Exhaust type ejector rod

Abstract

The utility model discloses an exhaust type ejector rod, which relates to the technical field of casting moulds and comprises an ejector rod and a mould, a rod hole is arranged on the inner side of the bottom of the mould, a sand core is arranged on the inner side of the top of the mould, and a boring ventilation component and a fixing component are arranged between the ejector rod and the rod hole. The boring ventilation assembly comprises a plane, a plurality of scraping blocks and air holes, the plane is formed in the outer wall of one end of the ejector rod, the scraping blocks are fixedly installed on one side of the plane, and the air holes are formed in the middles of the scraping blocks; according to the technical scheme provided by the utility model, the boring ventilation assembly is arranged, specifically, when the ejector rod works, the scraping block is used for filling the vacant position of the plane formed by the ejector rod, so that the section of the scraping block is matched with the rod hole, the rod hole is scraped, and meanwhile, the air hole is used for ventilation, so that normal ventilation is ensured, and meanwhile, the service life of the ejector rod is prolonged. Tar is prevented from being attached to the inner wall of the rod hole.

Description

Technical Field

[0001] The utility model relates to the technical field of casting molds, in particular to an exhaust type ejector rod. Background Art

[0002] In metal casting molds, it is common to make sand cores. However, during the casting process of the sand core, gases are generated, which is called "gassing" by industry insiders. In order to ensure the quality of the casting, these gases must be discharged. At present, it is common practice to set a vent plug on the surface of the sand core to discharge the gas of the sand core through the vent plug. However, the gassing of the sand core also produces tar, which may clog the vent plug, resulting in poor venting or loss of venting function. This may cause the casting to be damaged and become scrap, resulting in economic losses.

[0003] Chinese patent document CN201988679U discloses an exhaust type ejector rod, comprising an ejector rod and an ejector rod hole, wherein the ejector rod is connected to an ejector plate, the ejector rod hole is arranged on a mold, the cross section of the upper section of the ejector rod is arranged as a triangular surface, the ejector rod having a triangular surface cross section passes through the ejector rod hole, and the upper end surface of the triangular surface ejector rod contacts the sand core surface. Although such an arrangement can be used for exhaust, the ejector rod is not convenient to remove. After long-term use, tar will gradually accumulate on the inner wall of the ejector rod hole. As the tar increases, the exhaust is likely to be blocked, so improvement is needed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide an exhaust type ejector rod, so as to solve the problem that although the prior art can be used for exhaust, the ejector rod is inconvenient to remove, and after long-term use, tar will gradually accumulate on the inner wall of the ejector rod hole. As the tar increases, the exhaust is likely to be blocked.

[0005] In view of this, the utility model provides an exhaust type ejector, comprising an ejector and a mold, wherein a rod hole is opened on the inner side of the bottom of the mold, a sand core is opened on the inner side of the top, and a boring and ventilating component and a fixing component are arranged between the ejector and the rod hole;

[0006] The boring and venting assembly comprises a plane, a plurality of scraping blocks and air holes. The plane is arranged on the outer wall of one end of the push rod, a plurality of scraping blocks are fixedly installed on one side of the plane, and the air holes are arranged in the middle of the scraping blocks.

[0007] Optionally, the planes are arranged in a circular array around the top rod.

[0008] Optionally, a plurality of the scraping blocks are arranged in a linear array on one side of the plane.

[0009] Optionally, one end of the air hole passes through the top of the scraping block, and the other end of the air hole passes through the bottom of the scraping block.

[0010] Optionally, the push rod is slidably connected to the inner side of the rod hole, and the arc diameter of the push rod matches the inner diameter of the rod hole.

[0011] Optionally, the fixing assembly includes a fixing groove, a fixing block, a stopper and a fixing bolt, the fixing groove is opened on one side of the plane, the fixing block is fixedly connected to one side of several scraping blocks, and the stopper is fixedly installed on one end of the push rod by setting a fixing bolt.

[0012] Optionally, the fixing groove matches the fixing block, and the stop block is disposed at one end of the connection between the fixing groove and the fixing block.

[0013] It can be seen from the above technical solutions that the embodiments of the utility model have the following advantages:

[0014] 1. The utility model discloses an exhaust type ejector rod, which is provided with a boring and ventilating component. Specifically, when the ejector rod is working, a scraping block is used to fill the vacant position of the plane opened by the ejector rod, so that its cross section fits with the rod hole, the rod hole is scraped and ground, and ventilation is performed through the air hole at the same time, thereby ensuring normal ventilation while preventing tar from adhering to the inner wall of the rod hole.

[0015] 2. The utility model provides an exhaust type ejector rod, by setting a fixing component, specifically, by using the cooperation of a fixing groove and a fixing block, and by using a stopper and a fixing bolt to connect with the ejector rod, limiting the connection between the fixing groove and the fixing block, fixing the scraping block on the outside of the ejector rod, unscrewing the fixing bolt to remove the stopper, and the scraping block can be disassembled and cleaned without removing the ejector rod, thereby facilitating use.

[0016] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a partial sectional view of the side of the utility model;

[0020] Figure 3 It is an exploded view of the local structure of the utility model;

[0021] Figure 4 It is a partial top view of the utility model.

[0022] Explanation of the reference numerals: 1. ejector pin; 2. mold; 3. rod hole; 4. sand core; 501. plane; 502. scraping block; 503. air hole; 601. fixing groove; 602. fixing block; 603. stopper; 604. fixing bolt. DETAILED DESCRIPTION

[0023] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0024] An exhaust ejector rod according to an embodiment of the utility model will be described in detail below with reference to the accompanying drawings.

[0025] Example 1

[0026] For easier understanding, see Figures 1 to 4 The utility model provides an embodiment of an exhaust type ejector, comprising an ejector 1 and a mold 2, wherein a rod hole 3 is provided on the inner side of the bottom of the mold 2, a sand core 4 is provided on the inner side of the top of the mold 2, and a boring and ventilating component and a fixing component are provided between the ejector 1 and the rod hole 3;

[0027] The boring ventilation component includes a plane 501, a plurality of scraping blocks 502 and an air hole 503. The plane 501 is opened on the outer wall of one end of the push rod 1, and the plurality of scraping blocks 502 are fixedly installed on one side of the plane 501. The air hole 503 is opened in the middle of the scraping block 502. The plane 501 is arranged in a circular array around the push rod 1, and the plurality of scraping blocks 502 are arranged in a linear array on one side of the plane 501. One end of the air hole 503 passes through the top of the scraping block 502, and the other end of the air hole 503 passes through the bottom of the scraping block 502. The push rod 1 is slidably connected to the inner side of the rod hole 3, and the arc diameter of the push rod 1 matches the inner diameter of the rod hole 3.

[0028] It should be noted that, by providing the plane 501, the scraping block 502 and the air hole 503, and by opening the plane 501 around the push rod 1, a gap is left between the push rod 1 and the rod hole 3 for exhaust, and then by providing the scraping block 502 and the air hole 503, when the push rod 1 is working, the scraping block 502 is used to fill the vacant position of the plane 501 opened by the push rod 1, so that the outer side of the entire cross-section fits with the inner wall of the rod hole 3, and the rod hole 3 is scraped and ventilated at the same time, thereby ensuring normal ventilation while preventing tar from adhering to the inner wall of the rod hole 3.

[0029] Example 2

[0030] In some embodiments, Figure 3As shown, the fixing assembly includes a fixing groove 601, a fixing block 602, a stopper 603 and a fixing bolt 604. The fixing groove 601 is opened on one side of the plane 501. The fixing block 602 is fixedly connected to one side of a plurality of scraping blocks 502. The stopper 603 is fixedly installed on one end of the push rod 1 by means of the setting of the fixing bolt 604. The fixing groove 601 matches the fixing block 602. The stopper 603 is arranged against one end of the connection between the fixing groove 601 and the fixing block 602.

[0031] It should be noted that, by providing a fixing groove 601 and a fixing block 602, utilizing the cooperation of the fixing groove 601 and the fixing block 602, and utilizing the provided stop block 603 and the fixing bolt 604 to connect with the push rod 1, the connection between the fixing groove 601 and the fixing block 602 is limited, the scraping block 502 can be fixed on the outside of the plane 501, the scraping block 502 is fixed on the outside of the push rod 1, the fixing bolt 604 is unscrewed to remove the stop block 603, and the scraping block 502 can be disassembled and cleaned without removing the push rod 1, thereby facilitating use.

[0032] Working principle: When in use, the fixing groove 601 and the fixing block 602 are matched, and the set stopper 603 and the fixing bolt 604 are used to connect with the push rod 1, and the connection between the fixing groove 601 and the fixing block 602 is limited, and the scraping block 502 can be fixed on the outside of the plane 501. During use, when the push rod 1 is working, the scraping block 502 is used to fill the vacant position of the plane 501 opened by the push rod 1, so that the outer side of the entire cross-section fits with the inner wall of the rod hole 3, and the rod hole 3 is scraped and ground. At the same time, the air hole 503 is used for ventilation, so as to ensure normal ventilation while preventing tar from adhering to the inner wall of the rod hole 3. After using it for a period of time, the fixing bolt 604 can be unscrewed to remove the stopper 603, and the scraping block 502 can be disassembled and cleaned without removing the push rod 1, which is convenient to use.

[0033] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An exhaust type ejector, characterized in that: It comprises a push rod (1) and a mold (2), wherein a rod hole (3) is provided on the inner side of the bottom of the mold (2), a sand core (4) is provided on the inner side of the top of the mold (2), and a boring and ventilating component and a fixing component are provided between the push rod (1) and the rod hole (3); The boring and ventilating assembly comprises a plane (501), a plurality of scraping blocks (502) and an air hole (503); the plane (501) is provided on the outer wall of one end of the push rod (1); the plurality of scraping blocks (502) are fixedly mounted on one side of the plane (501); and the air hole (503) is provided in the middle of the scraping block (502).

2. The exhaust ejector according to claim 1, characterized in that: The planes (501) are arranged in a circular array around the top rod (1).

3. The exhaust type ejector according to claim 1, characterized in that: The plurality of scraping blocks (502) are arranged in a linear array on one side of the plane (501).

4. The exhaust type ejector according to claim 1, characterized in that: One end of the air hole (503) passes through the top of the scraping block (502), and the other end of the air hole (503) passes through the bottom of the scraping block (502).

5. The exhaust type ejector according to claim 1, characterized in that: The push rod (1) is slidably connected to the inner side of the rod hole (3), and the arc diameter of the push rod (1) matches the inner diameter of the rod hole (3).

6. The exhaust type ejector according to claim 1, characterized in that: The fixing assembly comprises a fixing groove (601), a fixing block (602), a stopper (603) and a fixing bolt (604); the fixing groove (601) is provided on one side of the plane (501); the fixing block (602) is fixedly connected to one side of a plurality of scraping blocks (502); and the stopper (603) is fixedly mounted on one end of the push rod (1) by means of the fixing bolt (604).

7. The exhaust type ejector according to claim 6, characterized in that: The fixing groove (601) matches the fixing block (602), and the stop block (603) is disposed against one end of the connection between the fixing groove (601) and the fixing block (602).

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