Large oil pan pouring device

Abstract

The utility model relates to the technical field of pouring, in particular to a large oil pan pouring device which comprises a pouring cup, the lower side of the pouring cup is fixedly connected with a straight pouring gate which is arranged in a communicated mode, and the two sides of the lower portion of the straight pouring gate are fixedly connected with transverse pouring gates which are arranged in a communicated mode. According to the pouring device for the large oil pan, through the arrangement of the structures such as the pouring cup, the straight pouring channel, the transverse pouring channel, the fiber filter screen, the dead head, the lock frame and the lock head, when the pouring device for the large oil pan is used for pouring, molten iron can finish rapid mold filling in the shortest path vertically downwards from the top; according to the method, the temperature gradient of the cavity is uniform, the solidification sequence is controlled, and oxidizing slag, vulcanized slag and non-metallic inclusions in molten iron are continuously and efficiently removed through a three-stage slag stopping mechanism, so that the high-quality oil pan without cold shut, slag inclusion and shrinkage porosity is obtained, and a worker can conveniently maintain a riser subsequently.

Description

Technical Field

[0001] This utility model relates to the field of casting technology, specifically a large oil pan casting device. Background Technology

[0002] The large oil pan is the outer shell of the oil reservoir at the bottom of the engine crankcase, usually located at the bottom of the engine block. It is used to collect and temporarily store the oil flowing back from various lubrication points, and at the same time plays the roles of sealing, heat dissipation and sedimentation of impurities. The casting device refers to a complete channel system that safely, efficiently and cleanly introduces molten metal from the furnace into the mold cavity.

[0003] In existing technologies, casting devices for large oil pans are generally categorized into two typical structures: the first adopts a "downward-facing opening" layout, such as... Figure 7 As shown in Case 1, placing the complete casting device on the side of the part allows molten iron to directly impact the sidewall and enter the cavity horizontally. The high-speed metal flow not only causes severe erosion of the sand core and mold but also generates intense splashing and secondary oxidation. Ultimately, the surface and internal structure of the casting becomes loose, its density significantly reduced, and the risk of leakage is extremely high. The second method uses an "opening upwards" layout, such as... Figure 8 As shown in Case 2, although the riser is placed on top of the part, the entire casting device is still arranged on the side. Molten iron must first flow horizontally into the riser through the ingate and then turn downwards into the mold cavity. The process is tortuous, the flow rate is limited, the filling is slow and the temperature loss is large. The slag blocking ability is weak, and defects such as cold shut, insufficient pouring and slag inclusion frequently occur. Moreover, it is inconvenient to clean the inside of the riser later. Therefore, based on the above problems, a large oil pan casting device is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a large oil pan casting device to solve the problems of erosion, splashing, cold shut, slag inclusion, shrinkage porosity and difficult riser cleaning in traditional side-injection casting devices.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A large oil pan casting device includes a pouring cup. A sprue is fixedly connected to the lower side of the pouring cup. A transverse sprue is fixedly connected to both sides of the lower part of the sprue. A plurality of outlets are equidistantly arranged on the lower side of the transverse sprue. Lock heads are fixedly connected to the lower end face of the transverse sprue on both the left and right sides of each outlet. A fiber filter screen is provided on the lower side of each outlet. A riser is provided on the lower side of each fiber filter screen. An ingate is fixedly connected to the lower side of each riser. A locking frame is installed on the outer side of each riser. The locking frame includes a sleeve fixed to the outer side of the riser. A folding rod is fixedly connected to both the left and right sides of the sleeve. A rotating block is fixedly connected to the upper end of each folding rod. A rotating sleeve is rotatably connected to the outer side of each rotating block. A retaining sleeve is fixedly connected to the upper side of each rotating sleeve. Notches are opened on both the left and right sides of the upper hole of the retaining sleeve.

[0007] Preferably, the lock head includes a base block fixed to the lower end face of the horizontal runner, and a protrusion inside the insert sleeve is fixedly connected to the lower side of the base block. The lower front and rear sides of the protrusion are fixedly connected to a locking block located inside the insert sleeve.

[0008] Preferably, the notch is a fan-shaped structure, the card block is a fan-shaped block structure, and the size of the fan-shaped opening of the notch is the same as the cross-sectional size of the card block.

[0009] Preferably, the length and width of the fiber filter screen are greater than the upper length and width of the riser, the distance between the upper end face of the riser and the lower end face of the transverse runner is the same as the thickness of the fiber filter screen, and the riser is a guide shell structure that is wider at the top and narrower at the bottom.

[0010] Preferably, the horizontal runner is composed of a first section and a second section, the height difference between the first section and the second section of the horizontal runner is 7.5 mm, and the top surface of the first section and the second section of the horizontal runner is designed with a 1.5° slope.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, the pouring cup, sprue, grate, fiber filter, riser, lock frame, and lock head are designed to deliver molten iron into the sprue. The sprue then diverts the molten iron into the grate on both sides. The structure of the grate creates a significant "throttling-pressurization" effect during the flow of molten iron, providing initial purification. The fiber filter provides secondary purification, the riser provides tertiary purification, and the lock frame and lock head position the riser for easy cleaning. Simply removing the riser is sufficient, enabling large oil pan casting devices to rapidly fill the mold with molten iron from top to bottom along the shortest path during casting. This ensures a uniform temperature gradient in the mold cavity and controlled solidification sequence. Furthermore, a three-stage slag-blocking mechanism continuously and efficiently removes oxide slag, sulfide slag, and non-metallic inclusions from the molten iron, resulting in a high-quality oil pan free of cold shuts, slag inclusions, and shrinkage cavities. It also facilitates subsequent riser maintenance by staff, solving the problems of erosion, splashing, cold shuts, slag inclusions, shrinkage cavities, and difficult riser cleaning associated with traditional side-pouring casting methods. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This utility model Figure 1 A schematic diagram of the structure at point A;

[0015] Figure 3 This is a schematic diagram of the oblique upward view of the horizontal gating structure of this utility model;

[0016] Figure 4 This is a partial cross-sectional view of the lock frame of this utility model;

[0017] Figure 5 This is a schematic diagram of the lock head of this utility model;

[0018] Figure 6 This is a partial structural diagram of the horizontal gating system of this utility model;

[0019] Figure 7 This is a structural schematic diagram of Example 1 of this utility model;

[0020] Figure 8 This is a structural schematic diagram of Case 2 of this utility model.

[0021] In the diagram: 1. Sprue cup; 2. Sprue; 3. Runner; 4. Outlet; 5. Fiber filter screen; 6. Riser; 7. Ingate; 8. Locking frame; 81. Hoop; 82. Folding rod; 83. Rotating block; 84. Rotating sleeve; 85. Clamping sleeve; 86. Notch; 9. Lock head; 91. Base block; 92. Protrusion; 93. Clamping block. Detailed Implementation

[0022] 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.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0025] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0026] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0027] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0028] Please see Figure 1-8 This utility model provides a technical solution:

[0029] A large oil pan casting device includes a pouring cup 1. A straight sprue 2 is fixedly connected to the lower side of the pouring cup 1. Horizontal sprues 3 are fixedly connected to both sides of the lower part of the straight sprue 2. Several outlets 4 are equidistantly arranged on the lower side of the horizontal sprues 3. Lock heads 9 are fixedly connected to the lower end face of the horizontal sprues 3 on both the left and right sides of each outlet 4. Fiber filters 5 are provided on the lower side of each outlet 4, and caps are provided on the lower side of each fiber filter 5. The lower side of the riser 6 is fixedly connected to an inner sprue 7 that is connected in a continuous manner. The outer side of the riser 6 is equipped with a locking frame 8. The locking frame 8 includes a sleeve 81 fixed to the outer side of the riser 6. The left and right sides of the sleeve 81 are fixedly connected to a folding rod 82. The upper end of the folding rod 82 is fixedly connected to a rotating block 83. The outer side of the rotating block 83 is rotatably connected to a rotating sleeve 84. The upper side of the rotating sleeve 84 is fixedly connected to a retaining sleeve 85. The upper hole of the retaining sleeve 85 has notches 86 on both the left and right sides.

[0030] The locking head 9 includes a base block 91 fixed to the lower end face of the horizontal runner 3. A protruding head 92 is fixedly connected to the lower side of the base block 91 and to the inner side of the insert sleeve 85. The lower front and rear sides of the protruding head 92 are fixedly connected to the locking blocks 93 located inside the sleeve 85. The locking head 9 can lock the locking frame 8 in place, thereby fixing the riser 6. The notch 86 has a fan-shaped opening structure, and the locking block 93 has a fan-shaped block structure. The fan-shaped opening size of the notch 86 is the same as the cross-sectional size of the locking block 93. This configuration allows the clamping block 93 to pass through the notch 86; the length and width of the fiber filter screen 5 are larger than the upper length and width of the riser 6, ensuring that all molten iron entering the riser 6 passes through the fiber filter screen 5. The distance between the upper end face of the riser 6 and the lower end face of the horizontal gating 3 is the same as the thickness of the fiber filter screen 5, allowing for clamping and positioning of the fiber filter screen 5. The riser 6 has a guide shell structure that is wider at the top and narrower at the bottom, ensuring that molten iron entering the riser 6 passes through the fiber filter screen 5. The molten iron flow rate decreases significantly due to the sudden expansion of the upper cavity cross-section of riser 6, which weakens the turbulence and makes the temperature gradient more uniform. This allows the lighter residual inclusions to continue to float and accumulate at the top of riser 6. Meanwhile, the bottleneck structure formed by the necking at the bottom of riser 6 only allows the lower layer of clean molten iron to enter the ingate 7, which is directly connected to the bottom of riser 6, at a controlled flow rate. The horizontal sprue 3 consists of a first section and a second section. The height difference between the first and second sections of the horizontal sprue 3 is 7.5 mm. The top surfaces of the first and second sections of the horizontal sprue 3 are designed with a 1.5° slope. This design creates a significant "throttling-pressurization" effect during the flow of molten iron. The flow rate decreases rapidly after entering the wide area and increases sharply in the narrow area, and the pressure rises accordingly. This effectively disrupts the continuity of the oxide film and uses the gravity difference and the slope to make the less dense oxide slag, sulfide slag, and other non-metallic inclusions float and adhere to the top surface of the horizontal sprue 3.

[0031] Workflow: The casting operation of the gating device for large oil pans is as follows. Note: The oil pan to be formed in this application weighs 500 kg per piece, is made of ductile iron, and is molded using a resin self-hardening sand process. To ensure excellent surface quality and internal structure of the oil pan bottom, and to effectively avoid casting defects such as cold shuts, shrinkage porosity, and slag inclusions, the oil pan mold opening is placed upwards during process layout, and a top-pouring method is adopted. The entire gating device is concentrated in the top area of ​​one side of the mold opening. At the start of the casting operation, the operator continuously and smoothly pours molten iron from the pouring cup 1 into the sprue 2. The molten iron is first evenly distributed in the sprue 2, and then enters the symmetrically arranged horizontal runners 3. The horizontal sprue 3 adopts a two-stage pressurized structure, with a 7.5mm height difference between the first and second stages and a continuous 1.5° slope on the top surface of both stages. This geometric change produces a significant "throttling-pressurization" effect during the flow of molten iron: the flow velocity decreases rapidly after entering the wide zone and increases sharply in the narrow zone, and the pressure rises accordingly. This effectively disrupts the continuity of the oxide film and uses the gravity difference and the slope to cause the less dense oxide slag, sulfide slag, and other non-metallic inclusions to float and adhere to the top surface of the horizontal sprue 3, thus completing the first purification. Subsequently, the molten iron passes through the outlets 4 on the lower side of the horizontal sprue 3 under a stable pressure, and passes through the fiber filter screens 5 (1.5mm × 1) installed at each outlet 4.A 5mm mesh mechanically intercepts slag particles larger than the mesh size, achieving a second purification. The molten iron, after double purification, then enters the riser 6 located below the horizontal gating 3. The sudden expansion of the riser 6 cavity cross-section significantly reduces the molten iron flow velocity, weakens turbulence, and homogenizes the temperature gradient. Lighter residual inclusions have sufficient time to continue to float and accumulate at the top of the riser 6. The bottleneck structure formed by the necking at the bottom of the riser 6 only allows the lower layer of clean molten iron to enter the ingate 7, which is directly connected to the bottom of the riser 6, at a controlled flow rate. The necking also delays heat dissipation, providing a continuous and stable source of hot metal for subsequent solidification and feeding. This ensures that the 500kg ductile iron oil pan achieves a high-quality bottom surface and a dense overall structure in the resin self-hardening sand mold, free from cold shuts, slag inclusions, and shrinkage porosity. When cleaning the riser 6 is required, simply rotate the clamps 85 on both sides of the locking frame 8. The rotation of the clamps 85 can move the notches on both sides. Displacement is performed at 86, aligning the displaced notch 86 with the locking block 93 of the lock head 9. At this point, the lock frame 8 can be lowered, allowing the notch 86 to pass through the locking block 93, separating the sleeve 85 from the lock head 9. This eliminates the locking relationship between the lock frame 8 and the lock head 9, allowing the riser 6 to be removed. This enables workers to clean the riser 6 or replace the fiber filter screen 5 as needed. This system allows for rapid filling of the mold from top to bottom along the shortest path during casting in large oil pans, ensuring a uniform temperature gradient in the mold cavity and controlled solidification sequence. Through a three-stage slag-blocking mechanism, it continuously and efficiently removes oxide slag, sulfide slag, and non-metallic inclusions from the molten iron, resulting in a high-quality oil pan free of cold shuts, slag inclusions, and shrinkage cavities. It also facilitates subsequent maintenance of the riser 6, solving the problems of erosion, splashing, cold shuts, slag inclusions, shrinkage cavities, and difficult cleaning of the riser 6 associated with traditional side-pouring casting systems.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large oil pan casting apparatus, comprising a pouring cup (1), characterized in that: The lower side of the pouring cup (1) is fixedly connected to a sprue (2) that is in a continuous arrangement. Both sides of the lower part of the sprue (2) are fixedly connected to transverse runners (3) that are in a continuous arrangement. The lower side of the transverse runner (3) has several outlets (4) arranged at equal intervals. Both sides of each outlet (4) are provided with locks (9) that are fixedly connected to the lower end face of the transverse runner (3). Each outlet (4) has a fiber filter screen (5) on its lower side, and each fiber filter screen (5) has a riser (6) on its lower side. Each riser (6) has a fixed... An inner gating system (7) is fixedly connected to the riser (6). A locking frame (8) is installed on the outer side of each riser (6). The locking frame (8) includes a sleeve (81) fixed on the outer side of the riser (6). A folding rod (82) is fixedly connected to the left and right sides of the sleeve (81). A rotating block (83) is fixedly connected to the upper end of each folding rod (82). A rotating sleeve (84) is rotatably connected to the outer side of each rotating block (83). A retaining sleeve (85) is fixedly connected to the upper side of each rotating sleeve (84). A notch (86) is opened on the left and right sides of the upper hole of the retaining sleeve (85).

2. The large oil pan casting device according to claim 1, characterized in that: The lock head (9) includes a base block (91) fixed to the lower end face of the horizontal runner (3). The lower side of the base block (91) is fixedly connected to a protrusion (92) inside the insert sleeve (85). The lower front and rear sides of the protrusion (92) are fixedly connected to a card block (93) inside the sleeve (85).

3. A large oil pan casting device according to claim 2, characterized in that: The notch (86) is a fan-shaped structure, and the card block (93) is a fan-shaped block structure. The size of the fan-shaped opening of the notch (86) is the same as the cross-sectional size of the card block (93).

4. A large oil pan casting device according to claim 2, characterized in that: The length and width of the fiber filter (5) are greater than the upper length and width of the riser (6). The distance between the upper end face of the riser (6) and the lower end face of the transverse runner (3) is the same as the thickness of the fiber filter (5). The riser (6) is a guide shell structure that is wider at the top and narrower at the bottom.

5. A large oil pan casting device according to claim 2, characterized in that: The horizontal runner (3) consists of a first section and a second section. The height difference between the first section and the second section of the horizontal runner (3) is 7.5 mm. The top surfaces of the first section and the second section of the horizontal runner (3) are designed with a slope of 1.5°.

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