A lost foam mold for a dry engine block with an ejection function

Abstract

The invention discloses a lost foam mold for a dry engine cylinder block with an ejection function, and relates to the technical field of lost foam molds, including a lower mold base, wherein a placement plate is arranged inside the lower mold base, and a docking groove is opened on the side of the placement plate, and a docking rod is nested and connected inside the docking groove, and the upper end of the docking rod is fixedly connected to the upper mold base. In the lost foam mold for a dry engine cylinder block with an ejection function, when the lower mold base is separated from the upper mold base, the docking rod arranged on the lower side of the upper mold base is separated from the docking groove, and the docking groove does not interfere with the inclined block, and at this time, a primary ejection mechanism is operated, and the ejector rod can be driven to move upward by the primary ejection mechanism, so as to eject the mold, and the placement plate will synchronously drive the secondary ejection mechanism to operate while moving downward, and the contact plate can assist in ejecting the side of the mold under the drive of the secondary ejection mechanism, thereby reducing the possibility of damage to the edge of the mold during demolding.

Description

Technical Field

[0001] The present invention relates to the technical field of lost foam molds, and particularly to a lost foam mold for a dry engine cylinder block with an ejection function. Background Art

[0002] A dry engine cylinder block, also known as a cylinder linerless engine cylinder block, can be produced by using the lost foam casting process during the production process. When using the lost foam casting process for production, no residues will be left in the final casting, which can improve the perfection of the finished dry engine cylinder block.

[0003] Prior Art 1 (Chinese Patent with Publication No.: CN209062084U, Publication Date: July 5, 2019) A lost foam mold for a cylinder liner engine cylinder block, the upper end surface of the stripping plate is flush with the upper end surface of the lower die air chamber I; a driving mechanism is provided corresponding to the stripping plate; the upper end surface of the lower die air chamber II of the cylinder block small piece mold has a water chamber small piece, an oil chamber small piece and a cylinder barrel small piece, which solves the problem of sand cleaning in the cylinder barrel cooling water chamber of the cylinder liner engine cylinder block, and realizes the automatic ejection of the white mold, shortening the product R & D cycle; and Prior Art 2 (Chinese Patent with Publication No.: CN111250654A, Publication Date: June 9, 2020) A lost foam mold for the interchange of motor housing inserts, provided with a shock absorption cushion layer, an ozone generator and ejector rods, which can reduce the vibration generated by the machine, protect the normal operation of the machine, and can also prevent harmful gases from polluting the mold workshop, and can make the replacement of mold inserts more convenient, saving time and effort during use by people, being applicable to different working conditions and bringing a better application prospect.

[0004] Although Prior Art 1 and Prior Art 2 can improve the processing efficiency, during the process of taking out the mold body, most of them carry out the demolding operation on the mold body manually, and the lost foam is not evenly stressed, which is prone to the phenomenon of tearing and damage, thus reducing the qualification rate of the mold and having certain limitations. Therefore, we propose a lost foam mold for a dry engine cylinder block with an ejection function to solve the problems raised above. Summary of the Invention

[0005] The purpose of the present invention is to provide a lost foam mold for a dry engine cylinder block with an ejection function to solve the problem that in the current market, during the process of taking out the mold body, most of them carry out the demolding operation on the mold body manually, and the lost foam is not evenly stressed, which is prone to the phenomenon of tearing and damage, thus reducing the qualification rate of the mold and having certain limitations as mentioned in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: a lost foam mold for a dry engine block with an ejection function, including a lower mold base. A placement plate is arranged inside the lower mold base, and a docking groove is formed on the side of the placement plate. A docking rod is nested inside the docking groove, and the upper end of the docking rod is fixedly connected to an upper mold base. A lower mold cavity is formed at the center of the inner part of the mold base, and an adjustment cavity is formed on the side of the lower mold base. A first ejection groove is formed on the side of the adjustment cavity, and a ejector rod is nested at the top of the first ejection groove. A primary ejection mechanism for preliminarily ejecting the mold is arranged between the lower end of the ejector rod and the inside of the adjustment cavity. An auxiliary ejection groove is also formed on the side of the lower mold base, and an auxiliary frame is arranged inside the auxiliary ejection groove. A secondary ejection mechanism for assisting in ejecting the mold is arranged between the inside of the auxiliary frame and the inside of the lower mold base.

[0007] Preferably, the primary ejection mechanism includes an inclined block nested inside the adjustment cavity. A connecting rod is fixedly connected to the inner side of the inclined block, and a push rod is fixedly connected to the inner side of the edge of the connecting rod. The lower end of the ejector rod is fixedly connected to a moving plate, a pushing groove is formed inside the moving plate, and the push rod is nested inside the pushing groove.

[0008] Preferably, the inclined block is located below the docking groove. The inclined block forms a sliding structure with the adjustment cavity through the docking rod, and a spring is fixedly connected between the inner side of the inclined block and the inside of the adjustment cavity. The inclined block forms an elastic structure with the adjustment cavity through the spring.

[0009] Preferably, the pushing groove is formed obliquely on the moving plate. The push rod forms a sliding structure with the pushing groove through the connecting rod, and the moving plate drives the ejector rod to form a sliding structure with the first ejection groove through the push rod.

[0010] Preferably, an activity cavity is also formed at the center of the inner part of the lower mold base. The placement plate is nested inside the activity cavity, a second toothed plate is fixedly connected to the lower surface of the placement plate, a first toothed plate is fixedly connected to the side of the moving plate, a rotating shaft is nested inside the activity cavity, and a gear is fixedly connected to the outer side of the rotating shaft.

[0011] Preferably, the second toothed plate and the first toothed plate mesh with the gear, and the placement plate forms a sliding structure with the activity cavity through the second toothed plate.

[0012] Preferably, the secondary ejection mechanism includes an air supply airbag, which is fixedly connected to the lower surface of the placement plate, and the lower side of the air supply airbag is fixedly connected to the inner side of the movable cavity, the outer side of the auxiliary frame is fixedly connected with a connecting shaft, and the end side of the connecting shaft is nested and connected to the inside of the auxiliary ejection groove, and the inside of the auxiliary frame is nested and connected with a resistance plate, a pushing airbag is fixedly connected between the inner side of the resistance plate and the inside of the auxiliary frame, and an extrusion airbag is fixedly connected to the upper end of the outer side of the auxiliary frame, and the upper end of the extrusion airbag is fixedly connected to the inside of the auxiliary ejection groove, and connecting hoses are provided between the sides of the pushing airbag and the extrusion airbag and the air supply airbag.

[0013] Preferably, the abutment plate forms a sliding structure with the auxiliary frame by pushing the airbag, and the end side of the abutment plate is arranged in an arc-shaped structure.

[0014] Preferably, the auxiliary frame drives the connecting shaft and the auxiliary ejection groove to form a rotating structure by squeezing the airbag, and the placement plate can shield the contact plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] When the lower die base is separated from the upper die base, the docking rod arranged on the lower side of the upper die base is separated from the docking groove, and the docking groove does not interfere with the tilting block. At this time, the primary ejection mechanism operates, and the ejector rod can be driven to move upward through the primary ejection mechanism, thereby ejecting the mold;

[0017] When the tilting block is not affected by the resistance of the docking rod, the tilting block moves toward the side of the adjustment cavity under the drive of the elastic force of the spring. At this time, the tilting block can drive the push rod to move along the inside of the push groove through the connecting rod. While the push rod slides, it will synchronously resist and squeeze the moving plate, thereby driving the moving plate to slide vertically along the first ejection groove. During the sliding process, the moving plate will drive the ejector rod to move vertically synchronously, and the top end of the ejector rod extends into the lower mold cavity, thereby ejecting the mold, reducing the damage to the mold caused by direct manual demolding;

[0018] When the movable plate moves vertically, it will synchronously drive the gear meshing with it to rotate through the first tooth plate set on its side. At this time, the gear will synchronously drive the second tooth plate set on the other side to move downward. When the second tooth plate moves downward, it will synchronously drive the placement plate to move downward. At this time, the upper surface of the placement plate does not contact the bottom side of the mold. The downward force of the placement plate cooperates with the ejection force of the ejector rod, which can further improve the demolding effect of the mold and reduce the possibility of tearing of the adhesion between the un-ejected part and the lower mold cavity when the ejector rod ejects the mold.

[0019] When the placement plate moves downward, it will synchronously drive the secondary ejection mechanism to operate. Driven by the secondary ejection mechanism, the resistance plate can assist in ejecting the side of the mold, thereby reducing the possibility of damage to the edge of the mold during demolding.

[0020] When the placement plate moves downward, it will synchronously squeeze the air supply airbag. At this time, the gas inside the air supply airbag will be synchronously transported to the inside of the extrusion airbag and the push airbag through the connecting hose, pushing the airbag to expand, thereby pushing the contact plate to move along the outside of the auxiliary frame. At this time, the contact plate extends out of the auxiliary frame, pushing the airbag to expand, thereby squeezing the side of the auxiliary frame, so that the auxiliary frame drives the connecting shaft to rotate inside the auxiliary ejection groove. When the auxiliary frame rotates, it will synchronously drive the contact plate to rotate, thereby contacting the side of the mold, further assisting the mold in demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a three-dimensional cross-sectional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the lower mold base of the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the regulating cavity of the present invention;

[0025] Figure 5 It is a schematic diagram of a three-dimensional cross-sectional structure of a first ejection groove of the present invention;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the movable plate of the present invention;

[0027] Figure 7 It is a schematic diagram of the three-dimensional cross-sectional structure of the active cavity of the present invention;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the second tooth plate of the present invention;

[0029] Figure 9 It is a schematic diagram of a three-dimensional cross-sectional structure of the auxiliary frame of the present invention;

[0030] Figure 10 This is a schematic diagram of the auxiliary frame rotation structure of the present invention;

[0031] Figure 11 It is a schematic diagram of the three-dimensional cross-sectional structure of the auxiliary ejection groove of the present invention.

[0032] In the figure: 1. Lower die base; 2. Upper die base; 3. Lower die cavity; 4. Adjustment cavity; 5. Docking rod; 6. Docking groove; 7. Inclined block; 8. Link rod; 9. First ejection groove; 10. Auxiliary ejection groove; 11. Moving plate; 12. Pushing groove; 13. First toothed plate; 14. Second toothed plate; 15. Gear; 16. Rotating shaft; 17. Ejector rod; 18. Placing plate; 19. Air supply airbag; 20. Extrusion airbag; 21. Pushing airbag; 22. Auxiliary frame; 23. Connecting shaft; 24. Contact plate; 25. Activity cavity; 26. Push rod; 27. Spring; 28. Connecting hose. Detailed implementation mode

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment 1: As Figures 1-6 shown in the technical solution, the present invention provides the following technical solution: A dry engine cylinder block lost foam mold with an ejection function discloses a primary ejection mechanism, and the mold can be ejected through the primary ejection mechanism:

[0035] The lower die base 1 has a placing plate 18 arranged inside it, and a docking groove 6 is opened on the side of the placing plate 18. A docking rod 5 is nested and connected inside the docking groove 6. At the same time, the upper end of the docking rod 5 is fixedly connected to the upper die base 2. A lower die cavity 3 is opened at the center of the inside of the lower die base 1, and an adjustment cavity 4 is opened on the side of the lower die base 1. A first ejection groove 9 is opened on the side of the adjustment cavity 4, and an ejector rod 17 is nested and connected at the top of the first ejection groove 9. A primary ejection mechanism for initially ejecting the mold is arranged between the lower end of the ejector rod 17 and the inside of the adjustment cavity 4. The primary ejection mechanism includes an inclined block 7, which is nested and connected inside the adjustment cavity 4. A link rod 8 is fixedly connected to the inner side of the inclined block 7, and a push rod 26 is fixedly connected to the inner side of the edge end of the link rod 8. The lower end of the ejector rod 17 is fixedly connected to a moving plate 11, and a pushing groove 12 is opened inside the moving plate 11. The push rod 26 is nested and connected inside the pushing groove 12. The inclined block 7 is located below the docking groove 6, and the inclined block 7 forms a sliding structure with the adjustment cavity 4 through the docking rod 5. A spring 27 is fixedly connected between the inner side of the inclined block 7 and the inside of the adjustment cavity 4. At the same time, the inclined block 7 forms an elastic structure with the adjustment cavity 4 through the spring 27. The pushing groove 12 is obliquely opened on the moving plate 11. The push rod 26 forms a sliding structure with the pushing groove 12 through the link rod 8, and the moving plate 11 drives the ejector rod 17 to form a sliding structure with the first ejection groove 9 through the push rod 26.

[0036] When the lower mold base 1 is separated from the upper mold base 2, the docking rod 5 set on the lower side of the upper mold base 2 is disengaged from the docking groove 6, and the docking groove 6 does not interfere with the tilting block 7. At this time, the ejection mechanism is operated once, and the ejector rod 17 can be driven to move upward through the ejection mechanism, so as to eject the mold. When the tilting block 7 is not interfered by the docking rod 5, the tilting block 7 is driven by the elastic force of the spring 27 to move to the side of the adjusting cavity 4. At this time, the tilting block 7 can drive the push rod 26 to move along the inside of the push groove 12 through the connecting rod 8. While sliding, the push rod 26 will synchronously interfere and squeeze the moving plate 11, thereby driving the moving plate 11 to slide vertically along the first ejection groove 9. During the sliding process, the moving plate 11 will drive the ejector rod 17 to move vertically synchronously, and the top end of the ejector rod 17 extends into the lower mold cavity 3, thereby ejecting the mold, reducing the damage to the mold caused by direct manual demolding.

[0037] Embodiment 2: Figure 7 and Figure 8 The technical solution shown in the figure, the present invention provides the following technical solution: a dry engine cylinder lost foam mold with an ejection function, disclosing a second tooth plate 14, through which the possibility of tearing caused by the adhesion between the un-ejected part and the lower mold cavity 3 can be reduced:

[0038] An active cavity 25 is also provided at the inner center of the lower mold base 1, and the placement plate 18 is nested and connected inside the active cavity 25, and the lower surface of the placement plate 18 is fixedly connected to the second tooth plate 14, and the side of the movable plate 11 is fixedly connected to the first tooth plate 13, and the inside of the active cavity 25 is nested and connected to the rotating shaft 16, and the outer side of the rotating shaft 16 is fixedly connected to the gear 15, the second tooth plate 14 and the first tooth plate 13 are meshed with the gear 15, and the placement plate 18 forms a sliding structure with the active cavity 25 through the second tooth plate 14.

[0039] When the movable plate 11 moves vertically, it will synchronously drive the gear 15 meshing with it to rotate through the first tooth plate 13 set on its side. At this time, the gear 15 will synchronously drive the second tooth plate 14 set on the other side to move downward. When the second tooth plate 14 moves downward, it will synchronously drive the placement plate 18 to move downward. At this time, the upper surface of the placement plate 18 does not contact the bottom side of the mold. The downward force of the placement plate 18 and the ejection force of the ejector rod 17 cooperate with each other, which can further improve the demolding effect of the mold and reduce the possibility of tearing of the adhesion between the un-ejected part and the lower mold cavity 3 when the ejector rod 17 ejects the mold.

[0040] Embodiment 3: Figures 8-11The technical solution shown in the figure, the present invention provides the following technical solution: a dry engine cylinder lost foam mold with an ejection function, disclosing a secondary ejection mechanism, through which the possibility of damage to the edge of the mold during demolding can be reduced:

[0041] An auxiliary ejection groove 10 is also provided on the side of the lower mold base 1, and an auxiliary frame 22 is provided inside the auxiliary ejection groove 10, and a secondary ejection mechanism for assisting the ejection of the mold is provided between the inside of the auxiliary frame 22 and the inside of the lower mold base 1, and the secondary ejection mechanism includes an air supply airbag 19, the air supply airbag 19 is fixedly connected to the lower surface of the placement plate 18, and the lower side of the air supply airbag 19 is fixedly connected to the inner side of the active cavity 25, the outer side of the auxiliary frame 22 is fixedly connected to a connecting shaft 23, and the end side of the connecting shaft 23 is nested and connected to the inside of the auxiliary ejection groove 10, and the inside of the auxiliary frame 22 is nested and connected to a contact plate 24, and the contact plate A pushing airbag 21 is fixedly connected between the inner side of 24 and the interior of the auxiliary frame 22, and an extrusion airbag 20 is fixedly connected to the outer upper end of the auxiliary frame 22, and the upper end of the extrusion airbag 20 is fixedly connected to the inside of the auxiliary ejection groove 10, and a connecting hose 28 is provided between the sides of the pushing airbag 21 and the extrusion airbag 20 and the air supply airbag 19. The contact plate 24 forms a sliding structure with the auxiliary frame 22 through the pushing airbag 21, and the end side of the contact plate 24 is arranged in an arc-shaped structure. The auxiliary frame 22 drives the connecting shaft 23 to form a rotating structure with the auxiliary ejection groove 10 through the extrusion airbag 20, and the placement plate 18 can cover the contact plate 24.

[0042] When the placement plate 18 moves downward, it will synchronously drive the secondary ejection mechanism to operate. Driven by the secondary ejection mechanism, the contact plate 24 can assist in ejecting the side of the mold, thereby reducing the possibility of damage to the edge of the mold during demolding. When the placement plate 18 moves downward, it will synchronously squeeze the air supply airbag 19. At this time, the gas inside the air supply airbag 19 will be synchronously transported to the extrusion airbag 20 and the pushing airbag 21 through the connecting hose 28, pushing the airbag 21 to expand due to the gas, thereby pushing the contact plate 24 to move along the outside of the auxiliary frame 22. At this time, the contact plate 24 extends out of the auxiliary frame 22, pushing the airbag 21 to expand due to the gas, thereby squeezing the side of the auxiliary frame 22, so that the auxiliary frame 22 drives the connecting shaft 23 to rotate inside the auxiliary ejection groove 10. When the auxiliary frame 22 rotates, it will synchronously drive the contact plate 24 to rotate, thereby contacting the side of the mold, further assisting the mold in demolding.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A lost foam mold for a dry engine cylinder block with an ejection function, including a lower mold base (1). Inside the lower mold base (1), there is a placement plate (18). A docking groove (6) is opened on the side of the placement plate (18), and a docking rod (5) is nested and connected inside the docking groove (6). At the same time, the upper end of the docking rod (5) is fixedly connected to an upper mold base (2). It is characterized in that At the center of the inside of the lower mold base (1), a lower mold cavity (3) is opened. On the side of the lower mold base (1), an adjustment cavity (4) is opened. On the side of the adjustment cavity (4), a first ejection groove (9) is opened. At the top of the first ejection groove (9), a ejector rod (17) is nested and connected. Between the lower end of the ejector rod (17) and the inside of the adjustment cavity (4), there is a primary ejection mechanism for initially ejecting the mold. On the side of the lower mold base (1), there is also an auxiliary ejection groove (10). Inside the auxiliary ejection groove (10), there is an auxiliary frame (22). Between the inside of the auxiliary frame (22) and the inside of the lower mold base (1), there is a secondary ejection mechanism for assisting in ejecting the mold. The primary ejection mechanism includes an inclined block (7). The inclined block (7) is nested and connected inside the adjustment cavity (4). Inside the inclined block (7), a connecting rod (8) is fixedly connected. At the inner side of the edge of the connecting rod (8), a push rod (26) is fixedly connected. The lower end of the ejector rod (17) is fixedly connected to a moving plate (11). Inside the moving plate (11), a pushing groove (12) is opened. The push rod (26) is nested and connected inside the pushing groove (12). At the center of the inside of the lower mold base (1), there is also an activity cavity (25). The placement plate (18) is nested and connected inside the activity cavity (25). On the lower surface of the placement plate (18), a second toothed plate (14) is fixedly connected. On the side of the moving plate (11), a first toothed plate (13) is fixedly connected. Inside the activity cavity (25), a rotating shaft (16) is nested and connected. On the outer side of the rotating shaft (16), a gear (15) is fixedly connected. The second toothed plate (14) and the first toothed plate (13) are meshed with the gear (15). The placement plate (18) forms a sliding structure with the activity cavity (25) through the second toothed plate (14).

2. The lost foam mold for a dry engine block with an ejection function according to claim 1, characterized in that: The inclined block (7) is located below the docking groove (6). The inclined block (7) forms a sliding structure with the adjustment cavity (4) through the docking rod (5). Between the inner side of the inclined block (7) and the inside of the adjustment cavity (4), a spring (27) is fixedly connected. At the same time, the inclined block (7) forms an elastic structure with the adjustment cavity (4) through the spring (27).

3. The lost foam mold for a dry engine block with an ejection function according to claim 1, characterized in that: The pushing groove (12) is inclinedly opened on the moving plate (11). The push rod (26) forms a sliding structure with the pushing groove (12) through the connecting rod (8). The moving plate (11) drives the ejector rod (17) to form a sliding structure with the first ejection groove (9) through the push rod (26).

4. A lost foam mold for a dry engine block with an ejection function according to claim 1, characterized in that: The secondary ejection mechanism comprises an air supply bag (19), the air supply bag (19) being fixedly connected to the lower surface of the placement plate (18), and the lower side of the air supply bag (19) being fixedly connected to the inner side of the movable cavity (25), the outer side of the auxiliary frame (22) being fixedly connected to a connecting shaft (23), and the end side of the connecting shaft (23) being nested and connected to the inside of the auxiliary ejection groove (10), and the inside of the auxiliary frame (22) being nested and connected to a resistance plate (24), a pushing bag (21) being fixedly connected between the inner side of the resistance plate (24) and the inside of the auxiliary frame (22), and an extrusion bag (20) being fixedly connected to the upper end of the outer side of the auxiliary frame (22), and the upper end of the extrusion bag (20) being fixedly connected to the inside of the auxiliary ejection groove (10), and a connecting hose (28) being provided between the sides of the pushing bag (21) and the extrusion bag (20) and the air supply bag (19).

5. The lost foam mold for a dry engine block with an ejection function according to claim 4, characterized in that: The abutment plate (24) pushes the airbag (21) and the auxiliary frame (22) to form a sliding structure, and the end side of the abutment plate (24) is arranged in an arc-shaped structure.

6. The lost foam mold for a dry engine block with an ejection function according to claim 4, characterized in that: The auxiliary frame (22) drives the connecting shaft (23) and the auxiliary ejection groove (10) to form a rotating structure by squeezing the airbag (20), and the placement plate (18) can shield the contact plate (24).

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