Ejection exhaust system of automobile chassis support mold

Abstract

The ejection exhaust system of the automobile chassis support mold comprises a bottom mold fixing plate and an upper mold fixing plate, a lower mold is fixed to the middle of the top face of the bottom mold fixing plate, an upper mold is fixed to the bottom face of the upper mold fixing plate, and the upper mold is located above the lower mold, abuts against the top face of the lower mold in a pressing mode and is matched with the lower mold. A lower groove is formed in the top face of the bottom die fixing plate below the middle of the lower die, a bottom lifting plate is placed in the lower groove, and the outer side wall of the bottom lifting plate is close to the corresponding inner side wall of the lower groove. Extending parts are formed at the front parts and the rear parts of the left side and the right side of the bottom lifting plate; a formed product can be positioned at the upper mold during demolding, so that the subsequent tray can be conveniently moved below the upper mold for receiving materials, carrying is convenient, and subsequent automatic continuous processing is realized.

Description

Technical Field:

[0001] The present invention relates to the technical field of casting metal part processing equipment, and more specifically to an ejection and exhaust system for an automobile chassis bracket mold. Background Art:

[0002] Existing automobile chassis brackets are generally cast by low-pressure casting of aluminum alloy molten metal after the upper mold and the lower mold are pressed together. However, during the casting process, as Figure 3 shown, a mesh groove is formed on the forming wall surface of the bottom surface of the lower mold, so that the contact area between the bottom surface of the formed automobile chassis bracket and the bottom surface of the lower mold is greatly increased, thereby increasing its friction. The inner wall surface of the upper mold forms the top surface of the automobile chassis bracket. Since the top surface of the product must be a smooth surface, the inner wall surface of the upper mold is a smooth surface. This makes the friction between the top surface of the automobile chassis bracket and the upper mold less than the friction between its bottom surface and the lower mold. When the mold is opened, the upper mold will be demolded from the product, and the product will be in the lower mold. In existing automated processing, it generally hopes that the product is at the upper mold. Then, the tray is moved above the lower mold by a manipulator, and then, the product at the upper mold is pushed by the ejector rod of the upper mold and dropped onto the tray to facilitate continuous processing. However, this cannot be achieved now. Summary of the Invention:

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an ejection and exhaust system for an automobile chassis bracket mold, which can make the formed product be at the upper mold during demolding, so as to facilitate the subsequent movement of the tray below the upper mold for receiving materials, convenient handling, and realize subsequent automatic continuous processing.

[0004] The solution for the present invention to solve the above technical problems is:

[0005] An ejection and exhaust system for an automobile chassis bracket mold includes a bottom mold fixing plate and an upper mold fixing plate. The middle part of the top surface of the bottom mold fixing plate is fixed with a lower mold, and the bottom surface of the upper mold fixing plate is fixed with an upper mold. The upper mold is located above the lower mold and presses against the top surface of the lower mold and cooperates with the lower mold. A lower groove is formed on the top surface of the bottom mold fixing plate at the lower part of the middle of the lower mold. A bottom lifting plate is placed in the lower groove, and the outer side wall of the bottom lifting plate is close to the corresponding inner side wall of the lower groove;

[0006] The front and rear parts of the left and right sides of the bottom lifting plate are both formed with extension parts. The extension parts are inserted into the side extension grooves formed at the front and rear parts of the left and right sides of the lower groove and cooperate with the corresponding side extension grooves. The extension parts are inserted into the upward extension through grooves formed on the bottom surface of the left side plate or the right side plate of the lower mold. The outer ends of the extension parts extend out of the through grooves and a vertical lifting block is fixed on the top surface;

[0007] A plurality of vertical ejector rods are fixed in the middle of the bottom lifting plate. The bottom of the vertical ejector rods extends out of the bottom surface of the bottom lifting plate and the bottom surface of the bottom die fixing plate. The top of the vertical ejector rods extends out of the top surface of the bottom lifting plate and is inserted into corresponding vertical ejector through holes formed on the lower die.

[0008] Guide sliding blocks are fixed on the outer side of the top surface of the corresponding bottom fixing plate of the vertical lifting block. An upper lifting block is fixed on the outer side wall of the upper die directly above the guide sliding blocks. A middle through groove with a rectangular cross-section is formed in the middle of the upper lifting block. The middle part of the side lifting block is inserted into the middle through groove, and its outer side wall is closely attached to the inner side wall of the corresponding middle through groove. A convex part is formed at the inner end of the side lifting block. The top surface and the bottom surface of the convex part are both inclined wall surfaces. The outer ends of the two inclined wall surfaces are away from each other, and the inner ends are close to each other. The convex part is inserted into an outer positioning concave hole formed in the middle of the outer side wall of the corresponding vertical lifting block and is matched with the outer positioning concave hole. The outside of the side lifting block is sleeved on the corresponding guide sliding block.

[0009] The top surface and the bottom surface of the outer positioning concave hole are closely attached to and matched with the top surface and the bottom surface of the corresponding convex part.

[0010] The guide sliding block is inserted into a slot of a guide support block fixed on the top surface of the corresponding part of the bottom fixing plate. The top of the guide sliding block is an upper guide extension part extending obliquely outward and upward. The upper guide extension part extends out of the top surface of the guide support block. Horizontal guide rails are provided at the front and rear sides of the top of the guide support block where the upper guide extension part is located. The two horizontal guide rails are fixed on the upper lifting block. Horizontal guide grooves are formed in the middle of the opposite wall surfaces of the two horizontal guide rails. An intermediate moving block is fixed on the outside of the side lifting block. A central vertical guide through groove is formed in the middle of the intermediate moving block. The upper guide extension part is inserted into the central vertical guide through groove. The inner side wall and the outer side wall of the central vertical guide through groove are both inclined wall surfaces, which are matched with and close to the inner side wall and the outer side wall of the upper guide extension part.

[0011] A self-lubricating wear-resistant sheet is fixed on the inner side wall of the upper guide extension part, and its inner wall surface is closely attached to the inner side wall of the central vertical guide through groove.

[0012] Guide strips extending obliquely outward and upward are formed in the middle of the front side wall and the rear side wall of the upper guide extension part. The guide strips are inserted into the inclined guide grooves at the middle of the front side wall and the rear side wall of the corresponding central vertical guide through groove. The left side wall and the right side wall of the inclined guide groove are both inclined wall surfaces matched with the left side wall and the right side wall of the corresponding guide strip.

[0013] On the front and rear side walls at the top of the outer side of the upper guiding extension part, outer end obliquely protruding parts are formed. The outer end obliquely protruding parts are inserted into the outer oblique guiding grooves at the front side wall and the rear side wall at the outer end of the corresponding central vertical guiding through groove. The left side wall and the right side wall of the outer oblique guiding groove are both oblique wall surfaces that cooperate with the left side wall and the right side wall of the corresponding outer end obliquely protruding part.

[0014] In the middle of the top surface of the upper forming cavity formed on the bottom surface of the upper mold, a plurality of riser forming holes are formed. On the top surface of the upper mold directly above the riser forming holes, a lower groove is formed. The middle of the bottom surface of the lower groove communicates with the top of the riser forming holes.

[0015] An upper riser forming part is inserted into the lower groove. The bottom surface of the upper riser forming part presses against the bottom surface of the lower groove. A radially extending part is formed on the outer side wall at the bottom of the upper riser forming part. The outer side wall of the radially extending part closely adheres to the inner side wall of the lower groove. Venting transverse through grooves are formed on the left side wall and the right side wall of the upper riser forming part above the radially extending part. The height of the venting transverse through grooves is 0.3 to 0.4 mm. A radially extending groove is formed on the inner side wall at the top of the lower groove. The edge part of the end cover is inserted into the radially extending groove. The bottom surface of its edge part presses against the bottom surface of the radially extending groove and is fixedly connected by bolts. A protruding column is formed in the middle of the top surface of the upper riser forming part. The top surface of the protruding column presses against the middle bottom surface of the end cover. Asbestos is filled in the space between the end cover, the upper riser forming part and the lower groove.

[0016] The prominent effect of the present invention is:

[0017] Compared with the prior art, when the upper mold is lifted and opened, it drives the bottom lifting plate to lift, so that the vertical ejector rod thereon is lifted upward, making the product separate from the lower mold, ensuring that it is at the upper mold. Along with the lifting of the upper mold, the bottom lifting plate automatically returns to its position. Then, the subsequent product can be moved to the lower part of the upper mold through the manipulator and the tray for receiving materials, which is convenient for handling and realizes subsequent automatic continuous processing.

[0018] At the same time, the upper riser forming part it has can discharge excessive gas from the venting transverse through grooves to achieve exhaust. At the same time, after the molten metal continuously fills the upper riser forming part, the gas retained at its top will expand and squeeze the molten metal to flow back into the inner cavity of the upper mold for feeding. Moreover, the air at the top of the upper riser forming part also has a heat insulation effect. Combined with the external asbestos, it greatly slows down the solidification speed of the aluminum alloy molten metal in the upper riser forming part and ensures the feeding effect. Brief description of the drawings:

[0019] Figure 1 is a partial structural schematic diagram of the present invention;

[0020] Figure 2 is a partial cross-sectional view of the present invention;

[0021] Figure 3 It is a schematic diagram of the local structure at the lower die of the present invention;

[0022] Figure 4 It is a schematic diagram of the local structure at the guiding sliding block of the present invention;

[0023] Figure 5 It is a schematic diagram of the local structure at the upper die of the present invention;

[0024] Figure 6 is Figure 5 a partial enlarged view of;

[0025] Figure 7 It is a schematic diagram of the local structure between the lower die and the bottom lifting plate;

[0026] Figure 8 It is a schematic diagram of the local structure with side dies and other components removed;

[0027] Figure 9 It is a partial cross-sectional view of a part of the present invention. Specific embodiments:

[0028] In an embodiment, as shown in Figures 1 to 9 , an ejection and exhaust system for an automotive chassis bracket mold includes a bottom die fixing plate 10 and an upper die fixing plate 20. In the middle of the top surface of the bottom die fixing plate 10, a lower die 30 is fixed. On the bottom surface of the upper die fixing plate 20, an upper die 40 is fixed. Above the upper die fixing plate 20, there is an upper pushing fixing plate. On the bottom surface of the upper pushing fixing plate, a plurality of connecting columns are fixed. The upper die fixing plate 20 is fixed on the bottom surfaces of all the connecting columns. An upper pushing plate 21 is located between the upper die fixing plate 20 and the upper pushing fixing plate, and it is sleeved on all the connecting columns. On the bottom surface of the upper pushing plate, a plurality of upper pushing rods 22 are fixed. The upper pushing rods 22 are sleeved in the vertically aligned through holes formed in the upper die fixing plate 20 and the upper die 40. On the bottom surface of the upper pushing fixing plate, a plurality of upper ejecting oil cylinders 23 are fixed. The push rods of the upper ejecting oil cylinders 23 are fixed on the upper pushing plate 22. During use, the upper pushing fixing plate is fixed on the bottom of the push rod of the upper pushing oil cylinder above. These are all conventional structures and will not be elaborated here;

[0029] The upper die 40 is located above the lower die 30 and presses against the top surface of the lower die 30 and cooperates with the lower die 30. On the top surface of the bottom die fixing plate 10 at the middle lower part of the lower die 30, a lower groove is formed. In the lower groove, a bottom lifting plate 50 is placed. The outer side wall of the bottom lifting plate 50 is close to the corresponding inner side wall of the lower groove. In the middle of the top surface of the lower groove, a central convex column is formed. The central convex column is inserted into the central through hole of the bottom lifting plate 50, and its outer side wall is closely attached to the central through hole. The central convex column plays a role in accurately positioning the bottom die fixing plate 10;

[0030] The front and rear parts of both the left and right sides of the bottom lifting plate 50 are formed with extension parts 51. The extension parts 51 are inserted into the side extension grooves formed in the front and rear parts of both the left and right sides of the lower groove and are matched with the corresponding side extension grooves. The extension parts 51 are inserted into the upward extending through grooves formed on the bottom surfaces of the left side plate or the right side plate of the lower die 30. The outer ends of the extension parts 51 extend out of the through grooves, and vertical lifting blocks 52 are fixed on their top surfaces.

[0031] A plurality of vertical ejector rods 59 are fixed in the middle of the bottom lifting plate 50. The bottoms of the vertical ejector rods 59 extend out of the bottom surface of the bottom lifting plate 50 and out of the bottom surface of the bottom die fixing plate 10. The tops of the vertical ejector rods 59 extend out of the top surface of the bottom lifting plate 50 and are inserted into the corresponding vertical ejector through holes formed on the lower die 30.

[0032] Guide sliding blocks 11 are fixed on the outer sides of the top surfaces of the corresponding bottom fixing plates 10 of the vertical lifting blocks 52. Upper lifting blocks 41 are fixed on the outer side walls of the upper die 40 directly above the guide sliding blocks 11. A middle through groove with a rectangular cross-section is formed in the middle of the bottom surface of the upper lifting block 41. The middle parts of the side lifting blocks 60 are inserted into the middle through groove, and their outer side walls are closely attached to the inner side walls of the corresponding middle through grooves. A convex part 61 is formed at the inner end of the side lifting block 60. The top surface and the bottom surface of the convex part 61 are both inclined wall surfaces. The outer ends of the two inclined wall surfaces are away from each other, and the inner ends are close to each other. The convex part 61 is inserted into the outer positioning concave holes 521 formed in the middle of the outer side walls of the corresponding vertical lifting blocks 52 and is matched with the outer positioning concave holes 521. The outer parts of the side lifting blocks 60 are sleeved on the corresponding guide sliding blocks 11.

[0033] Furthermore, the top surface and the bottom surface of the outer positioning concave hole 521 are closely attached to and matched with the top surface and the bottom surface of the corresponding convex part 61.

[0034] Furthermore, the guide sliding blocks 11 are inserted into the slots of the guide support blocks 12 fixed on the top surfaces of the corresponding parts of the bottom fixing plates 10. The tops of the guide sliding blocks 11 are upper guide extension parts 111 that extend obliquely outward and upward. The upper guide extension parts 111 extend out of the top surface of the guide support blocks 12. Transverse guide rails 13 are inserted into the slots on the front and rear sides of the top of the guide support blocks 12 where the upper guide extension parts 111 are located. The tops of the transverse guide rails 13 are inserted into the upper slots formed on the front and rear side bottoms of the middle through groove of the upper lifting block 41. The transverse guide rails 13 are fixed on the upper lifting block 41. Transverse guide grooves are formed in the middle of the opposite wall surfaces of the two transverse guide rails 13. Intermediate moving blocks 62 are fixed on the outer parts of the side lifting blocks 60. Central vertical guide through grooves are formed in the middle of the intermediate moving blocks 62. The upper guide extension parts 111 are inserted into the central vertical guide through grooves. The inner side walls and the outer side walls of the central vertical guide through grooves are both inclined wall surfaces, which are matched with and close to the inner side walls and the outer side walls of the upper guide extension parts 111.

[0035] Furthermore, a self-lubricating wear-resistant sheet 112 is fixed on the inner side wall of the upper guiding extension portion 111, and its inner wall surface is closely attached to the inner side wall of the central vertical guiding through groove. Through the self-lubricating wear-resistant sheet 112, it can ensure the normal lifting and lowering of the middle moving block 62 along the upper guiding extension portion 111 and reduce wear.

[0036] Furthermore, guiding strips 113 extending obliquely outward and upward are formed in the middle of the front side wall and the rear side wall of the upper guiding extension portion 111. The guiding strips 113 are inserted into the inclined guiding grooves at the middle front side wall and the middle rear side wall of the corresponding central vertical guiding through groove. The left side wall and the right side wall of the inclined guiding groove are both inclined wall surfaces that cooperate with the left side wall and the right side wall of the corresponding guiding strip 113.

[0037] Furthermore, outer end obliquely protruding portions 114 are formed on the front and rear side walls at the top of the outer side of the upper guiding extension portion 111. The outer end obliquely protruding portions 114 are inserted into the outer inclined guiding grooves at the front side wall and the rear side wall at the outer end of the corresponding central vertical guiding through groove. The left side wall and the right side wall of the outer inclined guiding groove are both inclined wall surfaces that cooperate with the left side wall and the right side wall of the corresponding outer end obliquely protruding portion 114.

[0038] When this embodiment is in use, the upper die 40 descends and presses against the lower die 30, and the two cooperate with each other. Then, casting can be carried out. The aluminum alloy molten metal (in this embodiment, it is the front sub-frame in the low-pressure casting of the automotive chassis support frame) enters the inner cavity of the lower die 30 after entering the feeding port of the lower die 30 through the gate fixed on the bottom die fixing plate 10 for casting;

[0039] After completion, demolding is carried out by lifting the upper die 40. When the upper die 40 is lifted, when it is lifted by the upper lifting block 41, it drives the side lifting block 60 to lift. The protruding portion 61 formed at the inner end of the side lifting block 60 is located in the vertical lifting block 52, which also drives the bottom lifting plate 50 to lift. When the bottom lifting plate 60 is lifted, it drives the vertical ejector rod 59. When the vertical ejector rod 59 is lifted, the product in the lower die 30 is ejected and separated from the lower die 40;

[0040] As the upper die 40 is lifted, the bottom lifting plate 60 is lifted. At this time, the middle moving block 62 is lifted along the upper guiding extension 111. Through the oblique guiding of the upper guiding extension 111, the oblique guiding of the guiding strip 113, and the oblique guiding of the outer end oblique convex part 114, the side lifting block 60 is moved laterally outwards until the convex part 61 disengages from the vertical lifting block 52. At this time, the bottom lifting plate 50 will descend and no longer support the product. At this time, the product has basically disengaged from the lower die 30, thus ensuring that the product is at the upper die 40 and is lifted along with the upper die 40. Then, the manipulator can move the tray below the upper die 40. Pushed by the push rod of the upper ejecting oil cylinder 23, the upper pushing rod 22 descends to separate the product at the upper die 40 from the upper die 40, realizing separation. Then, it falls onto the tray to achieve material receiving, and then moves to the subsequent equipment for subsequent processing, which is very convenient.

[0041] When the upper die 40 and the lower die 30 are subsequently closed, the plate body pushed by the oil cylinder below the vertical ejecting rod 59 is lifted (this structure is not shown in the attached drawing and is a conventional structure, so it will not be elaborated here), lifting the vertical ejecting rod 59, thereby lifting the bottom lifting plate 60. The position where the bottom lifting plate 60 is lifted to the highest point is the position where the convex part 61 disengages from the vertical lifting block 52. At this time, the upper die 40 descends until the outside of the side lifting block 60 is sleeved on the corresponding guiding sliding block 11. As the upper die 40 descends, a part of its convex part 61 will enter the corresponding outer positioning concave hole 521. At this time, the plate body pushed by the oil cylinder below the vertical ejecting rod 59 descends and returns to its original position. As the upper die 40 descends, the entire convex part 61 will enter the corresponding outer positioning concave hole 521 and position the bottom lifting plate 60 to complete the die closing; of course, other die closing methods can also be adopted, which are all conventional methods and will not be elaborated here.

[0042] Furthermore, in the middle of the top surface of the upper forming cavity formed on the bottom surface of the upper die 40, a plurality of riser forming holes 42 are formed. The inner side wall of the riser forming hole 42 is an inclined wall surface, and the cross-sectional area of its upper hole is smaller than that of the lower part. On the top surface of the upper die 40 directly above the riser forming hole 42, a lower groove 43 is formed. The middle of the bottom surface of the lower groove 43 communicates with the top of the riser forming hole 42.

[0043] An upper riser forming part 44 is inserted into the lower groove 43. The bottom surface of the upper riser forming part 44 is pressed against the bottom surface of the lower groove 43. In the middle of the bottom surface of the upper riser forming part 44, an upper cavity extending upwards is formed. The upper cavity communicates with the riser forming hole 42, and at the same time, the inner side wall of the upper cavity is aligned with the corresponding inner side wall of the riser forming hole 42.

[0044] A radial extension part is formed on the outer side wall of the bottom of the riser forming part 44. The outer side wall of the radial extension part is closely attached to the inner side wall of the lower groove 43. Venting transverse grooves 45 are formed on the left and right side walls of the riser forming part 44 above the radial extension part. The height of the venting transverse grooves 45 is 0.3 to 0.4 mm to ensure that gas can be discharged and the aluminum alloy metal liquid basically cannot be discharged. A radial extension groove is formed on the inner side wall of the top of the lower groove 43. The edge part of the end cover 46 is inserted into the radial extension groove, and the bottom surface of its edge part is pressed against the bottom surface of the radial extension groove and fixedly connected by bolts. A convex column is formed in the middle of the top surface of the riser forming part 44. The top surface of the convex column is pressed against the bottom surface in the middle of the end cover 46. Asbestos is filled in the space between the end cover 46, the riser forming part 44 and the lower groove 43.

[0045] In the above structure, when in use, when the aluminum alloy metal liquid enters the forming cavity between the upper mold 40 and the lower mold 30, part of the aluminum alloy metal liquid will enter the riser forming hole 42, and it will discharge part of the gas from the gap between the bottom surface of the riser forming part 44 and the bottom surface of the lower groove 43. The gap between the bottom surface of the riser forming part 44 and the bottom surface of the lower groove 43 can be adjusted by loosening or tightening the bolts at the end cover 46 to adjust the distance between the bottom surface of the end cover and the top surface of the convex column of the riser forming part 44. When the adjusted distance is large, the gap between the bottom surface of the riser forming part 44 and the bottom surface of the lower groove 43 will become larger. After becoming larger, the gas and part of the aluminum alloy metal liquid will be discharged from the gap between the bottom surface of the riser forming part 44 and the bottom surface of the lower groove 43. Generally, it is adjusted to about 0.3 mm to ensure that the aluminum alloy metal liquid will not be discharged.

[0046] However, the aluminum alloy metal liquid continues to fill upward into the riser forming part 44, and it will discharge part of the redundant gas in the riser forming part 44 from the venting transverse grooves 45. Then, it continues to rise until it reaches the upper part of the upper cavity of the riser forming part 44. At this time, there is still a part of the gas left at the top of the upper cavity. Since the aluminum alloy metal liquid has a high temperature, it will heat and expand the gas at the top of the upper cavity, so that it has a certain pressure on the aluminum alloy metal liquid in the riser forming part 44, thus ensuring that the aluminum alloy metal liquid here has a downward pressure, so as to achieve the feeding effect. At the same time, due to the heat insulation effect of the gas at the top of the upper cavity, it can ensure the heat preservation effect of the aluminum alloy metal liquid at the riser forming part 44, reduce the condensation speed, and further ensure the feeding effect.

[0047] Moreover, asbestos is filled in the space between the end cover 46, the riser forming part 44 and the lower groove 43, and the asbestos further improves the heat preservation effect of the aluminum alloy metal liquid at the riser forming part 44, slows down the solidification speed, and improves the feeding effect.

[0048] In this embodiment, a forming groove extending downward is formed in the middle of the top surface of the left side wall or the right side wall of the lower die 30. A lower fixing block is fixed on the outer wall surface of the lower die 30 at the corresponding lower position of the forming groove. A plurality of guide rails extending left and right are fixed on the top surface of the lower fixing block. The side die 70 is located above the lower fixing block. A lower groove is formed on the bottom surface of the side die 70. The guide rails are inserted into the lower groove. A forming portion 71 is formed in the middle of the inner end of the side die 70. The forming portion 71 is inserted into the forming groove and is located in the inner cavity formed between the upper die 40 and the lower die 30. Guide plates are fixed on the outer sides of the lower die 30 at the front and rear sides of the side die 70. Upper limiting plates are fixed on the top surfaces of the two guide plates. Left and right extending grooves are formed on the top surfaces of the front and rear portions of the side die 70. Wear-resistant strips are inserted into the corresponding grooves and are fixedly connected to the bottom surfaces of the corresponding grooves by bolts. The top surfaces of the wear-resistant strips are closely attached to the bottom surfaces of the corresponding upper limiting plates. The outer ends of the two guide plates are fixed to the same fixing plate, and a pushing oil cylinder (which is a conventional structure and is only simply shown in the appendix Figure 9 and is not installed in the attached drawing. At the same time, no through holes are formed in the corresponding fixing plate), and the end of the push rod of the pushing oil cylinder passes through the fixing plate and is fixed on the outer wall surface of the outside of the side die 70 (a connecting groove 72 is formed on the top surface of the outside of the side die 70. A matching connecting plate can be inserted into the connecting groove. The connecting block fixed to the end of the push rod of the pushing oil cylinder is inserted into the through hole in the middle of the outer end surface of the side die 70 and extends into the connecting groove 72. The bottom of the connecting plate is inserted into the clamping groove formed in the middle of the top surface of the connecting block. The left and right side walls of the bottom of the connecting plate are closely attached to the left and right inner side walls of the clamping groove to achieve fixed connection. This connection method is convenient for disassembly). After casting is completed and before the upper die 40 and the lower die 30 are opened, first retract the push rod of the pushing oil cylinder to move the side die 70 out. As Figure 8 shown, it is the structure with the side die 70 removed. Grooves are formed in the middle of the opposite wall surfaces of the two products. This groove is the position where the forming portion 71 is located. The corresponding groove at one end of the product is formed through the side die 70. The forming side die 70 is a detachable structure, which has high flexibility and is convenient for replacement, repair and maintenance.

[0049] Finally, it should be pointed out that the above embodiments are only relatively representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and can have many variations. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention should be considered to fall within the protection scope of the present invention.

Claims

1. An ejection exhaust system for a chassis bracket mold of an automobile, comprising a bottom mold fixing plate (10) and an upper mold fixing plate (20), characterized in that: A lower mold (30) is fixed to the middle of the top surface of the lower mold fixing plate (10), an upper mold (40) is fixed to the bottom surface of the upper mold fixing plate (20), the upper mold (40) is pressed against the top surface of the lower mold (30), a lower groove is formed on the top surface of the lower mold fixing plate (10) below the middle of the lower mold (30), a bottom lifting plate (50) is placed in the lower groove, and the outer side wall of the bottom lifting plate (50) is close to the corresponding inner side wall of the lower groove; The front and rear parts of the left and right sides of the bottom lifting plate (50) are both formed with extension parts (51), and the top surface of the outer end of the extension part (51) is fixed with a vertical lifting block (52); A plurality of vertical ejecting rods (59) are fixed in the middle of the bottom lifting plate (50), the bottom of the vertical ejecting rods (59) protrudes from the bottom surface of the bottom lifting plate (50), and the top of the vertical ejecting rods (59) protrudes from the top surface of the bottom lifting plate (50) and is inserted into the corresponding vertical ejecting through holes formed on the lower mold (30); A guide sliding block (11) is fixed to the outer side of the top surface of the bottom fixed plate (10) corresponding to the vertical lifting block (52), and an upper lifting block (41) is fixed to the outer side wall of the upper mold (40) directly above the guide sliding block (11). A middle through groove extending upward is formed in the middle of the bottom surface of the upper lifting block (41), and the middle of the side lifting block (60) is inserted into the middle through groove. A protrusion (61) is formed at the inner end of the side lifting block (60), and the protrusion (61) is inserted into an external positioning recessed hole (521) formed in the middle of the outer side wall of the corresponding vertical lifting block (52) and cooperates with the external positioning recessed hole (521), and the outer part of the side lifting block (60) is sleeved on the corresponding guide sliding block (11).

2. The ejection exhaust system of the automobile chassis bracket mold according to claim 1, characterized in that: The top surface and the bottom surface of the outer positioning recessed hole (521) are in close contact with and matched with the top surface and the bottom surface of the corresponding raised portion (61).

3. The ejection exhaust system of the automobile chassis bracket mold according to claim 1, characterized in that: The guide sliding block (11) is inserted into a slot of a guide support block (12) fixed on the top surface at a corresponding position of the bottom fixed plate (10); the top of the guide sliding block (11) is an upper guide extension part (111) extending obliquely outward and upward; the upper guide extension part (111) extends out of the top surface of the guide support block (12); a transverse guide rail (13) is inserted into slots at the front and rear sides of the top of the guide support block (12) where the upper guide extension part (111) is located; the top of the transverse guide rail (13) is inserted into upper slots formed on the bottom surfaces of the front and rear sides of the middle through groove of the upper lifting block (41); the transverse guide rail (13) is fixed on the upper lifting block (41); The middle parts of the relative wall surfaces of the two transverse guide rails (13) are formed with transverse guide grooves, an intermediate moving block (62) is fixed to the outside of the side lifting block (60), a central vertical guide groove is formed in the middle part of the intermediate moving block (62), the upper guide extension part (111) is inserted into the central vertical guide groove, and the inner side wall and the outer side wall of the central vertical guide groove are both inclined wall surfaces, which match and are close to the inner side wall and the outer side wall of the upper guide extension part (111).

4. The ejection exhaust system of the automobile chassis bracket mold according to claim 3 is characterized in that: A self-lubricating wear-resistant sheet (112) is fixed on the inner side wall of the upper guide extension portion (111), and the inner side wall surface of the self-lubricating wear-resistant sheet (112) is in close contact with the inner side wall of the central vertical guide groove.

5. The ejection exhaust system of the automobile chassis bracket mold according to claim 3, characterized in that: The middle parts of the front side wall and the rear side wall of the upper guide extension part (111) are both formed with guide strips (113) extending obliquely outward and upward, and the guide strips (113) are inserted into the oblique guide grooves at the middle front side wall and the rear side wall of the corresponding central vertical guide through groove, and the left side wall and the right side wall of the oblique guide groove are both oblique wall surfaces matching the left side wall and the right side wall of the corresponding guide strip (113).

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