivery pipe (533); One end of the delivery pipe (533) is connected to and communicated with the output port of the high-pressure pump (531), and the other end is connected to and communicated with the fluid delivery hole (42); the pulse valve (532) is installed on the delivery pipe (533) to generate pulse fluid through a pulse switch valve.
3. A die-casting mold for facilitating demoulding of thin-walled die-casting parts according to claim 2, characterized in that: The pulse fluid injection mechanism (53) further comprises a pressure relief valve (534), wherein the pressure relief valve (534) is installed on the delivery pipe (533) between the pulse valve (532) and the fluid delivery hole (42).
4. A die-casting mold for facilitating demoulding of thin-walled die-casting parts according to claim 1, characterized in that: The plug-in and pull-out driving mechanism (52) comprises a telescopic cylinder (521); the cylinder body of the telescopic cylinder (521) is fixedly mounted on the movable mold (1) or the fixed mold (2); the telescopic rod of the telescopic cylinder (521) is transmission-connected to the other end of the plunger rod (51) to drive the plunger rod (51) to perform plug-in and pull-out movement.
5. A die-casting mold for facilitating demoulding of thin-walled die-casting parts according to claim 1, characterized in that: There are a plurality of the channel structures (4), and the plurality of the channel structures (4) are distributed at intervals on the movable mold (1) or the fixed mold (2); There are multiple plunger rods (51) and multiple plug-in and pull-out drive mechanisms (52); the multiple plunger rods (51) are inserted into the through holes (41) of the multiple channel structures (4) in a one-to-one correspondence; the multiple plug-in and pull-out drive mechanisms (52) are arranged in a one-to-one correspondence with the multiple plunger rods (51), and their driving ends are transmission-connected to the corresponding plunger rods (51); the fluid outlet of the pulse fluid injection mechanism (53) is connected to the fluid delivery holes (42) of the multiple channel structures (4) through a pipeline to synchronously supply fluid.
6. A die-casting mold for facilitating demoulding of thin-walled die-casting parts according to any one of claims 1 to 5, characterized in that: The plunger rod (51) is sleeved with a positioning baffle (511); the positioning baffle (511) can abut against the outer wall surface of the movable mold (1) or the fixed mold (2) to limit the length of the plunger rod (51) inserted into the through hole (41).