Dry type engine cylinder block evanescent mode mold with ejection function

Abstract

The invention discloses a dry type engine cylinder block evanescent mode mold with an ejection function, and relates to the technical field of evanescent mode molds, the dry type engine cylinder block evanescent mode mold comprises a lower mold base, a placing plate is arranged in the lower mold base, a butt joint groove is formed in the side of the placing plate, and a butt joint rod is connected into the butt joint groove in a nested mode; and meanwhile, the upper end of the butt joint rod is fixedly connected with an upper die base. According to the dry type engine cylinder block evanescent mode mold with the ejection function, when the lower mold base is separated from the upper mold base, a butt joint rod arranged on the lower side of the upper mold base is separated from a butt joint groove, the butt joint groove does not abut against an inclined block, at the moment, a primary ejection mechanism operates, and an ejection rod can be driven to move upwards through the primary ejection mechanism; and when the placing plate moves downwards, the secondary ejection mechanism can be synchronously driven to operate, and the abutting plate can be driven by the secondary ejection mechanism to carry out auxiliary ejection on the side of the mold, so that the possibility that the edge of the mold is damaged during demolding is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of lost foam molds, in particular to a dry engine cylinder lost foam mold with an ejection function. Background Art

[0002] A dry engine block, also known as a linerless engine block, can be produced using a lost foam casting process. The lost foam casting process will not leave any residue in the final casting, which can improve the perfection of the finished dry engine block.

[0003] Prior art 1 (publication number: CN209062084U, Chinese patent with publication date of 2019-07-05) A lost foam mold for an engine cylinder block with a cylinder sleeve, the upper end surface of the stripping plate is flush with the upper end surface of the lower mold air chamber I; a driving mechanism is provided corresponding to the stripping plate; the upper end surface of the lower mold air chamber II of the cylinder block small piece mold has a water cavity small piece, an oil cavity small piece and a cylinder barrel small piece, which solves the problem that the sand in the cylinder barrel cooling water cavity of the engine cylinder block with a cylinder sleeve cannot be cleared, and realizes the automatic ejection of the white mold, shortening the product development cycle; there is also prior art 2 (publication number: CN111250654A, Chinese patent with publication date of 2020-06-09) A motor housing insert interchangeable lost foam mold is provided with a shock-absorbing cushion layer, an ozone generator and a push rod, which can reduce the vibration generated by the machine and protect the normal operation of the machine, and can also prevent harmful gases from polluting the mold workshop, and can make it more convenient to replace the mold inserts, so that people can save time and effort during use, suitable for different working conditions, and bring better prospects for use.

[0004] Although the existing technologies 1 and 2 can improve the processing efficiency, the mold body is mostly demolded manually during the removal process, and the lost foam is subjected to uneven force, which is prone to tearing and damage, thereby reducing the qualification rate of the mold. There are certain limitations, so we propose a dry engine cylinder lost foam mold with ejection function to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a dry engine cylinder lost foam mold with an ejection function to solve the problem raised in the above-mentioned background technology that the mold bodies currently on the market are mostly demolded manually during the removal process, and the lost foam is subjected to uneven force and is prone to tearing and damage, thereby reducing the qualified rate of the mold and having certain limitations.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dry engine cylinder block lost foam mold with an ejection function, comprising a lower mold base, a placement plate is arranged inside the lower mold base, a docking groove is arranged 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, a lower mold cavity is arranged at the inner center of the mold base, an adjustment cavity is arranged on the side of the lower mold base, a first ejection groove is arranged on the side of the adjustment cavity, and an ejector rod is nested and connected at the top of the first ejector groove, a primary ejection mechanism for preliminary ejection of 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 arranged on the side of the lower mold base, an auxiliary frame is arranged inside the auxiliary ejection groove, and a secondary ejection mechanism for auxiliary ejection of the mold is arranged between the inside of the auxiliary frame and the inside of the lower mold base.

[0007] Preferably, the one-time ejection mechanism includes a tilting block, which is nested and connected inside the adjusting cavity, and a connecting rod is fixedly connected to the inner side of the tilting block, and a push rod is fixedly connected to the inner side of the connecting rod end; the lower end of the ejector rod is fixedly connected to a movable plate, and a push groove is opened inside the movable plate, and the push rod is nested and connected inside the push groove.

[0008] Preferably, the tilting block is located below the docking groove, and the tilting 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 tilting block and the inside of the adjustment cavity, and the tilting block forms an elastic structure with the adjustment cavity through the spring.

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

[0010] Preferably, a movable cavity is also opened at the inner center of the lower mold base, the placement plate is nested and connected inside the movable cavity, and the lower surface of the placement plate is fixedly connected with a second tooth plate, the side of the movable plate is fixedly connected with a first tooth plate, a rotating shaft is nested and connected inside the movable cavity, and a gear is fixedly connected to the outer side of the rotating shaft.

[0011] Preferably, the second tooth plate and the first tooth plate are meshed with the gear, and the placement plate forms a sliding structure with the movable cavity through the second tooth 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: 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; 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; 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. 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. 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

[0016] Figure 1 It is a schematic diagram of a three-dimensional cross-sectional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the lower mold base of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the regulating cavity of the present invention; Figure 5 It is a schematic diagram of a three-dimensional cross-sectional structure of a first ejection groove of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the movable plate of the present invention; Figure 7 It is a schematic diagram of the three-dimensional cross-sectional structure of the active cavity of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the second tooth plate of the present invention; Fig. 9 It is a schematic diagram of a three-dimensional cross-sectional structure of the auxiliary frame of the present invention; Fig.10 This is a schematic diagram of the auxiliary frame rotation structure of the present invention; Fig.11 It is a schematic diagram of the three-dimensional cross-sectional structure of the auxiliary ejection groove of the present invention.

[0017] In the figure: 1. lower die base; 2. upper die base; 3. lower die cavity; 4. adjusting cavity; 5. docking rod; 6. docking groove; 7. tilting block; 8. connecting rod; 9. first ejection groove; 10. auxiliary ejection groove; 11. moving plate; 12. pushing groove; 13. first tooth plate; 14. second tooth 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. movable cavity; 26. push rod; 27. spring; 28. connecting hose. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment 1: Figure 1-Figure 6 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, a one-time ejection mechanism is disclosed, and the mold can be ejected by the one-time ejection mechanism: A lower die base 1, a placement plate 18 is provided inside the lower die base 1, and a docking groove 6 is provided on the side of the placement plate 18, and a docking rod 5 is nested and connected inside the docking groove 6, and the upper end of the docking rod 5 is fixedly connected to the upper die base 2, a lower die cavity 3 is provided at the inner center of the lower die base 1, and an adjustment cavity 4 is provided on the side of the lower die base 1, and a first ejection groove 9 is provided on the side of the adjustment cavity 4, and a top of the first ejection groove 9 is nested and connected with an ejector rod 17, and a one-time ejection mechanism for preliminary ejection of the mold is provided between the lower end of the ejector rod 17 and the inside of the adjustment cavity 4, and the one-time ejection mechanism includes a tilting block 7, the tilting block 7 is nested and connected inside the adjustment cavity 4, and a connecting rod 8 is fixedly connected to the inner side of the tilting block 7, and A push rod 26 is fixedly connected to the inner side of the edge end of the connecting rod 8; the lower end of the push rod 17 is fixedly connected to the movable plate 11, and a push groove 12 is opened inside the movable plate 11, and the push groove 12 is nested with the push rod 26, the tilting block 7 is located below the docking groove 6, and the tilting block 7 forms a sliding structure with the adjusting cavity 4 through the docking rod 5, and a spring 27 is fixedly connected between the inner side of the tilting block 7 and the inside of the adjusting cavity 4, and at the same time, the tilting block 7 forms an elastic structure with the adjusting cavity 4 through the spring 27, the push groove 12 is opened on the movable plate 11 in an inclined shape, the push rod 26 forms a sliding structure with the push groove 12 through the connecting rod 8, and the movable plate 11 drives the push rod 17 and the first ejection groove 9 to form a sliding structure through the push rod 26.

[0020] 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.

[0021] 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: 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.

[0022] 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.

[0023] Embodiment 3: Figure 8-Figure 11 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 secondary ejection mechanism, through which the possibility of damage to the edge of the mold during demolding can be reduced: 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.

[0024] 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.

[0025] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dry engine cylinder block lost foam mold with an ejection function, comprising a lower mold base (1), a placement plate (18) being arranged inside the lower mold base (1), a docking groove (6) being provided on the side of the placement plate (18), a docking rod (5) being nested and connected inside the docking groove (6), and an upper mold base (2) being fixedly connected to the upper end of the docking rod (5); It is characterized in that A lower mold cavity (3) is provided at the center of the lower mold base (1), and an adjustment cavity (4) is provided on the side of the lower mold base (1), and a first ejection groove (9) is provided on the side of the adjustment cavity (4), and a push rod (17) is nested and connected to the top of the first ejection groove (9), and a primary ejection mechanism capable of performing preliminary ejection of the mold is provided between the lower end of the push rod (17) and the inside of the adjustment cavity (4), and 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 capable of performing auxiliary ejection of the mold is provided between the inside of the auxiliary frame (22) and the inside of the lower mold base (1).

2. The dry engine cylinder lost foam mold with ejection function according to claim 1, characterized in that: The one-time ejection mechanism comprises a tilting block (7), the tilting block (7) being nested and connected inside the adjustment cavity (4), a connecting rod (8) being fixedly connected to the inner side of the tilting block (7), and a push rod (26) being fixedly connected to the inner side of the side end of the connecting rod (8); the lower end of the ejector rod (17) is fixedly connected to a moving plate (11), a pushing groove (12) is provided inside the moving plate (11), and a push rod (26) is nested and connected inside the pushing groove (12).

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

4. The dry engine cylinder lost foam mold with ejection function according to claim 2, characterized in that: The pushing groove (12) is provided on the movable plate (11) in an inclined shape, the pushing rod (26) forms a sliding structure with the pushing groove (12) via a connecting rod (8), and the movable plate (11) drives the ejector rod (17) via the pushing rod (26) to form a sliding structure with the first ejection groove (9).

5. The dry engine cylinder lost foam mold with ejection function according to claim 2, characterized in that: A movable cavity (25) is also provided at the inner center of the lower die base (1), the placement plate (18) is nested and connected inside the movable cavity (25), and a second tooth plate (14) is fixedly connected to the lower surface of the placement plate (18), a first tooth plate (13) is fixedly connected to the side of the movable plate (11), a rotating shaft (16) is nested and connected inside the movable cavity (25), and a gear (15) is fixedly connected to the outer side of the rotating shaft (16).

6. The dry engine cylinder lost foam mold with ejection function according to claim 5, characterized in that: 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 movable cavity (25) through the second tooth plate (14).

7. The dry engine cylinder lost foam mold with ejection function according to claim 5, characterized in that: The secondary ejection mechanism comprises an air supply bag (19), the air supply bag (19) is fixedly connected to the lower surface of the placement plate (18), and the lower side of the air supply bag (19) is fixedly connected to the inner side of the movable 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), a push bag (21) is fixedly connected between the inner side of the contact plate (24) and the inside of the auxiliary frame (22), and the upper end of the outer side of the auxiliary frame (22) is fixedly connected to an extrusion bag (20), and the upper end of the extrusion bag (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 push bag (21) and the extrusion bag (20) and the air supply bag (19).

8. The dry engine cylinder lost foam mold with ejection function according to claim 7, 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.

9. The dry engine cylinder lost foam mold with ejection function according to claim 7, 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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