Double-seal internal structure of die-casting die of large die-casting structural member

Abstract

The invention belongs to the technical field of large die-casting structural part die sealing application, and particularly discloses a large die-casting structural part die-casting die double-seal internal structure which comprises a movable die core, a fixed die core, a movable die frame, a first oil cylinder with a support, a second oil cylinder with a support, a third oil cylinder with a support, an ejector pin plate and an ejector pin. Parting surface sealing parts are arranged on the matching surfaces of the movable mold core and the fixed mold core; and oil cylinder core-pulling position sealing parts and the like are arranged on the matching surfaces of the movable mold core, the fixed mold core, the movable mold frame, the first oil cylinder with the bracket, the second oil cylinder with the bracket and the third oil cylinder with the bracket. The sealing structure has the beneficial effects that the problem of complete sealing of a movable part and an air leakage part of the mold is solved, and operation and subsequent maintenance are convenient and reliable; the die adopts a full-sealing technology, so that the product quality is improved, heat treatment of a die casting is realized, the product quality of a welding part is improved, and the vacuum degree of the die is improved; the water leakage problem of the die can be thoroughly solved, and air holes, cold shut and other defects are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of large-scale die-casting structural component mold sealing application, and in particular relates to a double-pass sealing internal structure of a die-casting mold for a large-scale die-casting structural component. Background Art

[0002] The existing technology uses sealing rings for sealing, which cannot guarantee the reliability of sealing for the active parts. In particular, the sealing effect of the slider and ejector pin is not good, resulting in low vacuum degree of the mold, and the product quality cannot be guaranteed, resulting in low quality of die-casting structural parts.

[0003] At the same time, since die-cast structural parts require heat treatment, welding, etc., the quality of subsequent processes cannot be guaranteed due to the large number of internal pores in the structural parts.

[0004] Therefore, based on the above problems, the present invention provides a double-pass sealing internal structure of a die-casting mold for a large die-casting structural part. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a double-pass sealed internal structure of a die-casting mold for large die-casting structural parts, to solve the problem of sealing of the die-casting mold, to improve the vacuum degree of the die-casting mold, to effectively seal the mold, to achieve the problem of ring sealing of the mold, especially the sealing problem of the active parts of the mold; to improve the vacuum degree of the mold to achieve a high degree of sealing of the mold, to achieve the weldability of the die-casting product, to allow heat treatment to improve the efficient production of lightweight products, and to significantly improve the product qualification rate; at the same time, the vacuum degree of the mold in the working state reaches 20-100 MPa to meet the production requirements of die-casting structural parts for new energy vehicles.

[0006] Technical solution: The double-pass sealed internal structure of the die-casting mold for large-scale die-casting structural parts provided by the present invention comprises a movable mold core, a fixed mold core, a movable mold frame, a first oil cylinder with a bracket, a second oil cylinder with a bracket, a third oil cylinder with a bracket, a fixed mold frame, a sprue sleeve, a barrel, a movable mold insert, an ejector base plate, an ejector plate, an ejector mold frame sealing plate and an ejector, the matching surfaces of the movable mold core and the fixed mold core are provided with a parting surface sealing portion, the matching surfaces of the movable mold core, the fixed mold core, the movable mold frame, the first oil cylinder with a bracket, the second oil cylinder with a bracket and the third oil cylinder with a bracket are provided with a cylinder core pulling position sealing portion, the matching surfaces of the movable mold core and the movable mold frame are provided with a mold core sealing portion, the matching surfaces of the sprue sleeve and the barrel are provided with a sprue sleeve sealing portion, and the matching surfaces of the movable mold core and the movable mold insert are provided with an insert sealing portion.

[0007] In the technical solution, the parting surface sealing portion includes a fixed mold core sealing groove arranged in one side of the fixed mold core, and a first sealing strip arranged in the fixed mold core sealing groove and abutting against the opposite surface of the movable mold core.

[0008] In the technical solution, the cylinder core-pulling position sealing portion includes a first slider, a second slider, and a second slider, which are respectively arranged on the first cylinder with a bracket, the second cylinder with a bracket, and the third cylinder with a bracket and are used in conjunction with each other.

[0009] In the technical solution, the double-pass sealing internal structure of the die-casting mold of the large die-casting structural part also includes wedge-shaped sealing strips respectively arranged on the surfaces of the first slider, the second slider, and the second slider.

[0010] In the technical solution, the mold core sealing part includes a movable mold frame sealing groove arranged in one side of the movable mold frame, and a second sealing strip arranged in the movable mold frame sealing groove and abutting against the opposite surface of the movable mold core.

[0011] In the technical solution, the gate sleeve sealing part includes a conical hollow sealing groove arranged on the inner wall of one end of the gate sleeve, a sealing convex ring arranged on the outer wall of one end of the gate sleeve, and a first sealing ring which is mounted on the barrel and abuts against the inner surface of the conical hollow sealing groove.

[0012] In the technical solution, the insert sealing part includes a first insert sealing ring groove and a second insert sealing ring groove respectively arranged in the end faces of both ends of the movable mold insert, and a second sealing ring and a third sealing ring respectively inserted in the first insert sealing ring groove and the second insert sealing ring groove and used in conjunction with the movable mold core.

[0013] According to the technical solution, the double-pass sealing internal structure of the die-casting mold for large die-casting structural parts also includes ejector sealing blocks that are respectively fixed in the movable mold core and the movable mold frame and used in conjunction with the ejector, and a sealing grease layer that is coated on one side of the ejector mold frame sealing plate and used in conjunction with the movable mold frame.

[0014] In the technical solution, the double-pass sealing internal structure of the die-casting mold for large die-casting structural parts further includes an ejector mold frame sealing plate groove arranged in one side of the ejector mold frame sealing plate.

[0015] In the technical solution of the present invention, the depth of the groove of the ejector mold frame sealing plate is 5 mm.

[0016] Compared with the prior art, the double-pass sealing internal structure of the die-casting mold for large die-casting structural parts of the present invention has the following beneficial effects:

[0017] 1. The present invention solves all sealing problems of active parts of the mold and leaking parts of the mold, and the operation and subsequent maintenance are convenient and reliable.

[0018] 2. The mold adopts full sealing technology to improve product quality, realize heat treatment of die castings, improve product quality of welding parts, and greatly improve the vacuum degree of the mold; it can completely solve the problem of mold leakage and reduce the generation of pores, cold shut and other defects.

[0019] 3. Completely solve the sealing problem of large molds, improve the vacuum degree of molds, and achieve high sealing of molds; at the same time, operation and subsequent maintenance are more convenient, and replacement is doubled. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the positions of the parting surface sealing part, the oil cylinder core-pulling position sealing part, the mold core sealing part, etc. of the double-pass sealing internal structure of the die-casting mold for large-scale die-casting structural parts of the present invention;

[0022] Figure 2A , 2B They are respectively the split structural schematic diagrams of the double-pass sealing internal structure of the die-casting mold for a large die-casting structural part of the present invention;

[0023] 3A and 3B are schematic diagrams of the split structure of the parting surface sealing portion;

[0024] 4A, 4B, 4C, and 4D are schematic diagrams of the split structure of the sealing part of the oil cylinder core pulling position;

[0025] 5A and 5B are schematic diagrams of the split structure of the mold core sealing part;

[0026] 6A, 6B, 6C, 6D, and 6E are schematic diagrams of the split structure of the sprue bushing sealing portion;

[0027] 7A, 7B, 7C, 7D, and 7E are schematic diagrams of the split structure of the insert sealing portion;

[0028] Figure 8 It is a schematic diagram of applying sealant to the mold using a pin;

[0029] 9A and 9B are schematic structural diagrams of a movable mold core, a movable mold frame, an ejector pin, an ejector pin sealing block, an ejector mold frame sealing plate, and a sealing grease layer, respectively;

[0030] Fig.10 It is a structural schematic diagram of an ejector mold frame sealing plate and an ejector mold frame sealing plate groove;

[0031] Fig.11 It is a structural schematic diagram of a wedge-shaped sealing strip inserted into a wedge-shaped groove of a moving mold core;

[0032] Fig.12It is a schematic diagram of the vertical connection structure of the wedge-shaped sealing strip and the transition connecting plate;

[0033] Fig.13 It is a schematic diagram of the vertical connection structure of the wedge-shaped sealing strip, the transition connecting plate, and the wedge-shaped sealing strip connecting groove;

[0034] Among them, the serial numbers in the figure are as follows: 100-movable mold core, 1001-movable mold core wedge groove, 101-fixed mold core, 102-fixed mold core sealing groove, 103-first sealing strip, 200-movable mold frame, 201-first cylinder with bracket, 2011-first slider, 202-second cylinder with bracket, 2021-second slider, 203-third cylinder with bracket, 2031-third slider, 204-movable mold frame sealing groove, 205-second sealing strip, 300-fixed mold frame, 301-gate bushing, 302-barrel, 3011-conical hollow seal Sealing groove, 3012-sealing convex ring, 3013-first sealing ring, 400-movable mold insert, 401-first insert sealing ring groove, 402-second insert sealing ring groove, 4011-second sealing ring, 4021-third sealing ring, 500-ejector base plate, 501-ejector plate, 502-ejector mold frame sealing plate, 503-ejector, 5031-ejector sealing block, 504-sealing grease layer, 5021-ejector mold frame sealing plate groove, 600-wedge-shaped sealing strip, 6001-wedge-shaped sealing strip connecting groove, 700-transition connecting plate. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "top", "bottom", "side"

[0037] , "the other side", "the front", "the back", "the middle", "the inside", "the top", "

[0038] The orientation or positional relationship indicated by "first", "second", "third" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Example

[0040] like Figure 1 , Figure 2A and Figure 2B The double-pass sealed internal structure of the die-casting mold for a large die-casting structural part shown in the figure includes a movable mold core 100, a fixed mold core 101, a movable mold frame 200, a first oil cylinder with a support 201, a second oil cylinder with a support 202, a third oil cylinder with a support 203, a fixed mold frame 300, a gate sleeve 301, a barrel 302, a movable mold insert 400, an ejector base plate 500, an ejector plate 501, an ejector mold frame sealing plate 502 and an ejector 503.

[0041] The matching surfaces of the movable mold core 100 and the fixed mold core 101 are provided with a parting surface sealing portion 3.

[0042] The matching surfaces of the movable mold core 100, the fixed mold core 101, the movable mold frame 200, the first oil cylinder with a support 201, the second oil cylinder with a support 202, and the third oil cylinder with a support 203 are provided with an oil cylinder core-pulling position sealing part 4,

[0043] The matching surfaces of the movable mold core 100 and the movable mold frame 200 are provided with a mold core sealing portion 5.

[0044] The matching surfaces of the sprue bushing 301 and the barrel 302 are provided with a sprue bushing sealing portion 6.

[0045] The matching surfaces of the movable mold core 100 and the movable mold insert 400 are provided with an insert sealing portion 7 .

[0046] In addition, the parting surface sealing portion 3 as shown in Figures 3A and 3B preferably includes a fixed mold core sealing groove 102 arranged in one side of the fixed mold core 101, and a first sealing strip 103 arranged in the fixed mold core sealing groove 102 and abutting against the opposite surface of the movable mold core 100; wherein the first sealing strip 103 is a high temperature resistant sealing strip seal, which seals the mold parting surface after the mold is closed.

[0047] In addition, preferably, the cylinder core-pulling position sealing portion 4 as shown in Figures 4A, 4B, 4C, and 4D includes a first slider 2011, a second slider 2021, and a second slider 2031, which are respectively arranged on the first cylinder with a bracket 201, the second cylinder with a bracket 202, and the third cylinder with a bracket 203, and are used in conjunction with each other.

[0048] At the same time, if Fig.11 , Fig.12 and Fig.13 The double-pass sealing internal structure of the die-casting mold for a large die-casting structural part shown in the figure also includes a wedge-shaped sealing strip 600 respectively arranged on the surface of the first slider 2011, the second slider 2021, and the second slider 2031. The wedge-shaped sealing strip 600 is a high-temperature resistant sealing strip, and its sealing state is embedded in the movable mold core 100 of the mold (there is a movable mold core wedge-shaped groove 1001 on the movable mold core 100 that matches the sealing strip). When pressed, the wedge-shaped sealing strip 600 is stuck in the movable mold core wedge-shaped groove 1001 of the movable mold core 100 to achieve sealing.

[0049] The contact surfaces of the wedge-shaped sealing strip 600 and the wedge-shaped groove 1001 of the movable mold core are respectively set to be inclined surfaces with an angle of 1-2°.

[0050] The inclined surface of the wedge-shaped sealing strip 600 has an inclined design. The wedge-shaped sealing strip 600 is respectively combined with the first slider 2011 or the second slider 2021 or the second slider 2031. After the mold is closed, the matching gap and the sealing strip are used for sealing to achieve a good sealing effect.

[0051] At the same time, the connecting surfaces of the first slider 2011, the second slider 2021, and the second slider 2031 with the wedge-shaped sealing strip 600 are respectively set to be inclined sealing connections, and a wedge-shaped sealing strip connecting groove 6001 is set on the wedge-shaped sealing strip 600, and a transition connecting plate 700 is respectively set at one end of the first slider 2011, the second slider 2021, and the second slider 2031. The transition connecting plate 700 is fixedly connected to the wedge-shaped sealing strip 600 through the wedge-shaped sealing strip connecting groove 6001, so that the connecting end cylinder part adopts the matching surface inclination sealing and high-temperature grease sealing, and at the same time reduces the movement wear of the mold cylinder part.

[0052] In addition, the slope of the inclined surface of the wedge-shaped sealing strip 600 of 1-2° can also be designed to be adaptively matched and adjusted according to the size of the mold (the size of the moving mold core wedge-shaped groove 1001 on the moving mold core 100 that matches the sealing strip).

[0053] In addition, the mold core sealing portion 5 preferably includes a movable mold frame sealing groove 204 arranged in one side of the movable mold frame 200, and a second sealing strip 205 arranged in the movable mold frame sealing groove 204 and abutting against the opposite surface of the movable mold core 100; wherein the second sealing strip 205 is a high temperature resistant sealing strip seal.

[0054] In addition, preferably, the sprue bushing sealing portion 6 as shown in FIGS. 6A, 6B, 6C, 6D and 6E comprises a conical hollow sealing groove 3011 provided on the inner wall of one end of the sprue bushing 301, a sealing convex ring 3012 provided on the outer wall of one end of the sprue bushing 301, and a first sealing ring 3013 which is set on the barrel 302 and abuts against the inner surface of the conical hollow sealing groove 3011;

[0055] The height of the conical hollow sealing groove 3011 is 5 mm, the angle of the inner surface slope is 45°, the thickness of the sealing convex ring 3012 is 5 mm, and the first sealing ring 3013 is a high temperature resistant sealing ring.

[0056] In addition, preferably, the insert sealing portion 7 as shown in FIGS. 7A, 7B, 7C, 7D and 7E includes a first insert sealing ring groove 401 and a second insert sealing ring groove 402 respectively arranged in the end surfaces of both ends of the movable mold insert 400, and a second sealing ring 4011 and a third sealing ring 4021 respectively sleeved in the first insert sealing ring groove 401 and the second insert sealing ring groove 402 and used in conjunction with the movable mold core 100;

[0057] The second sealing ring 4011 and the third sealing ring 4021 are high temperature resistant sealing rings, and the second sealing ring 4011 and the third sealing ring 4021 are coated with sealing grease.

[0058] The bottom (first insert sealing ring groove 401) and the top (second insert sealing ring groove 402) of the movable mold insert 400 are combined with the second sealing ring 4011 and the third sealing ring 4021 to realize the upper and lower sealing mode to improve the sealing reliability.

[0059] In addition, preferably, the double-channel sealing internal structure of the die-casting mold for large die-casting structural parts as shown in FIGS. 9A and 9B also includes an ejector sealing block 5031 respectively fixedly disposed in the movable mold core 100 and the movable mold frame 200 and used in conjunction with the ejector 503, and a sealing grease layer 504 coated on one side of the ejector mold frame sealing plate 502 and used in conjunction with the movable mold frame 200;

[0060] Among them, the ejector pin sealing block 5031 is fixedly arranged in the movable mold core 100 and the movable mold frame 200 respectively, and does not move synchronously with the ejector pin 503. The ejector pin sealing block 5031 is a circular hollow high-temperature resistant sealing block, and abuts against the surface of the ejector pin 503. The inner wall of the ejector pin sealing block 5031 is coated with sealing grease.

[0061] In addition, preferably Fig.10 The double-pass sealing internal structure of the die-casting mold for a large die-casting structural part shown in the figure also includes an ejector mold frame sealing plate groove 5021 arranged in one side of the ejector mold frame sealing plate 502;

[0062] The sealing grease layer 504 is located in the groove 5021 of the sealing plate of the ejector mold frame.

[0063] In addition, the depth of the ejector mold frame sealing plate groove 5021 is preferably 5 mm, that is, the ejector mold frame sealing plate groove 5021 with a machined depth of 5 mm is used in the active part of the ejector 503 of the mold, and a sealing grease layer 504 is added in the middle to ensure the sealing of the ejector 503.

[0064] In addition, if Figure 8 As shown, in actual application, the pin part of this mold is coated with high-temperature sealant to ensure the sealing of the pin.

[0065] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0066] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A double-pass sealed internal structure of a die-casting mold for a large die-casting structural part, comprising a movable mold core (100), a fixed mold core (101), a movable mold frame (200), a first oil cylinder with a support (201), a second oil cylinder with a support (202), a third oil cylinder with a support (203), a fixed mold frame (300), a sprue bushing (301), a barrel (302), a movable mold insert (400), an ejector base plate (500), an ejector plate (501), an ejector mold frame sealing plate (502) and an ejector (503), characterized in that: The matching surfaces of the movable mold core (100) and the fixed mold core (101) are provided with a parting surface sealing portion (3). The matching surfaces of the movable mold core (100), the fixed mold core (101), the movable mold frame (200), the first oil cylinder with a support (201), the second oil cylinder with a support (202), and the third oil cylinder with a support (203) are provided with an oil cylinder core-pulling position sealing portion (4). The matching surfaces of the movable mold core (100) and the movable mold frame (200) are provided with a mold core sealing portion (5). The matching surfaces of the sprue bushing (301) and the barrel (302) are provided with a sprue bushing sealing portion (6). The matching surfaces of the movable mold core (100) and the movable mold insert (400) are provided with an insert sealing portion (7).

2. The double-pass sealing internal structure of the die-casting mold for large die-casting structural parts according to claim 1 is characterized in that: The parting surface sealing portion (3) comprises a fixed mold core sealing groove (102) arranged in one surface of the fixed mold core (101), and a first sealing strip (103) arranged in the fixed mold core sealing groove (102) and abutting against the opposite surface of the movable mold core (100).

3. The double-pass sealing internal structure of the die-casting mold for large die-casting structural parts according to claim 1 is characterized in that: The oil cylinder core-pulling position sealing part (4) comprises a first slider (2011), a second slider (2021) and a third slider (2031) which are respectively arranged on a first oil cylinder with a bracket (201), a second oil cylinder with a bracket (202) and a third oil cylinder with a bracket (203) and are used in conjunction with each other.

4. The double-pass sealing internal structure of the die-casting mold for large die-casting structural parts according to claim 3 is characterized in that: The double-pass sealing internal structure of the die-casting mold for a large die-casting structural component also includes wedge-shaped sealing strips (600) respectively arranged on the surfaces of the first slider (2011), the second slider (2021), and the second slider (2031).

5. The double-pass sealing internal structure of the die-casting mold for large die-casting structural parts according to claim 1, characterized in that: The mold core sealing portion (5) comprises a movable mold frame sealing groove (204) arranged in one surface of the movable mold frame (200), and a second sealing strip (205) arranged in the movable mold frame sealing groove (204) and abutting against the opposite surface of the movable mold core (100).

6. The double-pass sealing internal structure of the die-casting mold for large die-casting structural parts according to claim 1, characterized in that: The gate sleeve sealing portion (6) comprises a conical hollow sealing groove (3011) arranged on the inner wall of one end of the gate sleeve (301), a sealing convex ring (3012) arranged on the outer wall of one end of the gate sleeve (301), and a first sealing ring (3013) which is mounted on the barrel (302) and abuts against the inner surface of the conical hollow sealing groove (3011).

7. The double-pass sealing internal structure of the die-casting mold for large die-casting structural parts according to claim 1, characterized in that: The insert sealing part (7) comprises a first insert sealing ring groove (401) and a second insert sealing ring groove (402) respectively arranged in the end surfaces of both ends of the movable mold insert (400), and a second sealing ring (4011) and a third sealing ring (4021) respectively sleeved in the first insert sealing ring groove (401) and the second insert sealing ring groove (402) and used in conjunction with the movable mold core (100).

8. The double-pass sealing internal structure of a die-casting mold for a large die-casting structural part according to any one of claims 1 to 7, characterized in that: The double-pass sealing internal structure of the die-casting mold for a large die-casting structural part also includes an ejector sealing block (5031) which is respectively fixedly arranged in a movable mold core (100) and a movable mold frame (200) and used in conjunction with an ejector pin (503), and a sealing grease layer (504) which is coated on one side of an ejector mold frame sealing plate (502) and used in conjunction with the movable mold frame (200).

9. The double-pass sealing internal structure of the die-casting mold for large die-casting structural parts according to claim 8, characterized in that: The double-pass sealing internal structure of the die-casting mold for a large die-casting structural part further comprises an ejector mold frame sealing plate groove (5021) arranged in one side of the ejector mold frame sealing plate (502).

10. The double-pass sealing internal structure of the die-casting mold for large die-casting structural parts according to claim 9, characterized in that: The depth of the ejector mold frame sealing plate groove (5021) is 5 mm.

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