Filtering structure for casting and pouring gate assembly

Abstract

The utility model provides a filter structure for casting and a sprue component, which comprises a filter cartridge and a sprue spreader, the filter cartridge is provided with a diversion channel along the axial direction, and the side wall of the filter cartridge is provided with a plurality of filter holes; the diameter of the sprue spreader is gradually reduced from top to bottom, and the sprue spreader is inserted into the filter cartridge and abuts against the top of the filter cartridge. The utility model provides a filtering structure for casting and a pouring gate assembly, and aims to solve the problems that in the prior art, the contact area between a filter screen arranged on a pouring gate cup and molten metal is small, so that the filtering efficiency is low, and the molten metal is easy to penetrate through the filter screen and uprush.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting, and more specifically relates to a filtering structure and a pouring gate component for casting. Background Art

[0002] In the metal casting process, the molten metal rises from the bottom to the top through the riser under a certain pressure. Before the molten metal enters the mold cavity, it needs to pass through the sprue bushing connected to the gate in the mold. The molten metal through the sprue bushing enters the mold cavity smoothly and fills the mold cavity. The sprue bushing has the function of drainage and heat preservation on the one hand, and prevents the molten metal from scouring the mold on the other hand.

[0003] For metals with unstable properties, such as aluminum, it is easy to react chemically with oxygen, nitrogen, sulfur, carbon and other elements to form compounds during the casting process. In addition, other inclusions are often mixed in the aluminum liquid, causing defects such as looseness, pores, and inclusions in the casting, which significantly reduces the mechanical properties, processing properties, fatigue resistance and corrosion resistance of the casting after molding. In order to improve this phenomenon, during the casting process, a filter is generally configured in the channel of the pouring cup, and the filter is used to filter and purify the molten metal to remove bubbles, oxides and other inclusions in the molten metal, thereby reducing the pores, slag inclusions, etc. of the casting and improving the quality of the finished casting.

[0004] The existing filter screen is usually a planar structure. For example, the patent document with the publication number CN204486714U discloses a pouring cup with a filter device for lost foam casting, which states that "the filter screen is fixedly arranged between the pouring cup and the pouring cup seat, and the filter screen is fixedly connected to the pouring cup through an adhesive." Figure 1 It can be seen that the filter is a flat structure. Obviously, the contact area between the flat filter and the molten metal is limited, and the filtration efficiency per unit time is low, which cannot meet the high efficiency requirements of modern production. In addition, during the casting process, the molten metal can easily pass through the filter and wash the upper mold upward, affecting the quality of the casting. Utility Model Content

[0005] The utility model aims to provide a filtering structure and a pouring nozzle assembly for casting, aiming to solve the problem in the prior art that the contact area between the filter screen arranged on the pouring nozzle cup and the molten metal is small, resulting in low filtering efficiency and the molten metal easily flows through the filter screen.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] In a first aspect, a casting filter structure is provided, comprising:

[0008] A filter cartridge is provided with a flow guide channel in the axial direction, and a side wall of the filter cartridge is provided with a plurality of filter holes; and

[0009] The diameter of the diverter cone gradually decreases from top to bottom. The diverter cone is inserted into the filter cartridge and abuts against the top of the filter cartridge.

[0010] In combination with the first aspect, in a possible implementation manner, the splitter cone includes:

[0011] A cone is inserted into the filter cartridge; and

[0012] The flange is arranged around the outer edge of the cone, and the flange is placed on the top of the filter cartridge.

[0013] The beneficial effect of the casting filter structure provided by the utility model is that compared with the prior art, the diverter cone of the casting filter structure of the utility model is inserted into the filter barrel during casting and abuts against the top of the filter barrel, thereby fixing the filter barrel. The molten metal enters the filter barrel from the bottom. Since the diverter cone seals the top of the filter barrel, the molten metal cannot flow out from the top of the filter barrel after entering the filter barrel, thereby preventing the molten metal from passing through the filter barrel and washing the upper mold upward. In addition, the molten metal in the filter barrel flows radially under the action of the diverter cone, thereby flowing into the mold cavity through the side wall of the filter net. The entire side wall of the filter barrel in the utility model is a filtering surface, which increases the filtering area compared to the flat-plate filtering structure in the prior art, improves the filtering effect of the molten metal, ensures the casting efficiency, and can also prevent the molten metal from surging upward and washing the upper mold.

[0014] In a second aspect, an embodiment of the utility model further provides a gate assembly, comprising any one of the above-mentioned filtering structures for casting, and further comprising a gate sleeve and a gate cup sequentially arranged below the filter cylinder.

[0015] In conjunction with the second aspect, in a possible implementation, the sprue bushing includes:

[0016] A guide tube, wherein a supporting boss is provided in the guide tube, the filter tube is inserted in the guide tube and abuts against the supporting boss, and the lower part of the guide tube is inserted in the pouring cup; and

[0017] A limiting ring is sleeved outside the guide tube, and the limiting ring is built on the top of the pouring cup.

[0018] In combination with the second aspect, in a possible implementation, the gate sleeve includes a connecting portion and a guiding portion distributed from top to bottom, and the inner diameter of the connecting portion is larger than the inner diameter of the guiding portion, so that the top end of the guiding portion forms the supporting boss.

[0019] In combination with the second aspect, in a possible implementation, the inner diameter of the connecting portion gradually decreases from top to bottom, the inner diameter of the guiding portion is consistent from top to bottom, and the minimum inner diameter of the connecting portion is greater than the inner diameter of the guiding portion.

[0020] In combination with the second aspect, in a possible implementation, a mounting step is provided in the pouring cup, and the mounting step provides support force for the pouring sleeve.

[0021] In combination with the second aspect, in a possible implementation, the pouring cup has a casting channel arranged along the axis, the casting channel includes a mounting portion and a guide portion distributed from top to bottom, the pouring sleeve is inserted in the mounting portion, and the top of the guide portion forms the mounting step.

[0022] In combination with the second aspect, in a possible implementation, the mounting portion includes a guide zone, a gate zone, a transition zone and a drainage zone, which are distributed in sequence from top to bottom and whose inner diameters gradually increase, wherein the guide zone is a conical channel whose diameter gradually increases from top to bottom, and the minimum diameter of the guide zone is consistent with the diameter of the bottom of the gate sleeve.

[0023] In combination with the second aspect, in a possible implementation, the gate assembly also includes an upper mold connected to the top of the diverter cone.

[0024] The beneficial effect of the gate assembly provided by the utility model is that: compared with the prior art, the gate assembly of the utility model adopts the above-mentioned casting filter structure, and has similar technical effects to the above-mentioned casting filter structure, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a gate assembly provided in an embodiment of the utility model;

[0027] Figure 2 A cross-sectional view of a gate assembly provided in an embodiment of the utility model;

[0028] Figure 3 A cross-sectional view of an upper die and a diverter cone used in another embodiment of the utility model;

[0029] Figure 4 This is a cross-sectional view of the filter cartridge, sprue sleeve and sprue cup used in the embodiment of the utility model.

[0030] In the figure: 1. filter cartridge; 2. diverter cone; 201. flange; 202. cone; 3. gate sleeve; 301. guide cartridge; 302. limit ring; 303. connection portion; 304. guide portion; 305. support boss; 4. gate cup; 401. mounting portion; 402. guide portion; 4021. guide area; 4022. gate area; 4023. transition area; 4024. drainage area; 403. installation step; 5. upper mold. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] In the claims, specification and the above drawings of the present utility model, unless otherwise clearly defined, the terms "first", "second" or "third" are used to distinguish different objects, rather than to describe a specific order. Unless otherwise specified, other directional words, such as "vertical", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, so it cannot be understood as limiting the specific protection scope of the present utility model. In the claims, specification and the above drawings of the present utility model, unless otherwise clearly defined, the terms "fixed connection" or "fixed connection" should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements. In the claims, specification and the above drawings of the present utility model, the terms "including", "having" and their variations are used, and the intention is to "include but not limited to".

[0033] Please also read Figure 1 and Figure 2 The present invention provides a casting filter structure and a pouring gate assembly. The casting filter structure includes a filter cartridge 1 and a diverter cone 2. The filter cartridge 1 is provided with a flow guide channel along the axial direction, and a plurality of filter holes are provided on the side wall of the filter cartridge 1. The diverter cone 2 has a diameter that gradually decreases from top to bottom. The diverter cone 2 is inserted into the filter cartridge 1 and abuts against the top of the filter cartridge 1.

[0034] Compared with the prior art, the casting filter structure provided by the utility model has a diverter cone 2 inserted into the filter barrel 1 during casting and abutted against the top of the filter barrel 1, thereby fixing the filter barrel 1. The molten metal enters the filter barrel 1 from the bottom. Since the diverter cone 2 seals the top of the filter barrel 1, the molten metal cannot flow out from the top of the filter barrel 1 after entering the filter barrel 1, thereby preventing the molten metal from passing through the filter barrel 1 and washing the upper mold 5 upward. In addition, the molten metal in the filter barrel 1 flows radially under the action of the diverter cone 2, thereby flowing into the mold cavity through the side wall of the filter net. The entire side wall of the filter barrel 1 in the utility model is a filtering surface, which increases the filtering area compared to the flat-plate filtering structure in the prior art, improves the filtering effect of the molten metal, ensures the casting efficiency, and can also prevent the molten metal from surging upward and washing the upper mold 5.

[0035] It should be noted that some companies also use a roll-type simple fiber mesh as a filter mesh, but the fiber mesh has a large pore size and a poor filtering effect. The filter cartridge 1 in the present application is made of alloy materials, such as Al-Ti alloy, Ti-Ni alloy, Fe-Ti alloy, Fe-Ni alloy, etc., which can effectively reduce the pore size of the filter hole and ensure the filtering effect. In addition, the alloy component is stronger than the fiber component, which increases the service life and avoids the probability of deformation of the filter cartridge 1 during use.

[0036] In some embodiments, see Figure 3 The diverter cone 2 includes a cone 202 and a flange 201 . The cone 202 is inserted into the filter cartridge 1 . The flange 201 is arranged around the outer edge of the cone 202 , and the flange 201 is placed on the top of the filter cartridge 1 .

[0037] A flange 201 is provided on the outer side of the cone 202, and the flange 201 overlaps the top of the filter cartridge 1, thereby fixing the filter cartridge 1. Compared with the solution in which the outer edge of the cone 202 contacts the top of the filter cartridge 1, the solution in this embodiment increases the contact area with the filter cartridge 1, so that the filter cartridge 1 is tightly fixed by the flange 201 after the mold is closed, thereby improving the stability of the filter cartridge 1 during the casting process.

[0038] Based on the same inventive concept, the utility model also provides a gate assembly. Figures 1 to 4 The gate assembly includes any one of the above-mentioned casting filtering structures, and also includes a gate sleeve 3 and a gate cup 4 sequentially arranged below the filter cylinder 1.

[0039] The gate assembly provided by the utility model adopts the above-mentioned filtering structure for casting. During casting, the diverter cone 2 is inserted into the filter barrel 1 and abuts against the top of the filter barrel 1, thereby fixing the filter barrel 1. The molten metal enters from the bottom of the pouring cup 4, and then enters the filter barrel 1 from the bottom along the gate sleeve 3. Since the diverter cone 2 seals the top of the filter barrel 1, the molten metal cannot flow out from the top of the filter barrel 1 after entering the filter barrel 1, thereby preventing the molten metal from passing through the filter barrel 1 to flush the upper mold 5 upward. In addition, the molten metal in the filter barrel 1 flows radially under the action of the diverter cone 2, thereby flowing into the mold cavity through the side wall of the filter screen. The entire side wall of the filter barrel 1 in the utility model is a filtering surface, which increases the filtering area compared to the flat filtering structure in the prior art, improves the filtering effect of the molten metal, ensures the casting efficiency, and can also prevent the molten metal from surging upward to flush the upper mold 5.

[0040] In some embodiments, see Figure 4 The gate sleeve 3 includes a guide tube 301 and a limiting ring 302. A supporting boss 305 is provided in the guide tube 301. The filter tube 1 is inserted in the guide tube 301 and abuts against the supporting boss 305. The lower part of the guide tube 301 is inserted in the gate cup 4; the limiting ring 302 is sleeved outside the guide tube 301, and the limiting ring 302 is placed on the top of the gate cup 4.

[0041] The filter cartridge 1, the sprue sleeve 3 and the sprue cup 4 are connected by plugging in sequence, which increases the sealing of the connection and prevents the metal liquid from leaking out during the flow. The support boss 305 provides support force for the filter cartridge 1, and the diverter cone 2 and the support boss 305 cooperate to limit the filter cartridge 1 in the up and down directions, thereby preventing the filter cartridge 1 from being displaced under the impact of the metal liquid and ensuring the stability of the filter cartridge 1. The limiting ring 302 is set on the top of the sprue cup 4, and the filter cartridge 1 abuts against the support boss 305, thereby limiting the sprue sleeve 3 in the up and down directions. This embodiment can achieve the limitation of the filter cartridge 1 and the sprue sleeve 3 without the use of external connectors, simplifies the connection structure, and avoids the problem of connection failure caused by loose external connectors.

[0042] It should be noted that since the molten metal enters from the bottom of the pouring cup 4, an upward impact force is formed on the pouring cup 4, and the top of the pouring cup 4 abuts against the limiting ring 302, so that the pouring cup 4 is stable in the up and down directions and will not be displaced.

[0043] In some embodiments, see Figure 4 The sprue bushing 3 includes a connecting portion 303 and a guiding portion 304 which are distributed from top to bottom. The inner diameter of the connecting portion 303 is larger than the inner diameter of the guiding portion 304 , so that a supporting boss 305 is formed at the top of the guiding portion 304 .

[0044] The supporting boss 305 is formed by the inner diameter difference between the connecting portion 303 and the guiding portion 304 , and no additional supporting structure is required, thus simplifying the processing technology. Meanwhile, the integrated structure also improves the strength of the sprue bushing 3 .

[0045] In some embodiments, see Figure 1 The inner diameter of the connecting portion 303 decreases gradually from top to bottom, the inner diameter of the guiding portion 304 is consistent from top to bottom, and the minimum inner diameter of the connecting portion 303 is greater than the inner diameter of the guiding portion 304 .

[0046] The inner diameter of the connecting portion 303 gradually decreases from top to bottom, so that the inner diameter of the top of the connecting portion 303 is larger, which facilitates the insertion of the filter cartridge 1 into the connecting portion 303 and improves the installation efficiency.

[0047] In some embodiments, see Figure 4 A mounting step 403 is provided in the pouring cup 4 , and the mounting step 403 provides support force for the pouring sleeve 3 .

[0048] The lower part of the sprue sleeve 3 is inserted into the sprue cup 4 and abuts against the mounting step 403. The mounting step 403 and the top of the sprue cup 4 jointly provide support for the sprue sleeve 3, thereby increasing the contact area with the sprue sleeve 3 and further increasing the stability of the connection.

[0049] In some embodiments, see Figure 4 The pouring cup 4 has a casting channel arranged along the axis, and the casting channel includes a mounting portion 401 and a guide portion 402 distributed from top to bottom. The pouring sleeve 3 is inserted into the mounting portion 401, and a mounting step 403 is formed at the top of the guide portion 402.

[0050] The mounting step 403 is formed by the inner diameter difference between the mounting portion 401 and the guide portion 402 , and no additional supporting structure is required, which simplifies the processing technology. Meanwhile, the integrated design improves the strength of the pouring cup 4 .

[0051] Specifically, the inner diameter of the mounting portion 401 is greater than the inner diameter of the top end of the guide portion 402 .

[0052] In some embodiments, see Figure 4 The mounting portion 401 includes a guide area 4021, a gate area 4022, a transition area 4023 and a drainage area 4024, which are distributed in sequence from top to bottom and whose diameters gradually increase. Among them, the guide area 4021 is a conical channel whose diameter gradually increases from top to bottom, and the minimum diameter of the guide area 4021 is consistent with the diameter of the bottom of the gate sleeve 3.

[0053] Since the molten metal enters the casting channel from the drainage area 4024, the diameter of the drainage area 4024 is set to be the largest, which is conducive to guiding the molten metal into the drainage area 4024. As the molten metal flows upward and enters the transition area 4023, the gradually reduced diameter pours the molten metal into the gate area 4022, where the molten metal achieves stable flow, and then enters the guide area 4021 and flows into the gate bushing 3. While guiding the liquid into the gate bushing 3, this embodiment achieves stable flow of the molten metal by gradually reducing the diameter, thereby avoiding turbulence of the molten metal caused by the sudden drop in diameter.

[0054] Specifically, the transition zone 4023 is a conical channel whose diameter gradually increases from top to bottom, and the top diameter of the transition zone 4023 is consistent with the gate zone 4022 , and the bottom diameter is consistent with the drainage zone 4024 .

[0055] In some embodiments, see Figure 1 The gate assembly also includes an upper mold 5 connected to the top of the diverter cone 2.

[0056] The diverter cone 2 is connected to the upper mold 5, and the upper mold 5 is moved downward to achieve the abutment between the diverter cone 2 and the filter cartridge 1, thereby avoiding the possibility of the diverter cone 2 being misplaced due to the downward movement of the upper mold 5.

[0057] Optionally, the splitter cone 2 and the upper die 5 are an integral component or a separate component. The upper die 5 is provided with a through mounting hole, and the splitter cone is screwed to the mounting hole. The splitter cone 2 can also be welded or bonded to the upper die 5.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A filter structure for casting, characterized in that: include: The filter cartridge has a flow guide channel opened in the axial direction, and a plurality of filter holes opened in the side wall of the filter cartridge; as well as The diameter of the diverter cone gradually decreases from top to bottom. The diverter cone is inserted into the filter cartridge and abuts against the top of the filter cartridge.

2. The casting filter structure according to claim 1, characterized in that: The splitter cone comprises: A cone is inserted into the filter cartridge; and The flange is arranged around the outer edge of the cone, and the flange is placed on the top of the filter cartridge.

3. A gate assembly, characterized in that: The casting filtering structure according to any one of claims 1 to 2 further comprises a sprue sleeve and a sprue cup sequentially arranged below the filter cylinder.

4. The gate assembly according to claim 3, characterized in that: The sprue bushing comprises: A guide tube, wherein a supporting boss is provided in the guide tube, the filter tube is inserted in the guide tube and abuts against the supporting boss, and the lower part of the guide tube is inserted in the pouring cup; and A limiting ring is sleeved outside the guide tube, and the limiting ring is built on the top of the pouring cup.

5. The gate assembly according to claim 4, characterized in that: The sprue bushing includes a connecting portion and a guiding portion distributed from top to bottom, and the inner diameter of the connecting portion is larger than the inner diameter of the guiding portion, so that the top end of the guiding portion forms the supporting boss.

6. The gate assembly according to claim 5, characterized in that: The inner diameter of the connecting portion decreases gradually from top to bottom, the inner diameter of the guiding portion is consistent from top to bottom, and the minimum inner diameter of the connecting portion is greater than the inner diameter of the guiding portion.

7. The gate assembly according to claim 3, characterized in that: An installation step is arranged in the pouring cup, and the installation step provides support force for the pouring sleeve.

8. The gate assembly according to claim 7, characterized in that: The pouring cup has a casting channel arranged along the axis, and the casting channel includes a mounting portion and a guide portion distributed from top to bottom. The pouring sleeve is inserted into the mounting portion, and the top end of the guide portion forms the mounting step.

9. The gate assembly according to claim 8, characterized in that: The mounting portion includes a guide area, a gate area, a transition area and a drainage area which are distributed in sequence from top to bottom and whose inner diameters gradually increase, wherein the guide area is a conical channel whose diameter gradually increases from top to bottom, and the minimum diameter of the guide area is consistent with the diameter of the bottom of the gate sleeve.

10. The gate assembly according to claim 3, characterized in that: The gate assembly also includes an upper mold connected to the top of the diverter cone.

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