Ejection device for a core box

Abstract

This utility model relates to the field of core box devices, and discloses a core box ejection device, including a lower mold. An ejection mechanism is provided on the outer sidewall surface of the lower mold. The ejection mechanism includes a knob, and a bidirectional threaded rod is fixedly connected to the bottom end of the knob. A connecting block is threadedly connected to the surface of the bidirectional threaded rod. A hinged rod b is hinged to the upper surface of the connecting block. A connecting plate is hinged to the end of the hinged rod b away from the connecting block. A push rod is fixedly connected to the upper surface of the connecting plate. An opening and closing plate is rotatably connected to the inner wall of the inlet. In this utility model, the ejection mechanism, by rotating the knob, drives the bidirectional threaded rod to rotate, causing the connecting blocks to move closer or further apart on the threaded rod, achieving the effect of moving the push rod up and down. Simultaneously, the ejection mechanism has three push rods, increasing the contact area between the push rods and the core box, reducing the problem of twisting and deformation of the core box due to uneven force.

Description

Technical Field

[0001] This utility model relates to the field of core box devices, and in particular to a core box ejection device. Background Technology

[0002] A core box is a process equipment used to manufacture cores, mainly in the foundry industry. It is used to shape core sand into cores of a specific shape to form the internal cavity or hole structure of the casting.

[0003] However, the existing core boxes do not have an ejection device, which may have a series of impacts on the demolding efficiency, product quality and mold maintenance of sand core production. For example, demolding is difficult, production efficiency is low, and manual demolding is required. Manual demolding may result in uneven force, which may cause deformation and damage to the sand core, increasing safety hazards and operational risks. Therefore, an ejection device for the core box is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a core box ejection device, which aims to improve the problems of difficult demolding by force, low production efficiency, reliance on manual demolding, and the risk of uneven force distribution leading to deformation and damage to the sand core in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an ejection device for a core box, comprising a lower mold, wherein an ejection mechanism is provided on the outer sidewall surface of the lower mold;

[0006] The ejection mechanism includes a knob, the bottom end of which is fixedly connected to a bidirectional threaded rod, the surface of which is threadedly connected to a connecting block, the upper surface of which is hinged to a hinge rod b, the end of which is hinged away from the connecting block to a connecting plate, and the upper surface of which is fixedly connected to a push rod.

[0007] As a further description of the above technical solution:

[0008] A condenser tube is provided on the inner side of the lower mold, and a condenser tube opening and closing mechanism is provided on the outer sidewall surface of the lower mold.

[0009] The condenser tube opening and closing mechanism includes a water inlet, an opening and closing plate rotatably connected to the inner wall of the water inlet, a gear a rotatably connected to the outer wall of the water inlet, a rack a meshing on the surface of the gear a, a hinge rod a hinged to the lower surface of the rack a, a rack b hinged to the end of the hinge rod a away from the rack a, a gear b meshing on the lower surface of the rack b, and a water outlet fixedly connected to the outer sidewall of the lower mold.

[0010] As a further description of the above technical solution:

[0011] The outer wall of the connecting plate is slidably connected to the inner wall of the lower mold.

[0012] As a further description of the above technical solution:

[0013] The inner wall of the bottom end of the lower mold is provided with a sliding groove, and the outer wall of the push rod passes through and is slidably connected to the inner wall of the sliding groove of the lower mold.

[0014] As a further description of the above technical solution:

[0015] The bidirectional threaded rod is rotatably connected to the inner wall of the lower mold.

[0016] As a further description of the above technical solution:

[0017] The back of rack a is provided with a protrusion, and a set of vertical grooves are opened on the outer side wall of the lower mold. The protrusion on the back of rack a is slidably connected in the vertical groove of the outer wall of the lower mold. The back of rack b is provided with a protrusion, and a set of horizontal grooves are opened on the outer side wall of the lower mold. The protrusion on rack b is slidably connected in the horizontal groove of the outer wall of the lower mold. The opening and closing plate is rotatably connected to the rotation center shaft of gear a.

[0018] As a further description of the above technical solution:

[0019] The rotation center axis of the knob is fixedly connected to gear b, and gear b is fixedly connected to the rotation center axis of the bidirectional threaded rod.

[0020] As a further description of the above technical solution:

[0021] The water inlet is fixedly connected to one side of the condenser tube, and the other side of the condenser tube is fixedly connected to the water outlet.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, an ejection mechanism is provided. By rotating the knob, the bidirectional threaded rod is driven to rotate, so that the connecting blocks move closer or further apart on the threaded rod to achieve the effect of moving the ejector rod up and down. At the same time, the ejection mechanism is provided with three ejector rods, which increases the contact area between the ejector rods and the core box, reduces the problem of twisting and deformation of the core box due to uneven force, and distributes the ejection force on three points, reducing the possibility of deformation or damage to the product or sand core due to uneven force.

[0024] 2. In this utility model, by setting a condenser tube opening and closing mechanism, the opening and closing of the valve port is controlled by rotating the knob to drive the gear rack. The opening and closing of the valve port controls the cooling water to enter the inner wall of the core box. The cooling water circulates in the inner wall of the core box to quickly cool down the sand core in the core box, making it easier to demold. This solves the problems of thermal deformation, uneven curing, and equipment wear during the demolding process. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the lower mold of the ejection device for a core box proposed in this utility model;

[0026] Figure 2 This is a partial three-dimensional structural cross-sectional view of the lower mold of the ejection device for a core box proposed in this utility model;

[0027] Figure 3 This is a partial three-dimensional structural cross-sectional view of the lower mold of the ejection device for a core box proposed in this utility model;

[0028] Figure 4 This is a partial three-dimensional structural cross-sectional view of the lower mold of the ejection device for a core box proposed in this utility model;

[0029] Figure 5 This is a schematic diagram of a partial three-dimensional structure of the condenser tube of the ejection device for a core box according to the present invention.

[0030] Figure 6 This is a partial three-dimensional structural cross-sectional view of the water inlet of the ejection device for a core box proposed in this utility model.

[0031] Legend:

[0032] 1. Lower mold; 2. Condenser tube opening and closing mechanism; 21. Water inlet; 22. Opening and closing plate; 23. Gear a; 24. Rack a; 25. Hinge rod a; 26. Rack b; 27. Gear b; 28. Condenser tube; 29. ​​Water outlet; 3. Ejection mechanism; 31. Two-way threaded rod; 32. Connecting block; 33. Hinge rod b; 34. Connecting plate; 35. Ejector rod; 36. Knob. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-3 One embodiment of this utility model is a core box ejection device, which includes a lower mold 1. The lower mold 1 is a fixed half mold installed on the worktable of a press or molding equipment. It cooperates with the movable upper mold to complete the material forming. The lower mold 1 plays a key role in forming processes such as stamping, casting, and injection molding. An ejection mechanism 3 is provided on the outer sidewall surface of the lower mold 1.

[0035] Reference Figures 1-3The ejection mechanism 3 includes a knob 36, the rotation center axis of which is fixedly connected to a gear b27. Twisting the knob 36 drives the gear b27, which is fixedly connected to the rotation center axis of the bidirectional threaded rod 31. The rotation of the gear b27 drives the bidirectional threaded rod 31 to rotate. The bidirectional threaded rod 31 is rotatably connected to the inner wall of the lower mold 1, and the lower mold 1 supports the bidirectional threaded rod 31. The bidirectional threaded rod 31 is provided with two sets of threads with opposite directions of rotation. A connecting block 32 is threadedly connected to the surface of the bidirectional threaded rod 31, and the bidirectional threaded rod 31 supports the connecting block 32. The inner wall of the connecting block 32 is provided with a threaded groove. A hinge rod b33 is hinged to the upper surface of the connecting block 32, and the connecting block 32 supports the hinge rod b33. A connecting plate 34 is hinged to the end of the hinge rod b33 away from the connecting block 32. The outer wall of the connecting plate 34 is slidably connected to the inner wall of the lower mold 1, and the lower mold 1 supports the connecting plate 34. A push rod 35 is fixedly connected to the upper surface of the connecting plate 34, and the connecting plate 34 supports the push rod 35. A groove is opened on the inner wall of the bottom end of the lower mold 1. The outer wall of the push rod 35 passes through and is slidably connected to the inner wall of the groove of the lower mold 1. The push rod 35 slides back and forth on the inner wall of the groove, which can eject the core box in the mold.

[0036] Reference Figures 2-4 The inner side of the lower mold 1 is provided with a condenser pipe 28. The condenser pipe 28 carries away the hot air of the core box through the circulation of cooling water, thereby reducing its temperature. Its core functions include process optimization, equipment protection, safety and environmental protection. The outer side wall surface of the lower mold 1 is provided with a condenser pipe opening and closing mechanism 2.

[0037] Reference Figures 2-4 The condenser tube opening and closing mechanism 2 includes a water inlet 21, which is fixedly connected to one side of the condenser tube 28. Cooling water is input into the condenser tube 28 through the water inlet 21. The other side of the condenser tube 28 is fixedly connected to the water outlet 29. After cooling is completed, the water in the condenser tube 28 is discharged through the water outlet 29. The water outlet 29 is fixedly connected to the outer side wall of the lower mold 1. The lower mold 1 supports the water outlet 29. The inner wall of the water outlet 29 is rotatably connected to an opening and closing plate 22. The opening and closing plate 22 can control whether water enters the condenser tube 28 by opening and closing.

[0038] Reference Figure 3 and Figures 5-6The opening and closing plate 22 is rotatably connected to the rotation center shaft of gear a23. Rotating gear a23 can drive the opening and closing plate 22 to open and close. Gear a23 is rotatably connected to the outer wall of water inlet 21, and water inlet 21 supports gear a23. A rack a24 meshes with the surface of gear a23. Rotating gear a23 drives rack a24 to slide up and down. A protrusion is provided on the back of rack a24. A set of vertical grooves is opened on the outer side wall of the lower mold 1. The protrusion on the back of rack a24 is slidably connected in the vertical grooves on the outer wall of the lower mold 1. The vertical grooves allow rack a24 to slide back and forth in a fixed position. The lower mold 1 supports rack a24. The back of the 6 is provided with a protrusion. A set of transverse grooves is opened on the outer side wall of the lower mold 1. The protrusion of the rack b26 is slidably connected in the transverse groove of the outer wall of the lower mold 1. The transverse groove allows the rack b26 to slide back and forth in a fixed position. The lower mold 1 supports the rack b26. The lower surface of the rack a24 is hinged with a hinge rod a25. The hinge rod a25 moves and drives the rack a24 to slide up and down. The end of the hinge rod a25 away from the rack a24 is hinged with the rack b26. The rack b26 slides left and right and drives the hinge rod a25 to move left and right. The lower surface of the rack b26 is meshed with a gear b27. The rotation of the gear b27 drives the rack b26 to slide left and right.

[0039] Working principle: When demolding the sand core inside the core box, the knob 36 can be turned. The rotation will cause gear b27 to rotate around the center. The rotation of gear b27 will cause the upper meshing rack b26 to slide to the right. The sliding of rack b26 to the right will cause the upper hinge rod a25 to slide to the right. The sliding of hinge rod a25 to the right will apply an upward force to rack a24, pushing rack a24 to slide upward. The upward sliding of rack a24 will cause gear a23 to rotate around the center. The rotation of gear a23 will cause the opening and closing plate 22 on the inner wall of the water inlet 21 to open and close. This can control the cooling water to enter the condenser pipe 28, cool the sand core inside the core box, and make it easier to demold. This solves problems such as thermal deformation, uneven curing, and equipment wear during the demolding process.

[0040] Meanwhile, as the knob 36 rotates, it drives the bidirectional threaded rod 31 to rotate around the center. The rotation of the bidirectional threaded rod 31 around the center causes the two sets of connecting blocks 32 on the surface to move towards each other. The two sets of connecting blocks 32 cause the two sets of hinge rods b33 to move towards each other. The movement of the hinge rods b33 towards each other applies an upward force to the top connecting plate 34. The upward movement of the connecting plate 34 causes the ejector rod 35 to move upward, ejecting the core box on the inner wall of the lower mold 1. The three ejector rods 35 make the ejection force distribution more even, increase the contact area between the ejector rod 35 and the core box, and solve the problem of twisting and deformation of the sand core due to uneven force.

[0041] If you want to reset the push rod 35 after it has been ejected, simply turn the knob 36 to the right. The knob 36 will drive the gear b27 to rotate to the right. The gear b27 will drive the bidirectional threaded rod 31 to rotate. The rotation of the bidirectional threaded rod 31 will cause the two sets of connecting blocks 32 on the surface to move away from each other. The two sets of connecting blocks 32 moving away from each other will cause the two sets of hinge rods b33 to move away from each other. The two sets of hinge rods b33 moving away from each other will pull the connecting plate 34 to move downward. The downward movement of the connecting plate 34 will reset the push rod 35.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ejection device for a core box, comprising a lower mold (1), characterized in that: The lower mold (1) is provided with an ejection mechanism (3) on the outer side wall surface; The ejection mechanism (3) includes a knob (36), the bottom end of which is fixedly connected to a bidirectional threaded rod (31), the surface of which is threadedly connected to a connecting block (32), the upper surface of which is hinged to a hinge rod b (33), the end of which is away from the connecting block (32) is hinged to a connecting plate (34), and the upper surface of which is fixedly connected to a push rod (35).

2. The ejection device for a core box according to claim 1, characterized in that: A condenser tube (28) is provided on the inner side of the lower mold (1), and a condenser tube opening and closing mechanism (2) is provided on the outer side wall surface of the lower mold (1). The condenser tube opening and closing mechanism (2) includes a water inlet (21), an opening and closing plate (22) is rotatably connected to the inner wall of the water inlet (21), a gear a (23) is rotatably connected to the outer wall of the water inlet (21), a rack a (24) is meshed on the surface of the gear a (23), a hinge rod a (25) is hinged to the lower surface of the rack a (24), a rack b (26) is hinged to the end of the hinge rod a (25) away from the rack a (24), a gear b (27) is meshed on the lower surface of the rack b (26), and a water outlet (29) is fixedly connected to the outer side wall of the lower mold (1).

3. The ejection device for a core box according to claim 1, characterized in that: The outer wall of the connecting plate (34) is slidably connected to the inner wall of the lower mold (1).

4. The ejection device for a core box according to claim 1, characterized in that: The inner wall of the bottom end of the lower mold (1) is provided with a sliding groove, and the outer wall of the push rod (35) passes through and is slidably connected to the inner wall of the sliding groove of the lower mold (1).

5. The ejection device for a core box according to claim 1, characterized in that: The bidirectional threaded rod (31) is rotatably connected to the inner wall of the lower mold (1).

6. The ejection device for a core box according to claim 2, characterized in that: The back of the rack a (24) is provided with a protrusion, and the outer side wall of the lower mold (1) is provided with a set of vertical grooves. The protrusion on the back of the rack a (24) is slidably connected in the vertical groove of the outer wall of the lower mold (1). The back of the rack b (26) is provided with a protrusion, and the outer side wall of the lower mold (1) is provided with a set of horizontal grooves. The protrusion on the rack b (26) is slidably connected in the horizontal groove of the outer wall of the lower mold (1). The opening and closing plate (22) is rotatably connected to the rotation center shaft of the gear a (23).

7. The ejection device for a core box according to claim 2, characterized in that: The rotation center axis of the knob (36) is fixedly connected to the gear b (27), and the gear b (27) is fixedly connected to the rotation center axis of the bidirectional threaded rod (31).

8. The ejection device for a core box according to claim 2, characterized in that: The inlet (21) is fixedly connected to one side of the condenser tube (28), and the other side of the condenser tube (28) is fixedly connected to the outlet (29).

Images