Sealing member
By designing a sealing member including a main body, through hole and wrapping part in the sand core manufacturing equipment, the problem of mold release mechanism under interference from sand accumulation is solved, and the quality of the sand core and the production efficiency are improved.
Patent Information
- Application Number
- CN202421845401.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-01
AI Technical Summary
In sand core manufacturing equipment, the accumulation of molded sand will interfere with the movement accuracy of the lower mold release mechanism, resulting in defects in the sand core. In the prior art, the use of sealing rings or sand-blocking cloth sleeves have problems such as hindering the fallback movement or limited service life.
A sealing member is designed, including a body, a through hole and a skirt, which matches the through hole, which allows the ejection mechanism to pass through, and the skirt is close to the edge of the through hole to prevent the molded sand from falling into.
Effectively preventing molded sand from entering the down mold release device, reducing the occurrence of sand core defects, avoiding frequent disassembly and cleaning of equipment, reducing operating and maintenance costs, and improving production efficiency.
Smart Images
Figure CN222931787U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of core-making equipment, and particularly to a sealing member of core-making equipment. Background Art
[0002] Core-making equipment is a mechanical device for making cores with molding sand. The core-making equipment often used in the field of vehicle manufacturing is a core shooter. The core shooter usually has a large equipment framework and a workbench, and is used to manufacture cores of vehicle parts with complex structures, such as cores of engines.
[0003] The equipment framework usually bears a molding sand injection mechanism, a pressurizing mechanism, an upper core box moving mechanism, an upper core box, an upper demolding mechanism, etc. The workbench usually includes a lower core box bearing mechanism, a lower core box moving and guiding mechanism, a lower demolding mechanism, etc.
[0004] During the manufacturing process and demolding process of the core, a part of the molding sand will continuously fall into the workbench area and accumulate in the lower demolding mechanism, interfering with the moving accuracy of the lower demolding mechanism, causing the moving path of the lower demolding mechanism to deviate, and colliding with other equipment, resulting in wear. When the lower demolding mechanism ejects the already manufactured core out of the lower core box for demolding, when the molding sand accumulates too much, the moving path deviation of the lower demolding mechanism will cause defects such as cracks, local looseness, porosity, and fracture in the core.
[0005] In order to ensure the final quality of the core, it is necessary to periodically disassemble the equipment in the workbench area to clean the molding sand that has fallen into the lower demolding mechanism. After cleaning, the equipment in the workbench area needs to be reassembled, and after the overall clamping test of the core shooter, the core shooter can be used again. This increases the time cost, energy cost, and labor cost of using the core shooter, and reduces the production efficiency of the core. For large core shooters, the disassembly, assembly, and debugging operations of the equipment also pose safety hazards to the operators.
[0006] In the prior art, it is found that if a sealing ring is directly added to the moving parts of the lower demolding mechanism, the sealing ring will hinder the falling-back movement of the lower demolding mechanism after demolding. If a sand-blocking cloth sleeve is arranged in the lower demolding mechanism, on the one hand, the service life of the sand-blocking cloth sleeve is limited, and on the other hand, the molding sand still interferes with the movement of the lower demolding mechanism after accumulating in the cloth sleeve. Utility Model Content
[0007] The purpose of the present disclosure is to solve one or more of the above problems and achieve additional advantages.
[0008] The present disclosure provides a sealing member, characterized in that the sealing member is used in a core manufacturing device for manufacturing cores using molding sand. The core manufacturing device at least includes a lower demolding device and a lower core box carrying device. The lower demolding device at least includes an ejection mechanism. The lower core box carrying device has at least one through hole, and the size of the at least one through hole is set to allow the ejection mechanism to move between a rest low position and an ejection high position through the at least one through hole. Wherein, the sealing member includes a main body and a skirt connected to the lower end of the main body. The outer contour of the skirt is set to expand in a direction away from the main body, so that when the sealing member is installed in a corresponding through hole of the at least one through hole, the skirt can closely adhere to the corresponding through hole to prevent the molding sand from falling into the lower demolding device. The interior of the sealing member has a through hole, and the size of the through hole is set to fit the size of the ejection mechanism, so that when the sealing member is installed in a corresponding through hole of the at least one through hole, the ejection mechanism can pass through the through hole while the molding sand cannot pass through the through hole and fall into the lower demolding device.
[0009] According to an embodiment of the present disclosure, the sealing member further includes a head provided at the upper end of the main body, and the size of the head is larger than that of the main body, so that the head forms a radially extending shoulder relative to the main body.
[0010] According to an embodiment of the present disclosure, the size of the head is greater than or equal to the size of the at least one through hole, so that the head is arranged on the outer side surface at the upper end of the at least one through hole.
[0011] According to an embodiment of the present disclosure, the outer surface of the head serves as a guiding surface to guide the molding sand to slide along the outer surface of the head and accumulate on the outer side surface at the upper end of the at least one through hole.
[0012] According to an embodiment of the present disclosure, the outer surface of the head has a cylindrical or frustoconical contour.
[0013] According to an embodiment of the present disclosure, the height of the sealing member is between 42 mm and 46 mm, the diameter of the main body is between 36 mm and 40 mm, and the maximum diameter of the skirt is between 41 mm and 45 mm.
[0014] According to an embodiment of the present disclosure, when the sealing member is installed in a corresponding through hole of the at least one through hole, there is a radial gap between the main body and the corresponding through hole, while the skirt closely adheres to the corresponding through hole to prevent the molding sand that enters the radial gap from falling into the lower demolding device.
[0015] According to an embodiment of the present disclosure, the outer contour dimension of the skirt is larger than the dimension of the at least one through hole, and when the sealing member is installed in the corresponding through hole of the at least one through hole, the outer contour dimension of the skirt becomes smaller so that the skirt fits tightly in the corresponding through hole.
[0016] According to an embodiment of the present disclosure, the diameter of the head is between 42 mm and 47 mm, and the height is between 12 mm and 17 mm.
[0017] According to an embodiment of the present disclosure, at least one slit is provided in the skirt, and the slit can be tightened to reduce the outer contour dimension of the skirt.
[0018] According to an embodiment of the present disclosure, the slit extends linearly or spirally in the skirt.
[0019] According to an embodiment of the present disclosure, a plurality of slits are provided in the skirt, and the plurality of slits are distributed evenly or unevenly in the skirt.
[0020] According to an embodiment of the present disclosure, the width of the slit is between 2 mm and 4 mm, and the height of the slit is between 14 mm and 18 mm.
[0021] The present disclosure also provides a sealing member, characterized in that the sealing member is used in a core manufacturing device for manufacturing cores with molding sand. The core manufacturing device at least includes a lower demolding device and a lower core box carrying device. The lower demolding device at least includes an ejection mechanism. The lower core box carrying device has at least one through hole, and the size of the at least one through hole is set to allow the ejection mechanism to move between a rest low position and an ejection high position through the at least one through hole. Wherein, the sealing member includes a main body and a head provided at the upper end of the main body. The size of the head is larger than the size of the main body, so that the head forms a radially extending shoulder relative to the main body. The inside of the sealing member has a through hole, and the size of the through hole is set to fit the size of the ejection mechanism, so that when the sealing member is installed in the corresponding through hole of the at least one through hole, the ejection mechanism can pass through the through hole and molding sand cannot pass through the through hole and fall into the lower demolding device.
[0022] According to an embodiment of the present disclosure, the sealing member further includes a skirt connected to the lower end of the main body. The outer contour of the skirt is set to expand in a direction away from the main body, so that when the sealing member is installed in the corresponding through hole of the at least one through hole, the skirt can fit tightly in the corresponding through hole to prevent molding sand from falling into the lower demolding device.
[0023] It should be noted that aspects of the present disclosure described for one embodiment can be incorporated into other different embodiments, although not specifically described for those other different embodiments. In other words, all embodiments and / or features of any embodiment can be combined in any way and / or combination as long as they do not contradict each other.
[0024] The sealing member according to the present disclosure is convenient for installation into the through hole of the square workbench of the core shooter. It can be inserted into through holes of different sizes, which neither affects the normal operation of the lower demolding mechanism nor allows core sand to fall into the lower demolding mechanism through the through hole. This eliminates the need to periodically disassemble the workbench of the core shooter to clean the molding sand in the lower demolding mechanism, reduces the downtime of the core shooter, and reduces the equipment operation and maintenance cost. The lower demolding mechanism without the accumulation of core sand does not affect the core demolding quality, thereby improving the production efficiency of the core shooter. In addition to the core shooter, the sealing member according to the present disclosure is also suitable for installation into holes in other equipment that require similar sealing operations. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] To more clearly illustrate the technical solutions of the present disclosure, some specific embodiments given only as examples will be described below with reference to the drawings, wherein:
[0026] Figure 1 is a partial perspective view of the workbench of a core shooter according to an embodiment of the present disclosure, showing the lower core box carrying mechanism;
[0027] Figure 2 is a partial top view of the workbench of a core shooter according to an embodiment of the present disclosure, showing the lower core box carrying mechanism;
[0028] Figure 3 is a partial perspective view of the workbench of a core shooter according to an embodiment of the present disclosure, showing the lower demolding mechanism in the retracted position. The lower core box carrying mechanism is not shown in the figure to expose the lower demolding mechanism;
[0029] Figure 4 is a partial perspective view of the workbench of a core shooter according to an embodiment of the present disclosure, showing the lower demolding mechanism in the ejected position. The lower core box carrying mechanism is not shown in the figure to expose the lower demolding mechanism;
[0030] Figure 5 is a cross-sectional view of a core ejector rod installed in the workbench according to an embodiment of the present disclosure, with the core ejector rod in the retracted position;
[0031] Figure 6 is a cross-sectional view of a sealing member according to an embodiment of the present disclosure;
[0032] Figure 7 is a top view of a sealing member according to an embodiment of the present disclosure.
[0033] It should be understood that in all the drawings, the same reference numerals denote the same elements. In the drawings, for the sake of clarity, the dimensions of some features may be changed and are not drawn to scale. Detailed Description of the Invention
[0034] The present disclosure will hereinafter be described with reference to the accompanying drawings, in which several embodiments of the present disclosure are shown. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and to fully explain the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.
[0035] It should be understood that the terms used in the specification are only for describing specific embodiments and are not intended to limit the present disclosure. All terms used in the specification (including technical terms and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of brevity and / or clarity, well-known functions or structures may not be described in detail.
[0036] The singular forms "a", "the" and "said" used in the specification include the plural forms unless clearly specified. The terms "comprising", "including" and "containing" used in the specification indicate the presence of the claimed features, but do not exclude the presence of one or more other features. The term "and / or" used in the specification includes any and all combinations of one or more of the related listed items.
[0037] In the specification, when it is said that an element is "on", "attached to", "connected to", "coupled to" or "in contact with" another element, etc., the element can be directly on, attached to, connected to, coupled to or in contact with the other element, or there may be an intermediate element.
[0038] In the specification, the terms "first", "second", "third", etc. are only used for convenience of description and are not intended to limit. Any technical features represented by "first", "second", "third", etc. are interchangeable.
[0039] In the specification, spatial relationship terms such as "upper", "lower", "front", "rear", "top", "bottom", etc. may describe the relationship between one feature and another in the drawings. It should be understood that the spatial relationship terms include not only the orientations shown in the drawings but also different orientations during the use or operation of the device. For example, when the device in the drawing is inverted, a feature originally described as "below" other features may then be described as "above" the other features. The device can also be oriented in other ways (rotated 90 degrees or in other orientations), and the relative spatial relationships will be correspondingly interpreted.
[0040] In particular, the spatial relationship terms such as "upper", "lower", "inner", "outer", etc. referred to in the present disclosure refer to the direction of the device, and "radial" refers to the radial direction of a hole or a rod.
[0041] First, with reference to Figures 1 to 4 , an embodiment of the workbench of a core shooter conforming to the present disclosure will be described.
[0042] The workbench 1 of the core shooter may at least include a lower core box carrying device 2 ( Figure 1 and Figure 2 ) and a lower demolding device 4 ( Figure 3 and Figure 4 ). In the embodiment shown in Figure 3 and Figure 4 , the lower core box carrying device 2 is removed to expose the lower demolding device 4.
[0043] In an embodiment according to the present disclosure, the lower core box carrying device 2 may include a bottom plate 21. A lower core box (not shown) for manufacturing a core may be arranged on the upper surface of the bottom plate 21. The bottom plate 21 may be positioned above the lower demolding device 4. In the embodiment shown in Figure 3 and Figure 4 , the bottom plate 21 may be positioned above the lower demolding device 4 through a guide rail 3.
[0044] In an embodiment according to the present disclosure, the lower demolding device 4 may include an ejection mechanism. The ejection mechanism may include at least one lower core ejecting rod 41. In the embodiment shown in Figure 3 and Figure 4 , eight lower core ejecting rods 41 are evenly arranged in the space 5 between the guide rails 3. The lower core ejecting rods can be driven to rise from their rest low position ( Figure 3 ) to the ejection high position ( Figure 4 ), and after demolding, return from the ejection high position to the rest low position.
[0045] In order to enable the lower core ejector rod 41 to pass through the bottom plate 21 and extend upward so as to be inserted into the lower core box to demold the core, through holes 22 allowing the lower core ejector rod 41 to pass through can be correspondingly provided in the bottom plate 21. In an embodiment according to the present disclosure, the number and positions of the through holes 22 can at least match the number and positions of the lower core ejector rods 41 installed in the workbench. In Figures 1 to 4 the illustrated embodiment, the number and positions of the eight through holes 22 in the bottom plate 21 match the number and positions of the eight lower core ejector rods 41.
[0046] The size of the through holes 22 in the bottom plate 21 is set such that the lower core ejector rod 41 in the rest low position can pass through the upper end of the through hole 22 and reach the ejection high position, and the lower core ejector rod 41 in the ejection high position can retract from the upper end of the through hole 22 and reach the rest low position, and the lower core ejector rod does not rub or collide with the through hole 22 during movement, thereby avoiding wear. In an Figure 5 embodiment as shown, in the rest low position, the top 41a of the lower core ejector rod can be located within the through hole 22 and not exposed from the upper end of the through hole. The radial spacing existing between the through hole 22 and the lower core ejector rod can prevent the through hole 22 and the lower core ejector rod from contacting, which enables the lower core ejector rod not to be worn due to rubbing or colliding with the through hole during movement.
[0047] To reduce the falling of molding sand through the radial spacing into and accumulating near the lower core ejector rod 41, the workbench can include a sealing member 6 adapted to be installed in the upper end of the through hole 22. In some embodiments according to the present disclosure, the height of the sealing member can be between 42 mm and 46 mm.
[0048] Referring to Figure 5 and Figure 6 , an embodiment of the sealing member conforming to the present disclosure is described.
[0049] The interior of the sealing member 6 can have a through hole 61. The size of the through hole 61 can be set to be as close as possible to the size of the lower core ejector rod 41, so that the lower core ejector rod 41 can pass through the through hole 61 installed in the upper end of the through hole 22, and the molding sand cannot pass through the through hole 61 and fall into the lower demolding device 4. In some embodiments according to the present disclosure, the diameter of the through hole can be between 30 mm and 33 mm.
[0050] In some embodiments, the sealing member 6 may include a main body 62 and a skirt portion 63. The size of the main body 62 is set such that it can be inserted into the upper end of the through hole 22. There may be a radial gap between the through hole 22 and the main body 62. This allows the main body to be applied to through holes 22 of different sizes. In some embodiments according to the present disclosure, the diameter of the main body may be between 36 mm and 40 mm. The main body 62 may be connected to a skirt portion 63 at the lower end. The outer contour of the skirt portion 63 may be set to expand in a direction away from the main body 62 and conform to the size of the through hole 22, so that the skirt portion 63 can be closely attached inside the through hole. This prevents the molding sand that has fallen into the radial gap between the through hole 22 and the main body 62 from falling into the lower demolding device 4 between the skirt portion and the through hole 22. In some embodiments according to the present disclosure, the maximum diameter of the skirt portion may be between 41 mm and 45 mm.
[0051] In other embodiments, the sealing member may further include a head portion 64 provided at the upper end of the main body 62. The size of the head portion 64 may be larger than that of the main body 62, such that the head portion 64 can form a radially extending shoulder 65 relative to the main body 62. The shoulder 65 may at least partially block the radial gap, reducing the molding sand from falling into the radial gap. In other embodiments, the size of the head portion 64 may be larger than or equal to the size of the through hole 22, such that the head portion 64 can be disposed on the outer side surface of the upper end of the through hole 22. The shoulder 65 can completely block the radial gap at this time.
[0052] In other embodiments, the outer surface of the head portion 64 can be used as a guiding surface for guiding the molding sand to slide along the outer surface of the head portion and accumulate on the outer side surface of the upper end of the through hole 22. In one embodiment according to the present disclosure, the outer surface of the head portion may have a cylindrical ( Figure 7 ) or frustum-shaped contour. In another embodiment according to the present disclosure, the outer surface of the head portion may also have an asymmetric shape, such as an oval shape, which can be used to guide the accumulation direction of the molding sand or to block an irregular radial gap. In one embodiment according to the present disclosure, the diameter of the head portion may be between 42 mm and 47 mm, and the height may be between 12 mm and 17 mm.
[0053] In other embodiments, at least one slit 66 may be provided in the skirt portion along its height. When the sealing member 6 is placed into the through hole 22, the outer contour dimension of the skirt portion can be reduced by tightening the slit 66, so that the outer contour of the skirt portion 63 can conform to through holes 22 of different sizes, which helps to increase the versatility of the sealing member 6. In some embodiments, a relatively large-sized slit 66 can be selected, such that the skirt portion 63 has a larger initial size and size change rate and can thus conform to different through holes 22 within a larger size range, which can further increase the versatility of the sealing member 6. The slit 66 may extend linearly or spirally in the skirt portion 63. In some embodiments, multiple slits 66 may be provided in the skirt portion, and the multiple slits 66 may be evenly or unevenly distributed in the skirt portion. In an embodiment according to the present disclosure, four or six slits 66 may be provided in the skirt portion 63. In an embodiment according to the present disclosure, the width of the slit 66 may be between 2 mm and 4 mm. The length of the slit may be between 14 mm and 18 mm.
[0054] The sealing member is made of nylon, making the sealing member wear-resistant, corrosion-resistant, high-temperature resistant, deformation-resistant, and having a long service life, which not only plays a sealing role but also avoids the collision and wear between the lower core rod and the through hole.
[0055] Although the present disclosure has been disclosed above with preferred embodiments, it is not intended to limit the present disclosure. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present disclosure by using the methods and technical contents disclosed above without departing from the spirit and scope of the present disclosure. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present disclosure without departing from the technical solutions of the present disclosure all fall within the protection scope of the technical solutions of the present disclosure.
Claims
1. A sealing member, characterized in that: The sealing member is used in a sand core manufacturing device for manufacturing sand cores using molding sand, the sand core manufacturing device at least comprising a lower demoulding device and a lower core box bearing device, the lower demoulding device at least comprising an ejection mechanism, the lower core box bearing device having at least one through hole, the size of the at least one through hole being set to allow the ejection mechanism to move between a resting low position and an ejection high position through the at least one through hole, The sealing member comprises a main body and a skirt connected to the lower end of the main body, the outer contour of the skirt is configured to expand in a direction away from the main body, so that when the sealing member is installed in a corresponding through hole of the at least one through hole, the skirt can fit tightly in the corresponding through hole to prevent the molding sand from falling into the lower demolding device, and the interior of the sealing member has a through hole, the size of the through hole is configured to fit the size of the ejection mechanism, so that when the sealing member is installed in a corresponding through hole of the at least one through hole, the ejection mechanism can pass through the through hole and the molding sand cannot fall into the lower demolding device through the through hole.
2. The sealing member according to claim 1, characterized in that The sealing member further comprises a head portion disposed at an upper end portion of the main body, wherein a size of the head portion is larger than a size of the main body so that the head portion forms a radially extending shoulder relative to the main body.
3. The sealing member according to claim 2, characterized in that The size of the head portion is greater than or equal to the size of the at least one through hole, so that the head portion is arranged on the outer side surface of the upper end of the at least one through hole.
4. The sealing member according to claim 3, characterized in that The outer surface of the head portion serves as a guide surface to guide the molding sand to slide down along the outer surface of the head portion and accumulate on the outer side surface of the upper end of the at least one through hole.
5. The sealing member according to claim 4, characterized in that The outer surface of the head has a cylindrical or truncated cone-shaped profile.
6. The sealing member according to claim 1, characterized in that The sealing member height is between 42 mm and 46 mm, the body diameter is between 36 mm and 40 mm, and the maximum diameter of the skirt is between 41 mm and 45 mm.
7. The sealing member according to claim 1, characterized in that When the sealing member is installed in a corresponding through hole of the at least one through hole, a radial gap exists between the main body and the corresponding through hole, and the skirt fits tightly in the corresponding through hole to prevent the molding sand entering the radial gap from falling into the lower demolding device.
8. The sealing member according to claim 1, characterized in that The outer contour size of the skirt is larger than the size of the at least one through hole, and when the sealing member is installed in a corresponding through hole of the at least one through hole, the outer contour size of the skirt becomes smaller so that the skirt fits tightly in the corresponding through hole.
9. The sealing member according to claim 2, characterized in that: The diameter of the head is between 42 mm and 47 mm, and the height is between 12 mm and 17 mm.
10. The sealing member according to claim 1, characterized in that At least one slit is arranged in the skirt, and the slit can be tightened to reduce the outer contour size of the skirt.
11. The sealing member according to claim 10, characterized in that The slots extend linearly or helically in the skirt.
12. The sealing member according to claim 10, characterized in that The skirt is provided with a plurality of slits, and the plurality of slits are evenly or unevenly distributed in the skirt.
13. The sealing member according to claim 10, characterized in that The width of the gap is between 2 mm and 4 mm, and the height of the gap is between 14 mm and 18 mm.
14. A sealing member, characterized in that: The sealing member is used in a sand core manufacturing device for manufacturing sand cores using molding sand, the sand core manufacturing device at least comprising a lower demoulding device and a lower core box bearing device, the lower demoulding device at least comprising an ejection mechanism, the lower core box bearing device having at least one through hole, the size of the at least one through hole being set to allow the ejection mechanism to move between a resting low position and an ejection high position through the at least one through hole, Wherein, the sealing member includes a main body and a head arranged at the upper end of the main body, the size of the head is larger than the size of the main body, so that the head forms a radially extending boss relative to the main body, and the interior of the sealing member has a through hole, and the size of the through hole is set to fit the size of the ejection mechanism, so that when the sealing member is installed in the corresponding through hole of the at least one through hole, the ejection mechanism can pass through the through hole and the molding sand cannot fall into the lower demolding device through the through hole.
15. The sealing member according to claim 14, characterized in that The sealing member also includes a skirt connected to the lower end of the main body, and the outer contour of the skirt is configured to expand in a direction away from the main body, so that when the sealing member is installed in a corresponding through hole in the at least one through hole, the skirt can fit tightly in the corresponding through hole to prevent the molding sand from falling into the lower demolding device.