Die for die-casting metal structural part

Abstract

The invention relates to the technical field of die-casting dies, in particular to a die for die-casting a metal structural part. Comprising a female die and a male die corresponding to the female die; the concave part of the female die is matched with the convex part of the male die to form a cavity; cooling runners are arranged in the female mold and the male mold; the interior and the outer side of the cavity are connected with an exhaust hole and a material injection pipe; a first supporting mold is arranged on one side, deviating from the male mold, of the female mold in a contact manner; a first guide rod is fixedly connected to one side, deviating from the male mold, of the female mold; the first supporting mold is separated from the female mold, so that the cooling liquid in the cooling flow channel does not need to absorb heat of the first supporting mold, and similarly, the cooling liquid in the cooling flow channel does not absorb heat of the second supporting mold, so that the cooling liquid in the cooling flow channel does not absorb heat of the second supporting mold under the condition that the cooling liquid in the whole cooling flow channel absorbs less heat; and the cooling speed of the metal in the cavity is increased, so that the molten metal in the cavity can be cooled and solidified more intensively, and then the die casting efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of die casting moulds, in particular to a mould for die casting metal structural parts. Background Art

[0002] Die casting, also known as pressure casting, is a casting method that fills the mold cavity with liquid metal under high pressure and high speed conditions, and cools and forms the casting under high pressure to form the desired product. It is one of the most widely used and fastest-growing metal hot processing forming process methods in the casting process. As a component forming technology, die casting meets the requirements of product complexity, precision, lightweight, energy-saving and green in modern manufacturing, and its application field is constantly expanding.

[0003] The die-casting mold plays an important role as an important part in the die-casting process. After the male mold and the female mold are controlled to approach and contact each other, the protrusion of the male mold and the recess of the female mold form a cavity. Then the molten metal is injected into the cavity along the injection pipe under a certain pressure. The gas in the cavity is discharged along the exhaust hole along with the extrusion of the molten metal until the molten metal completely fills the cavity. Then the coolant is introduced along the cooling hole into the cooling channel inside the male mold and the female mold. The molten metal in the cavity transfers heat to the coolant in the cooling channel, so that the molten metal solidifies and forms a metal structure.

[0004] Since the male and female molds need to overcome the pressure from the flowing molten metal during the die-casting process, the male and female molds are generally set to be thicker. The thick male and female molds will not cause the cavity to deform due to pressure during the die-casting process, thereby ensuring the integrity of the cavity and improving the accuracy of the formed metal structural parts; although the thick male and female molds increase the strength of the cavity, when the coolant enters the cooling channel, other positions of the mold that are heated by the molten metal will also absorb the cold of the coolant, which causes the coolant to have a poor cooling effect on the molten metal in the cavity, affecting the die-casting efficiency. Summary of the invention

[0005] In order to make up for the shortcomings of the prior art, the present invention proposes a mold for die-casting metal structural parts. In the present invention, since the first support mold is separated from the contact with the mother mold, the coolant in the cooling channel does not need to absorb the heat of the first support mold. Similarly, the coolant in the cooling channel will not absorb the heat of the second support mold. In this way, the coolant in the overall cooling channel absorbs less heat, which accelerates the cooling speed of the metal in the cavity, so that the molten metal in the cavity can be cooled and solidified more concentratedly, thereby improving the die-casting efficiency.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the present invention is a die for die-casting metal structural parts, comprising a female die and a male die corresponding to the female die; the recessed portion of the female die is adapted to the protruding portion of the male die and forms a cavity; cooling channels are arranged inside the female die and the male die; the inside and the outside of the cavity are connected to an exhaust hole and an injection pipe; a first support die is provided in contact with the side of the female die away from the male die; a first guide rod is fixedly connected to the side of the female die away from the male die; the first guide rod penetrates the first support die and is slidably connected to the first support die; a second support die is contacted with the side of the male die away from the female die; the second support die is slidably connected to the injection pipe; a second guide rod is fixedly connected to the side of the male die away from the female die; the second guide rod penetrates the second support die and is slidably connected to the second support die; the female die is in contact with the first support die during the injection process and in a separated state during the cooling process; the male die is in contact with the second support die during the injection process and in a separated state during the cooling process.

[0007] Preferably, the shapes of the two end surfaces of the female mold are compensated for each other; the thickness of each position of the female mold is kept consistent; a side of the first supporting mold facing the female mold is in adaptive contact with a side of the female mold facing the first supporting mold; the shapes of the two end surfaces of the male mold are compensated for each other; the thickness of each position of the male mold is kept consistent; a side of the second supporting mold facing the male mold is in adaptive contact with a side of the male mold facing the second supporting mold.

[0008] Preferably, a first square sleeve is provided on the outer wall sliding sealing sleeve of the first supporting mold; the first square sleeve is fixedly connected to the edge of a side of the female mold facing away from the male mold; a first partition cavity is formed between the inner side of the first square sleeve, the side of the first supporting mold facing the female mold, and the side of the female mold facing the first supporting mold; a second square sleeve is provided on the outer wall sliding sealing sleeve of the second supporting mold; the second square sleeve is fixedly connected to the edge of a side of the male mold facing away from the female mold; a second partition cavity is formed between the inner side of the second square sleeve, the side of the second supporting mold facing the male mold, and the side of the male mold facing the second supporting mold.

[0009] Preferably, the end of the first guide rod away from the female mold is fixedly connected to the first base; the first base is provided with a first groove on a side close to the first supporting mold; the first slide is connected to the first supporting mold in a sliding seal; the first slide is fixedly connected to the first supporting mold; the first slide is connected to the first supporting mold; the first slide is connected to the first partition cavity through a first air hole on a side away from the first supporting mold; the end of the second guide rod away from the male mold is fixedly connected to the second base; the second base is provided with a second groove on a side close to the second supporting mold; the second slide is connected to the second supporting mold in a sliding seal on the second groove; the second slide is fixedly connected to the second supporting mold; the second slide is connected to the second supporting mold on a side away from the second supporting mold; the first groove and the second groove are both filled with insulating gas medium.

[0010] Preferably, the cross-section of the first groove is larger than that of the first partition cavity; the medium in the first partition cavity is pressurized when the first support mold moves away from the female mold; the cross-section of the second groove is larger than that of the second partition cavity; the medium in the second partition cavity is pressurized when the first support mold moves away from the male mold.

[0011] Preferably, the bottom of the first groove is connected to the bottom of the second groove by a hose; the hose is located directly below the female mold and the male mold; the medium pressure in the first partition cavity is consistent with that in the second partition cavity.

[0012] Preferably, the outer wall of the first supporting mold in contact with the first square sleeve is provided with a first rotating groove; the first rotating groove is connected to the first supporting mold near the female mold; a first rotating rod is arranged in the first rotating groove; the outer wall of the first rotating rod is eccentrically fixedly connected to the first eccentric disk; the first rotating rod is fixedly connected to the first gear through the first square sleeve at one end away from the first supporting mold; the first rotating rod is rotatably sealed and connected to the first square sleeve; the outer wall of the first square sleeve is fixedly connected to the motor; the motor output shaft is fixedly connected to the center of the first gear; the outer wall of the second supporting mold in contact with the second square sleeve is provided with a second rotating groove; the second rotating groove is connected to the second supporting mold near the male mold; the second rotating rod is rotatably connected in the second rotating groove; the outer wall of the second rotating rod is eccentrically fixedly connected to the second eccentric disk; the second rotating rod is fixedly connected to the second gear through the second square sleeve at one end away from the second supporting mold; the first gear and the second gear are arranged corresponding to each other; after the female mold contacts the male mold, the first gear and the second gear are meshed and transmitted; the first slide plate is connected to the bottom of the first groove by a first spring; the second slide plate is connected to the bottom of the second groove by a second spring.

[0013] Preferably, the circumferential outer wall of the first base is fixedly connected to the first electric push rod; the output shaft of the first electric push rod passes through the first base and extends into the first groove; the output shaft of the first electric push rod is slidingly and sealingly connected to the first base; the output shaft of the first electric push rod is in contact with the first slide plate near the bottom of the first groove; the output shaft of the first electric push rod can limit the first slide plate.

[0014] Preferably, the circumferential outer wall of the second base is fixedly connected to the second electric push rod; the output shaft of the second electric push rod passes through the second base and extends into the second groove; the output shaft of the second electric push rod is slidingly and sealingly connected to the second base; the output shaft of the second electric push rod is in contact with the second slide plate near the bottom of the second groove; the output shaft of the second electric push rod can limit the second slide plate.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. In the present invention, since the first support mold is separated from the contact with the mother mold, the coolant in the cooling channel does not need to absorb the heat of the first support mold. Similarly, the coolant in the cooling channel will not absorb the heat of the second support mold. In this way, the coolant in the overall cooling channel absorbs less heat, which accelerates the cooling speed of the metal in the cavity, so that the molten metal in the cavity can be cooled and solidified more concentratedly, thereby improving the die-casting efficiency.

[0017] 2. After the pressure of the gas medium in the first partition cavity of the present invention increases, it can better provide support for the side of the female mold away from the male mold, so that it can not only cut off the heat transfer between the first supporting mold and the female mold, but also ensure the support effect of the female mold during the cooling process, thereby avoiding deformation of the female mold during the metal cooling process, so that the structural parts can ensure the molding efficiency while ensuring the molding effect.

[0018] 3. In the present invention, the gas pressure in the second partition cavity is increased, so that better support can be provided for the side of the male mold away from the female mold. In this way, the heat transfer between the second supporting mold and the male mold can be disconnected, and the support effect for the male mold during the cooling process can be ensured, thereby avoiding deformation of the male mold during the metal cooling process, so that the structural parts can ensure the molding efficiency while ensuring the molding effect.

[0019] 4. In the present invention, the first groove is connected to the second groove through a hose, so the medium pressure in the first partition cavity and the second partition cavity remains consistent, so that the supporting force provided by the female mold and the male mold away from each other remains consistent, thereby avoiding uneven pressure on the female mold and the male mold causing cavity deformation, thereby further improving the accuracy of the structural parts after molding in the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0021] Figure 1 It is a three-dimensional diagram at one angle of the present invention;

[0022] Figure 2 It is a three-dimensional diagram of the present invention at another angle;

[0023] Figure 3 It is a position diagram of the first rotating groove and the second rotating groove in the present invention;

[0024] Figure 4 is a stereogram of the master mold in the present invention;

[0025] Figure 5 is a three-dimensional diagram of the male mold in the present invention;

[0026] Figure 6 is a cross-sectional view of the present invention;

[0027] Figure 7 yes Figure 6 The enlarged view of point A in the middle;

[0028] Figure 8 It is a cross-sectional view of the female mold and the male mold of the present invention.

[0029] In the figure: female mold 1, recessed portion 11, cooling channel 12, first guide rod 13, male mold 2, protrusion 21, cavity 22, exhaust hole 23, injection tube 24, second guide rod 25, first supporting mold 3, first square sleeve 31, first partition cavity 32, first rotating groove 33, first rotating rod 34, first eccentric disk 35, first gear 36, motor 37, second supporting mold 4, second square sleeve 41, second partition cavity 42, second rotating groove 43, second rotating rod 44, second eccentric disk 45, second gear 46, first base 5, first groove 51, first slide plate 52, first air hole 53, hose 54, first spring 55, first electric push rod 56, second base 6, second groove 61, second slide plate 62, second air hole 63, second spring 64, second electric push rod 65. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] like Figures 1 to 8 As shown, the present invention includes the following embodiments:

[0032] Embodiment 1:

[0033] A die for die-casting metal structural parts, comprising a female die 1 and a male die 2 corresponding to the female die 1; a recessed portion 11 of the female die 1 is adapted to a protruding portion 21 of the male die 2 to form a cavity 22; cooling channels 12 are provided inside the female die 1 and the male die 2; an exhaust hole 23 and an injection pipe 24 are connected inside and outside the cavity 22; a first support die 3 is provided on the side of the female die 1 away from the male die 2; a first guide rod 13 is fixedly connected to the side of the female die 1 away from the male die 2; the first guide rod 13 passes through the first support die 3 and is slidably connected to the first supporting mold 3; the side of the male mold 2 facing away from the female mold 1 is in contact with a second supporting mold 4; the second supporting mold 4 is slidably connected to the injection tube 24; the side of the male mold 2 facing away from the female mold 1 is fixedly connected to the second guide rod 25; the second guide rod 25 penetrates the second supporting mold 4 and is slidably connected to the second supporting mold 4; the female mold 1 and the first supporting mold 3 are in contact during the injection process and in a separated state during the cooling process; the male mold 2 and the second supporting mold 4 are in contact during the injection process and in a separated state during the cooling process.

[0034] During operation, after the mold is installed on the die-casting machine, the raw material is first heated to melt the metal raw material, and then the female mold 1 and the male mold 2 are controlled to move closer to each other until the female mold 1 contacts the male mold 2, and a cavity 22 is formed between the recessed portion 11 of the female mold 1 and the protruding portion 21 of the male mold 2. During the contact between the female mold 1 and the male mold 2, the first supporting mold 3 is in close contact with the side of the female mold 1 away from the male mold 2, and after the male mold 2 contacts the female mold 1, the first supporting mold 3 and the female mold 1 remain stationary. During the contact between the female mold 1 and the male mold 2, the second supporting mold 4 is in close contact with the side of the male mold 2 away from the female mold 1, and after the male mold 2 contacts the female mold 1, the second supporting mold 4 and the male mold 2 also remain stationary. Then, the molten metal is poured into the injection bin, and then the push rod is pushed to inject the molten metal in the injection bin into the cavity 22 along the injection pipe 24. The gas in the cavity 22 is pressurized and discharged along the exhaust hole 23. The exhaust hole 2 3, half of which is arranged on the end surface of the female mold 1, and the other half is arranged on the end surface of the male mold 2, so that the waste material in the exhaust hole 23 can be taken away after the subsequent mold opening. In addition, the orifice of the exhaust hole 23 is connected to the exhaust component, which can be understood as a pressure relief valve. The gas in the exhaust hole 23 can be discharged only under a certain pressure. During the injection process, the first support mold 3 gives the female mold 1 a supporting force away from the male mold 2, so that the thinner female mold 1 does not deform. At the same time, the second support mold 4 gives the male mold 2 a supporting force away from the female mold 1, so that the thinner male mold 2 does not deform, thereby ensuring the accuracy of the metal structural parts after subsequent molding. As the molten metal fills the cavity 22, the metal injection process is completed. During the injection process, the molten metal in the cavity 22 transfers heat to the female mold 1, the first support mold 3, the male mold 2 and the second support mold 4, so that the temperature of the female mold 1, the first support mold 3, the male mold 2 and the second support mold 4 rises;

[0035] Then, while keeping the contact between the female mold 1 and the male mold 2, the first supporting mold 3 is controlled to slide along the first guide rod 13 while moving away from the female mold 1, so that the first supporting mold 3 is disengaged from the female mold 1, and the heat transfer between the first supporting mold 3 and the female mold 1 is cut off as much as possible. The first guide rod can be set to a heat-insulating material. Even if it is a non-heat-insulating material, the heat transferred by the first guide rod is limited. When the male mold 2 is in contact with the female mold 1, the second supporting mold 4 is also controlled to disengage from the male mold 2 along the second guide rod 25, so that the heat transfer between the second supporting mold 4 and the male mold 2 is cut off as much as possible. The material of the second guide rod is consistent with that of the first guide rod. Then, the coolant is controlled to enter the cooling channel 12 in the female mold 1 and the male mold 2 along the liquid inlet hole, and the coolant in the cooling channel 12 After flowing for a circle, it is discharged along the liquid outlet hole. In the process of the coolant flowing along the cooling channel 12, the heat of the molten metal in the cavity 22 will be transferred to the coolant in the cooling channel 12 along the mother mold 1 and the male mold 2, so that the coolant cools the molten metal, the mother mold 1 and the male mold 2 in the cavity 22. Since the first support mold 3 is separated from the contact with the mother mold 1, the coolant in the cooling channel 12 does not need to absorb the heat of the first support mold 3. Similarly, the coolant in the cooling channel 12 will not absorb the heat of the second support mold 4. In this way, when the coolant in the overall cooling channel 12 absorbs less heat, the cooling speed of the metal in the cavity 22 is accelerated, so that the molten metal in the cavity 22 can be cooled and solidified more concentratedly, thereby improving the die-casting efficiency;

[0036] The molten metal in the cavity 22 is cooled and solidified to form a metal structural part. Finally, the first supporting mold 3 is controlled to approach and contact the female mold 1, and the second supporting mold 4 is controlled to approach and contact the male mold 2. Then, the female mold 1 and the male mold 2 are controlled to move away from each other. The female mold 1 will drive the first supporting mold 3 to move synchronously and away from the male mold 2, and the male mold 2 will drive the second supporting mold 4 to move synchronously and away from the female mold 1, so that the structural part is exposed, and the staff can take out the structural part in the cavity 22.

[0037] Embodiment 2:

[0038] The shapes of the two end surfaces of the female mold 1 are arranged to compensate for each other; the thickness of each position of the female mold 1 is consistent; the side of the first supporting mold 3 facing the female mold 1 is in adaptive contact with the side of the female mold 1 facing the first supporting mold 3; the shapes of the two end surfaces of the male mold 2 are arranged to compensate for each other; the thickness of each position of the male mold 2 is consistent; the side of the second supporting mold 4 facing the male mold 2 is in adaptive contact with the side of the male mold 2 facing the second supporting mold 4.

[0039] During operation, in order to further reduce the heat absorbed by the coolant on the mother mold 1, the thickness of each position of the mother mold 1 is set to be consistent, so as to further reduce the volume of the mother mold 1. At the same time, in order to avoid the strength of the mother mold 1 when the volume is reduced, the side of the first support mold 3 facing the mother mold 1 is adapted to contact with the side of the mother mold 1 facing the first support mold 3 to ensure a good support effect on the mother mold 1. After the volume of the mother mold 1 is further reduced, the coolant can be more concentrated on cooling the molten metal in the cavity 22. Similarly, after the volume of the male mold 2 is further reduced, the coolant can also be concentrated on cooling the molten metal.

[0040] Embodiment 3:

[0041] The first supporting mold 3 has a first square sleeve 31 as a sliding sealing sleeve on its outer wall; the first square sleeve 31 is fixedly connected to the edge of the female mold 1 facing away from the male mold 2; a first partition cavity 32 is formed between the inner side of the first square sleeve 31, the side of the first supporting mold 3 facing the female mold 1, and the side of the female mold 1 facing the first supporting mold 3; the second supporting mold 4 has a second square sleeve 41 as a sliding sealing sleeve on its outer wall; the second square sleeve 41 is fixedly connected to the edge of the male mold 2 facing away from the female mold 1; a second partition cavity 42 is formed between the inner side of the second square sleeve 41, the side of the second supporting mold 4 facing the male mold 2, and the side of the male mold 2 facing the second supporting mold 4.

[0042] During operation, since the first supporting mold 3 and the second supporting mold 4 need to play the role of compressive support, only some metal materials with high compressive strength can be used, and heat-insulating materials cannot be used. The first square sleeve 31 and the second square sleeve 41 can be set to heat-insulating materials, or can be set to non-heat-insulating materials but high-strength materials. After the molten metal is injected into the cavity 22, the injection process is completed, and then the first supporting mold 3 is controlled to break away from the contact with the mother mold 1 and form the first partition cavity 32. Since the first square sleeve 31 slides with the outer wall of the first supporting mold 3 Dynamic sealing connection is provided, so external gas cannot enter into the first partition cavity 32 along the gas, so that the space in the first partition cavity 32 becomes larger to form a vacuum, and the first partition cavity 32 under vacuum can better isolate the heat transfer between the first support mold 3 and the female mold 1; similarly, after the injection is completed, the second support mold 4 is separated from the contact with the male mold 2 and forms a second partition cavity 42. After the second support mold 4 slides on the inner wall of the second square sleeve 41, a vacuum is formed in the second partition cavity 42, which further isolates the heat transfer between the male mold 2 and the second support mold 4.

[0043] Embodiment 4:

[0044] The end of the first guide rod 13 away from the female mold 1 is fixedly connected to the first base 5; the first base 5 is provided with a first groove 51 on the side close to the first supporting mold 3; the first slide plate 52 is connected to the first supporting mold 3 in a sliding seal; the first slide plate 52 is fixedly connected to the first supporting mold 3; the side of the first slide plate 52 facing away from the first supporting mold 3 is connected to the interior of the first partition cavity 32 through a first air vent 53; the end of the second guide rod 25 away from the male mold 2 is fixedly connected to the second base 6; the second base 6 is provided with a second groove 61 on the side close to the second supporting mold 4; the second slide plate 62 is connected to the second supporting mold 4 in a sliding seal; the second slide plate 62 is fixedly connected to the second supporting mold 4; the side of the second slide plate 62 facing away from the second supporting mold 4 is connected to the interior of the second partition cavity 42 through a second air vent 63; the first groove 51 and the second groove 61 are both filled with insulating gas medium.

[0045] In this embodiment, the cross-section of the first groove 51 is larger than the cross-section of the first partition cavity 32; the medium in the first partition cavity 32 is pressurized when the first support mold 3 moves away from the female mold 1; the cross-section of the second groove 61 is larger than the cross-section of the second partition cavity 42; the medium in the second partition cavity 42 is pressurized when the first support mold 3 moves away from the male mold 2.

[0046] In this embodiment, the bottom of the first groove 51 is connected to the bottom of the second groove 61 through a hose 54; the hose 54 is located directly below the female mold 1 and the male mold 2; the medium pressure in the first partition cavity 32 is consistent with that in the second partition cavity 42.

[0047] During operation, when die-casting of a structural part is required, the staff will first control the first base 5 and the second base 6 to move closer to each other. When the first base 5 approaches the second base 6, it will drive the first guide rod 13 and the female mold 1 to approach the male mold 2. The first support mold 3 is controlled to be close to the female mold 1 and moves with the movement of the female mold 1. When the second base 6 approaches the first base 5, it will drive the second guide rod 25 and the male mold 2 to approach the female mold 1. The second support mold 4 is controlled to be close to the male mold 2 and moves with the movement of the male mold 2 until the female mold 1 contacts the male mold 2. After the female mold 1 contacts the male mold 2, a cavity 22 is formed. , then the molten metal is controlled to be injected into the cavity 22 under a certain pressure, the first supporting mold 3 supports the female mold 1, and the second supporting mold 4 supports the male mold 2. With the injection of the molten metal, the molten metal injection process in the cavity 22 is completed; then, before the coolant is controlled to be injected into the cooling channel 12, the first supporting mold 3 is controlled to be separated from the female mold 1 and away from the female mold 1. Since the first supporting mold 3 is slidably sealed and connected to the inner side of the first square sleeve 31, a first partition cavity 32 is formed. As the first supporting mold 3 moves away from the female mold 1, the first partition cavity 32 increases and forms a negative pressure. The first supporting mold 3 is close to the first concave cavity 32. During the process of the groove 51 being moved to the bottom, the medium in the first groove 51 will be squeezed by the first slide plate 52, so that the medium in the first groove 51 is pressed and enters the first partition cavity 32 along the first air vent 53 under the dual action of the negative pressure of the first insulation cavity. Since the medium in the first groove 51 is insulation gas, the insulation gas further insulates the first support mold 3 and the mother mold 1 after entering the first insulation cavity. Furthermore, since the cross-section of the first groove 51 is larger than the cross-section of the first partition cavity 32, when the first support mold 3 moves to the same distance along the first guide rod 13, the air in the first groove 51 is The shrinking degree of the space between the first groove 51 and the first partition cavity 32 is much greater than the expansion degree of the space in the first partition cavity 32, so that the total space in the first groove 51 and the first partition cavity 32 is reduced, so that the gas medium in the first heat insulation cavity is further expanded. After the pressure of the gas medium in the first partition cavity 32 increases, it can better provide support for the side of the female mold 1 away from the male mold 2, so that the heat transfer between the first support mold 3 and the female mold 1 can be disconnected while the support effect of the female mold 1 during the cooling process can be ensured, thereby avoiding the deformation of the female mold 1 during the metal cooling process, so that the structural parts can ensure the molding efficiency and the molding effect;

[0048] Similarly, before controlling the coolant to be injected into the cooling channel 12, the second supporting mold 4 is controlled to be separated from the male mold 2 and away from the male mold 2, and the second supporting mold 4 slides in the second square sleeve 41, so that the second partition cavity 42 is formed. As the second supporting mold 4 moves away from the male mold 2, the second partition cavity 42 forms a negative pressure, and at the same time, the second supporting mold 4 squeezes the gas medium in the second groove 61 through the second slide plate 62. Under the dual effects of pressure and negative pressure, the gas medium in the second groove 61 will enter the second partition cavity 42 along the second air vent 63. Since the cross-section of the second groove 61 is larger than the second partition cavity 42, the second supporting mold 4 will squeeze the gas medium in the second groove 61 through the second slide plate 62. When the mold 4 moves the same distance, the internal space of the second groove 61 becomes smaller than the internal space of the second partition cavity 42, so that the total space of the second groove 61 and the second partition cavity 42 also becomes smaller, so that the gas pressure in the second partition cavity 42 increases, so that better support can be provided for the side of the male mold 2 away from the female mold 1, so that the heat transfer between the second support mold 4 and the male mold 2 can be disconnected, and the support effect of the male mold 2 during the cooling process can be ensured, thereby avoiding the deformation of the male mold 2 during the metal cooling process, so that the structural parts can ensure the molding efficiency and the molding effect;

[0049] In the process of the first supporting mold 3 and the second supporting mold 4 moving away from each other, the air pressure in the first partition cavity 32 and the second partition cavity 42 will increase. Since the first groove 51 is connected to the first partition cavity 32 through the first air vent 53, the second groove 61 is connected to the second partition cavity 42 through the second air vent 63, and the first groove 51 is connected to the second groove 61 through the hose 54, the medium pressure in the first partition cavity 32 and the second partition cavity 42 is consistent, so that the supporting force provided by the female mold 1 and the male mold 2 on the side away from each other is consistent, thereby avoiding the deformation of the cavity 22 caused by uneven pressure on the female mold 1 and the male mold 2, thereby further improving the accuracy of the structure formed in the cavity 22; after completing the molding of the structure in the cavity 22, the first supporting mold 3 is controlled to contact with the female mold 1 again, and after the second supporting mold 4 is controlled to contact with the male mold 2 again, the first base 5 and the second base 6 are controlled to move away from each other, so that the female mold 1 and the male mold 2 are moved away from each other for mold opening, and the hose 54 is long enough to avoid interference problems.

[0050] Embodiment 5:

[0051] The outer wall of the first supporting mold 3 in contact with the first square sleeve 31 is provided with a first rotating groove 33; the first rotating groove 33 is connected to the side of the first supporting mold 3 close to the mother mold 1; a first rotating rod 34 is provided in the first rotating groove 33; the outer wall of the first rotating rod 34 is eccentrically fixedly connected to the first eccentric disk 35; the end of the first rotating rod 34 away from the first supporting mold 3 passes through the first square sleeve 31 and is fixedly connected to the first gear 36; the first rotating rod 34 is rotatably sealed and connected to the first square sleeve 31; the outer wall of the first square sleeve 31 is fixedly connected to the motor 37; the output shaft of the motor 37 is fixedly connected to the center of the first gear 36; the outer wall of the second supporting mold 4 in contact with the second square sleeve 41 is provided with a second rotating rod Slot 43; the second rotating groove 43 is connected to the second supporting mold 4 near the male mold 2; the second rotating groove 43 is rotatably connected to the second rotating rod 44; the outer wall of the second rotating rod 44 is eccentrically fixed to the second eccentric disk 45; the second rotating rod 44 is away from the second supporting mold 4 and is fixed to the second gear 46 through the second square sleeve 41; the first gear 36 and the second gear 46 are arranged corresponding to each other; after the female mold 1 contacts the male mold 2, the first gear 36 and the second gear 46 are meshed for transmission; the first slide plate 52 and the bottom of the first groove 51 are connected by the first spring 55; the second slide plate 62 and the bottom of the second groove 61 are connected by the second spring 64.

[0052] In this embodiment, the circumferential outer wall of the first base 5 is fixedly connected to the first electric push rod 56; the output shaft of the first electric push rod 56 passes through the first base 5 and extends into the first groove 51; the output shaft of the first electric push rod 56 is slidingly and sealingly connected to the first base 5; the output shaft of the first electric push rod 56 is in contact with the first slide plate 52 near the bottom of the first groove 51; the output shaft of the first electric push rod 56 can limit the first slide plate 52.

[0053] In this embodiment, the circumferential outer wall of the second base 6 is fixedly connected to the second electric push rod 65; the output shaft of the second electric push rod 65 passes through the second base 6 and extends into the second groove 61; the output shaft of the second electric push rod 65 is slidingly and sealingly connected to the second base 6; the output shaft of the second electric push rod 65 is in contact with the second slide plate 62 near the bottom of the second groove 61; the output shaft of the second electric push rod 65 can limit the second slide plate 62.

[0054] During operation, in the initial state, the first supporting mold 3 is in contact with the female mold 1, the first spring 55 transmits the elastic force to the first slide plate 52 in the first groove 51, and the first slide plate 52 transmits the elastic force of the first spring 55 to the first supporting mold 3, so that the first supporting mold 3 is pressed against the side of the female mold 1 away from the male mold 2, and at the same time, the output shaft of the first electric push rod 56 extends into the first groove 51, the output shaft of the first electric push rod 56 clamps the first slide plate 52, and the output shaft of the first electric push rod 56 contacts the side of the first slide plate 52 away from the female mold 1, so that the first supporting mold 3 is restricted, so that the first supporting mold 3 and the female mold 1 form a whole; similarly, the output shaft of the second electric push rod 65 extends into the second groove 61, and the output shaft of the second electric push rod 65 clamps the second slide plate 62, so that the second supporting mold 4 and the male mold 2 form a whole;

[0055] Then, the first base 5 and the second base 6 are controlled to approach each other, and the female mold 1 and the male mold 2 also approach each other and contact each other. The first gear 36 and the second gear 46 are meshed after the female mold 1 and the male mold 2 are approached to each other, and the cavity 22 is formed. After the injection of the material in the cavity 22 is completed, the output shaft of the first electric push rod 56 is controlled to retract to release the lock on the first slide plate 52, and the second electric push rod 65 is retracted at the same time to release the lock on the second slide plate 62. The motor 37 is controlled to drive the first rotating rod 34 to rotate, and the first rotating rod 34 will drive the first gear 36 to rotate, and the first gear 36 will drive the meshed second gear 46 to rotate, so that the second rotating rod 44 rotates synchronously with the rotation of the first rotating rod 34, and the first rotating rod 34 will drive the first eccentric disk 35 to rotate. The first eccentric disk 35 rotates during the rotation. The first rotating groove 33 is squeezed, thereby pushing the first supporting mold 3 away from the female mold 1. The second eccentric disk 45 squeezes the second rotating groove 43 as the second rotating rod 44 rotates, thereby pushing the second supporting mold 4 away from the male mold 2. In the next step, the coolant is controlled to enter the cooling channel 12, so that the metal in the cavity 22 is solidified and formed, and the motor 37 is controlled to reverse and drive the first eccentric disk 35 and the second eccentric disk 45 to return. The first spring 55 drives the first supporting mold 3 to return, and the second spring 64 drives the second supporting mold 4 to return. The output shaft of the first electric push rod 56 is locked to the first slide 52 again, and the output shaft of the second electric push rod 65 is also locked to the second slide 62 again. Finally, the first base 5 and the second base 6 are controlled to move away from each other, the female mold 1 and the male mold 2 are separated, and the first gear 36 and the second gear 46 are disengaged.

[0056] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A die for die-casting metal structural parts, comprising a female die (1) and a male die (2) corresponding to the female die (1); a recessed portion (11) of the female die (1) is adapted to a protruding portion (21) of the male die (2) to form a cavity (22); cooling channels (12) are provided inside the female die (1) and the male die (2); an exhaust hole (23) and an injection pipe (24) are connected inside and outside the cavity (22); the characteristics are: The side of the female mold (1) facing away from the male mold (2) is provided with a first supporting mold (3); the side of the female mold (1) facing away from the male mold (2) is fixedly connected to the first guide rod (13); the first guide rod (13) penetrates the first supporting mold (3) and is slidably connected to the first supporting mold (3); the side of the male mold (2) facing away from the female mold (1) is provided with a second supporting mold (4); the second supporting mold (4) is slidably connected to the injection pipe (24); the side of the male mold (2) facing away from the female mold (1) is fixedly connected to the second guide rod (25); the second guide rod (25) penetrates the second supporting mold (4) and is slidably connected to the second supporting mold (4); the female mold (1) and the first supporting mold (3) are in contact during the injection process and in a separated state during the cooling process; the male mold (2) and the second supporting mold (4) are in contact during the injection process and in a separated state during the cooling process.

2. The die for die-casting metal structural parts according to claim 1, characterized in that: The shapes of the two end surfaces of the female mold (1) are arranged to compensate for each other; the thickness of each position of the female mold (1) is kept consistent; the side of the first supporting mold (3) facing the female mold (1) is in adaptive contact with the side of the female mold (1) facing the first supporting mold (3); the shapes of the two end surfaces of the male mold (2) are arranged to compensate for each other; the thickness of each position of the male mold (2) is kept consistent; the side of the second supporting mold (4) facing the male mold (2) is in adaptive contact with the side of the male mold (2) facing the second supporting mold (4).

3. The die for die-casting metal structural parts according to claim 1, characterized in that: The first supporting mold (3) is provided with a first square sleeve (31) as a sliding sealing sleeve on the outer wall; the first square sleeve (31) is fixedly connected to the edge of a side of the female mold (1) facing away from the male mold (2); a first partition cavity (32) is formed between the inner side of the first square sleeve (31), the side of the first supporting mold (3) facing the female mold (1), and the side of the female mold (1) facing the first supporting mold (3); the second square sleeve (41) is provided with a sliding sealing sleeve on the outer wall of the second supporting mold (4); the second square sleeve (41) is fixedly connected to the edge of a side of the male mold (2) facing away from the female mold (1); a second partition cavity (42) is formed between the inner side of the second square sleeve (41), the side of the second supporting mold (4) facing the male mold (2), and the side of the male mold (2) facing the second supporting mold (4).

4. The die for die-casting metal structural parts according to claim 3, characterized in that: The end of the first guide rod (13) away from the female mold (1) is fixedly connected to the first base (5); the first base (5) is provided with a first groove (51) on a side close to the first supporting mold (3); the first slide plate (52) is slidably and sealably connected in the first groove (51); the first slide plate (52) is fixedly connected to the first supporting mold (3); the side of the first slide plate (52) away from the first supporting mold (3) is connected to the inside of the first partition cavity (32) through the first vent hole (53); the second guide rod (25) is away from the male mold (2 ) is fixedly connected to a second base (6); a second groove (61) is provided on a side of the second base (6) close to the second supporting mold (4); a second slide plate (62) is slidably and sealably connected in the second groove (61); the second slide plate (62) is fixedly connected to the second supporting mold (4); a side of the second slide plate (62) facing away from the second supporting mold (4) is connected to the interior of the second partition cavity (42) through a second air vent (63); and the first groove (51) and the second groove (61) are both filled with a heat-insulating gas medium.

5. The die for die-casting metal structural parts according to claim 4, characterized in that: The cross-section of the first groove (51) is larger than the cross-section of the first partition cavity (32); the medium in the first partition cavity (32) is pressurized when the first support mold (3) moves away from the female mold (1); the cross-section of the second groove (61) is larger than the cross-section of the second partition cavity (42); the medium in the second partition cavity (42) is pressurized when the first support mold (3) moves away from the male mold (2).

6. The die for die-casting metal structural parts according to claim 5, characterized in that: The bottom of the first groove (51) and the bottom of the second groove (61) are connected via a hose (54); the hose (54) is located directly below the female mold (1) and the male mold (2); and the medium pressure in the first partition cavity (32) and the medium pressure in the second partition cavity (42) are consistent.

7. The die for die-casting metal structural parts according to claim 4, characterized in that: The outer wall of the first supporting mold (3) in contact with the first square sleeve (31) is provided with a first rotating groove (33); the first rotating groove (33) is connected to the side of the first supporting mold (3) close to the mother mold (1); a first rotating rod (34) is provided in the first rotating groove (33); the outer wall of the first rotating rod (34) is eccentrically fixedly connected to the first eccentric disk (35); the end of the first rotating rod (34) away from the first supporting mold (3) passes through the first square sleeve (31) and is fixedly connected to the first gear (36); the first rotating rod (34) is rotatably sealedly connected to the first square sleeve (31); the outer wall of the first square sleeve (31) is fixedly connected to the motor (37); the output shaft of the motor (37) is fixedly connected to the center of the first gear (36); the outer wall of the second supporting mold (4) in contact with the second square sleeve (41) is provided with a second rotating groove ( 43); the second rotating groove (43) is connected to the second supporting mold (4) near the male mold (2); the second rotating groove (43) is rotatably connected to the second rotating rod (44); the outer wall of the second rotating rod (44) is eccentrically fixed to the second eccentric disk (45); the end of the second rotating rod (44) away from the second supporting mold (4) passes through the second square sleeve (41) and is fixed to the second gear (46); the first gear (36) and the second gear (46) are arranged corresponding to each other; after the female mold (1) contacts the male mold (2), the first gear (36) and the second gear (46) are meshed for transmission; the first slide plate (52) and the bottom of the first groove (51) are connected by a first spring (55); the second slide plate (62) and the bottom of the second groove (61) are connected by a second spring (64).

8. The die for die-casting metal structural parts according to claim 7, characterized in that: The circumferential outer wall of the first base (5) is fixedly connected to the first electric push rod (56); the output shaft of the first electric push rod (56) passes through the first base (5) and extends into the first groove (51); the output shaft of the first electric push rod (56) is connected to the first base (5) in a sliding and sealing manner; the output shaft of the first electric push rod (56) is in contact with a first slide plate (52) near the bottom of the first groove (51); the output shaft of the first electric push rod (56) can limit the first slide plate (52).

9. The die for die-casting metal structural parts according to claim 8, characterized in that: The circumferential outer wall of the second base (6) is fixedly connected to the second electric push rod (65); the output shaft of the second electric push rod (65) passes through the second base (6) and extends into the second groove (61); the output shaft of the second electric push rod (65) is connected to the second base (6) in a sliding and sealing manner; the output shaft of the second electric push rod (65) is in contact with a surface of the second slide plate (62) close to the bottom of the second groove (61); the output shaft of the second electric push rod (65) can limit the second slide plate (62).

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