Double-riser caliber feeding sand core

Abstract

The utility model discloses a double-riser-caliber feeding sand core which comprises a middle core and two castings which are symmetrically arranged on the side wall of the middle core, the middle core is provided with a riser body, the double-riser-caliber feeding sand core further comprises a partition plate core arranged on the side wall of the middle core, the partition plate core is located between the two castings, one side of the partition plate core is provided with an inner pouring gate, and the other side of the partition plate core is provided with an outer pouring gate. The side wall of the middle core is provided with two riser openings which are symmetrically arranged, the two riser openings communicate with the two castings and the riser body correspondingly, and the riser body is provided with a supplementing assembly used for conducting heat supplementing on casting molten iron. According to the double-riser-caliber feeding sand core disclosed by the utility model, a central sand core double-riser-caliber process is adopted, and double riser calibers are arranged by one riser to respectively feed an upper-layer casting and a lower-layer casting, so that the problem that a lower-layer product cannot be fed is solved while synchronous casting of the two castings is realized; and therefore, the production efficiency of castings is improved, the casting cost is saved, and the product quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of bearing housing casting technology, specifically a double-gauge feeding sand core. Background Technology

[0002] During the casting process of bearing housings, due to the structural characteristics of the product, there are differences in wall thickness, which will cause different solidification times of molten iron. If molten iron is not replenished in time at the last solidified part, it will cause shrinkage porosity and shrinkage cavities in the product. The common casting process is to set risers at the hot spots of the product and replenish the shrinkage through the riser diameter. However, for products with large outline dimensions and light weight, the traditional method will result in high production costs. Moreover, due to the small amount of molten iron required, the molten iron will be held at a high temperature in the furnace for a long time, which often causes product quality defects. At the same time, the traditional casting method of bearing housings is single-layer casting, which easily leads to low process yield and high production costs.

[0003] Therefore, there is an urgent need for a double-gauge feeding sand core to solve the above problems. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: a double-riser feeding sand core, comprising a core and two symmetrically arranged castings disposed on the sidewall of the core. The core is provided with a riser body and also includes a partition core disposed on the sidewall of the core. The partition core is located between the two castings. An ingate is provided on one side of the partition core. The sidewall of the core is provided with two symmetrically arranged riser diameters. The two riser diameters are respectively connected to the two castings and the riser body. The riser body is provided with a supplementary component for supplementing the heat of the molten iron.

[0005] The supplementary component includes a supplementary tube snapped onto one end of the riser body. The end of the supplementary tube away from the core is sealed. The supplementary tube has a filling hole filled with heating material. The inner wall of the supplementary tube has multiple heating holes. The supplementary tube is equipped with an adjustment component for adjusting the heat dissipation of each heating hole. The end of the supplementary tube near the core is detachably connected to a sealing plate.

[0006] The adjustment assembly includes an adjustment tube rotatably connected inside the supplementary tube. The side wall of the adjustment tube has multiple adjustment holes, each of which is matched with a heating hole. The supplementary tube is provided with a limiting assembly for limiting the adjustment holes.

[0007] The limiting assembly includes a limiting rod rotatably connected to the end of the supplementary tube away from the sealing plate. One end of the limiting rod is connected to the adjusting tube. A limiting ring is fixedly connected to the side wall of the limiting rod. Multiple limiting holes are arranged in a ring array on the side wall of the limiting ring. A fixing plate is fixedly connected to the side of the supplementary tube near the limiting ring. A limiting plate is connected to the side of the fixing plate near the limiting rod through a pressing assembly. The two opposite side walls of the limiting plate are provided with inclined surfaces.

[0008] A rotating disk is fixedly connected to the end of the limiting rod away from the center.

[0009] The extrusion assembly includes a T-shaped rod slidably connected to a fixed plate. One end of the T-shaped rod is connected to a limiting plate. A spring is sleeved on the side wall of the T-shaped rod, and both ends of the spring are connected to the fixed plate and the side wall of the T-shaped rod, respectively.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This utility model's double-riser feeding sand core adopts a central sand core double-riser process, using a single riser to set two risers to feed the upper and lower layers of castings respectively. This solves the problem of the lower layer not being able to feed while simultaneously casting two castings, thereby improving casting production efficiency, saving casting costs, and ensuring product quality. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the heating element and the regulating element of this utility model;

[0014] Figure 3 This is a schematic diagram of the limiting component structure of this utility model;

[0015] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0016] In the diagram: 101, casting; 102, core; 103, riser body; 2, ingate; 3, partition core; 4, riser diameter; 501, replenishing pipe; 502, filling hole; 503, heating hole; 504, sealing plate; 601, adjusting pipe; 602, adjusting hole; 701, limiting rod; 702, limiting ring; 703, limiting hole; 704, fixing plate; 705, limiting plate; 706, rotating disk; 707, inclined plane; 801, T-shaped rod; 802, spring. Detailed Implementation

[0017] 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.

[0018] Example 1

[0019] Please see Figures 1-4 The figure shows a double-riser feeding sand core, including a core 102 and two symmetrically arranged castings 101 disposed on the side wall of the core 102. The core 102 is provided with a riser body 103 and also includes a partition core 3 disposed on the side wall of the core 102. The partition core 3 is located between the two castings 101. An ingate 2 is provided on one side of the partition core 3. The side wall of the core 102 is provided with two symmetrically arranged riser diameters 4. The two riser diameters 4 are respectively connected to the two castings 101 and the riser body 103. The riser body 103 is provided with a supplementary component for supplementing the heat of the casting iron.

[0020] It should be noted that the central sand core double riser process is adopted, which uses one riser to set up two risers to feed the upper and lower castings 101 respectively. This solves the problem of the lower product not being able to feed the lower product while achieving synchronous casting of the two castings 101. As a result, the production efficiency of casting 101 is improved, the casting cost is reduced, and the product quality is guaranteed.

[0021] Please see Figures 1-3 The supplementary components shown in the figure include a supplementary tube 501 that is snapped onto one end of the riser body 103. The end of the supplementary tube 501 away from the core 102 is sealed. The supplementary tube 501 has a filling hole 502, which is filled with heating material. The inner wall of the supplementary tube 501 has multiple heating holes 503. The supplementary tube 501 is equipped with an adjustment component for adjusting the heat dissipation of each heating hole 503. The end of the supplementary tube 501 near the core 102 is detachably connected to a sealing plate 504.

[0022] It should be noted that by adding components, the riser body 103 is kept at a high temperature, and the molten iron inside does not solidify quickly.

[0023] Please see Figure 2 and Figure 3 The adjustment assembly shown in the figure includes an adjustment tube 601 rotatably connected to the supplement tube 501. The side wall of the adjustment tube 601 is provided with a plurality of adjustment holes 602. Each adjustment hole 602 is matched with the heating hole 503. The supplement tube 501 is provided with a limiting assembly for limiting the adjustment holes 602.

[0024] It should be noted here that by adjusting the settings of the components, the heat supplied to the molten iron by the replenishment pipe 501 can be adjusted. This allows for the adjustment of the heat generated by the molten iron in the riser body 103 during the solidification process of the bearing housing, based on factors such as wall thickness differences, during the casting process of different types of bearing housings. This provides continuous and precise feeding to the casting 101. Furthermore, reasonable heat adjustment helps control the cooling rate during the solidification process of the bearing housing, resulting in finer grains and improved mechanical properties of the bearing housing.

[0025] Working principle: When pouring casting 101, molten iron first flows through the sprue and grate, then into the ingate 2. During the filling process, simulation software can be used to plan in advance to ensure that the lower casting 101 is filled first, followed by the upper casting 101. Figure 1 This filling sequence ensures that the casting 101 and the riser body 103 exhibit a temperature distribution state of hot at the top and cool at the bottom, creating conditions for sequential solidification.

[0026] During the continuous pouring of molten iron, when the molten iron rises to the position of riser diameter 4, the excess molten iron will enter the riser body 103 to continue filling the mold. Under the action of the heating element, the riser body 103 maintains a high temperature, and the molten iron inside will not solidify quickly. As the casting 101 cools and solidifies, the volume of the first solidified part shrinks. At this time, the molten iron in the riser body 103 continuously replenishes the casting 101 through the double riser diameter 4. Since the double riser diameter 4 is connected to the upper and lower layers of casting 101 respectively, it can simultaneously replenish the upper and lower layers of casting 101, avoiding defects such as shrinkage porosity and shrinkage cavities caused by the untimely replenishment of molten iron during the solidification process of casting 101.

[0027] Furthermore, during the casting process of casting 101, the temperature distribution of hot at the top and cool at the bottom causes casting 101 to gradually solidify from bottom to top and from the part away from riser body 103 toward riser body 103. As the last part to solidify, riser body 103 continuously provides molten iron to casting 101, ensuring the smooth progress of the solidification process of casting 101, achieving a good feeding effect, and improving the quality of casting 101.

[0028] Simultaneously, during the casting of part 101, the heating material inside the replenishing pipe 501 releases a large amount of heat when it reacts chemically with oxygen in the air, providing a continuous heat source for the molten iron inside the riser body 103. This allows the molten iron inside the riser body 103 to remain liquid for a longer period of time, facilitating feeding of part 101. Furthermore, by rotating the regulating pipe 601 and limiting it with the limiting component, the regulating holes 602 on the regulating pipe 601 interact with the multiple heating holes 503 on the inner wall of the replenishing pipe 501. Incorrect. Furthermore, by adjusting the phase difference between the adjustment hole 602 and the heating hole 503, the heat supplied by the replenishing pipe 501 to the molten iron can be adjusted. This allows for the adjustment of the heat generated by the molten iron in the riser body 103 during the solidification process of the bearing housing, based on factors such as wall thickness differences, during the casting process of different types of bearing housings. This provides continuous and precise feeding for the casting 101, and reasonable heat adjustment helps control the cooling rate during the solidification process of the bearing housing, allowing the grains to be refined and improving the mechanical properties of the bearing housing.

[0029] Example 2

[0030] Please see Figure 4 This embodiment further illustrates Example 1. The limiting component shown in the figure includes a limiting rod 701 rotatably connected to the end of the supplement tube 501 away from the sealing plate 504. One end of the limiting rod 701 is connected to the adjusting tube 601. A limiting ring 702 is fixedly connected to the side wall of the limiting rod 701. A plurality of limiting holes 703 are arranged in a ring array on the side wall of the limiting ring 702. A fixing plate 704 is fixedly connected to the side of the supplement tube 501 near the limiting ring 702. A limiting plate 705 is connected to the side of the fixing plate 704 near the limiting rod 701 through a pressing component. Inclined surfaces 707 are opened on the two opposite side walls of the limiting plate 705. A rotating disk 706 is fixedly connected to the end of the limiting rod 701 away from the core 102.

[0031] It should be noted here that: through the setting of the limiting component, during the rotation of the rotating disk 706, the limiting rod 701 will be driven to rotate. During the rotation of the limiting rod 701, the multiple limiting holes 703 on the side wall of the limiting ring 702 will be driven to rotate. During the rotation of each limiting hole 703, when the limiting hole 703 abuts against the side wall of the limiting plate 705, the limiting plate 705 will be pushed away from the limiting ring 702 under the guidance of the inclined surface 707 and the extrusion component.

[0032] After the adjustment tube 601 has been rotated, the rotation of the rotating disk 706 is stopped. At this time, under the elastic action of the extrusion assembly, the limiting plate 705 will be pushed into the limiting hole 703 and abut against the bottom wall of the limiting hole 703. Under the pressing action of the limiting plate 705, the limiting ring 702 is limited, thereby limiting the adjustment tube 601 at one end of the limiting rod 701, thus ensuring the stability of the adjustment tube 601 during use.

[0033] Please see Figure 4 The extrusion assembly shown in the figure includes a T-shaped rod 801 that is slidably connected to a fixed plate 704. One end of the T-shaped rod 801 is connected to a limiting plate 705. A spring 802 is sleeved on the side wall of the T-shaped rod 801. The two ends of the spring 802 are respectively connected to the fixed plate 704 and the side wall of the T-shaped rod 801.

[0034] It should be noted here that the compression component is used to guide and reset the limit plate 705.

[0035] It is worth noting that the T-shaped rod 801 is connected to the fixed plate 704 by a keyway and a key pin, which provides guidance for the movement of the T-shaped rod 801.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A double riser diameter feeding sand core, comprising: a core (102) and two mutually symmetrical castings (101) arranged on the side wall of the core (102), the core (102) being provided with a riser body (103); characterized in that it further comprises: a partition core (3) arranged on the side wall of the core (102), the partition core (3) being located between the two castings (101), one side of the partition core (3) being provided with a ingate (2), the side wall of the core (102) being provided with two mutually symmetrical riser diameters (4), the two riser diameters (4) being respectively arranged in communication with the two castings (101) and the riser body (103), the riser body (103) being provided with a supplement assembly for supplementing the heat of the molten iron.

2. A dual riser diameter feeding sand core according to claim 1, characterized in that: The supplement assembly comprises a supplement pipe (501) clamped at one end of the riser body (103), the end of the supplement pipe (501) away from the core (102) being provided with a sealing plate, the supplement pipe (501) being provided with a filling hole (502), the filling hole (502) being filled with a heating material, the inner wall of the supplement pipe (501) being provided with a plurality of heating holes (503), the supplement pipe (501) being provided with an adjusting assembly for adjusting the heat dissipation of each heating hole (503), the end of the supplement pipe (501) close to the core (102) being detachably connected with a sealing plate (504).

3. A dual riser diameter feeder back sand core according to claim 2, characterized in that: The adjusting assembly comprises an adjusting pipe (601) rotatably connected in the supplement pipe (501), the side wall of the adjusting pipe (601) being provided with a plurality of adjusting holes (602), each adjusting hole (602) being arranged in matching with a heating hole (503), the supplement pipe (501) being provided with a limiting assembly for limiting the adjusting hole (602).

4. A dual riser draft hole feeding sand core according to claim 3, characterized in that: The limiting assembly comprises a limiting rod (701) rotatably connected at the end of the supplement pipe (501) away from the sealing plate (504), one end of the limiting rod (701) being connected with the adjusting pipe (601), the side wall of the limiting rod (701) being fixedly connected with a limiting ring (702), the side wall of the limiting ring (702) being annularly arranged with a plurality of limiting holes (703), one side of the supplement pipe (501) close to the limiting ring (702) being fixedly connected with a fixed plate (704), one side of the fixed plate (704) close to the limiting rod (701) being connected with a limiting plate (705) through a pressing assembly, the opposite side walls of the limiting plate (705) being provided with inclined surfaces (707).

5. A dual riser diameter feeding sand core according to claim 4, characterized in that: The end of the limiting rod (701) away from the core (102) is fixedly connected with a rotating disc (706).

6. A dual riser gauge feeder feeding core according to claim 5, characterized in that: The pressing assembly comprises a T-shaped rod (801) slidingly connected with the fixed plate (704), one end of the T-shaped rod (801) being connected with the limiting plate (705), the side wall of the T-shaped rod (801) being sleeved with a spring (802), both ends of the spring (802) being respectively connected with the fixed plate (704) and the side wall of the T-shaped rod (801).

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