Brake drum pouring system
By designing a brake drum casting system including mold cavity, straight runner, transverse runner and inner runner, the sand hole problem in the clay sand casting brake drum is solved, and the effect of improving the quality and yield of the brake drum is achieved.
Patent Information
- Application Number
- CN202422101845.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-28
AI Technical Summary
In the manufacturing process of using clay sand to cast brake drums, due to the low strength of clay sand, the erosion of metal liquid can easily cause dense sand holes to occur, resulting in poor appearance and product scrapping, affecting the quality and yield of the product.
A braking drum casting system is designed, including a cavity, a straight runner, a transverse runner and an inner runner. By setting a blocking cross-section and overlap section, the flow rate and flow rate of the metal liquid are controlled to prevent the metal liquid from eroding the overlap section and cross-flow section, and to reduce the formation of sand holes.
It effectively reduces the sand hole phenomenon of the brake drum, improves the quality and yield of the brake drum, and improves the appearance and performance of the product.
Smart Images
Figure CN222944454U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of automobile manufacturing, in particular to a brake drum casting system. Background Art
[0002] The brake drum of a vehicle is an indispensable and major component in the automobile manufacturing process. It has a large market demand and is vulnerable. The brake drum is a security part of the car and has an important impact on driving safety. There are currently many ways to manufacture brake drums on the market. The ordinary clay sand casting production process has many advantages such as high production efficiency, low input cost and strong adaptability, and is still the main production method for manufacturing brake drum castings.
[0003] However, in the manufacturing process of using clay sand to cast brake drums, due to the low strength of clay sand, the erosion of molten metal can easily cause dense sand holes in the brake drum, resulting in poor appearance of the brake drum and product scrapping, seriously affecting the appearance quality and yield rate of the product. Utility Model Content
[0004] One purpose of the utility model is to solve the deficiencies in the prior art and provide a brake drum casting system which can reduce the sand holes in the brake drum and improve the quality of the brake drum.
[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A brake drum casting system, comprising:
[0007] a cavity for forming a brake drum;
[0008] A sprue, one end of which is an inlet end, and the inlet end is used to receive the molten metal;
[0009] A horizontal runner is arranged around the outside of the cavity, and the horizontal runner includes an overlapping section and a cross-flow section that are connected to each other, the overlapping section is connected to the other end of the straight runner, the connecting surface between the overlapping section and the straight runner is a flow-blocking section, and the cross-flow section extends along the circumference of the cavity;
[0010] An ingrate, one end of which is disposed on a side of the cross flow section close to the brake drum and extends toward the mold cavity, and an outlet end of the ingrate is communicated with the mold cavity;
[0011] Wherein, the cross-sectional area of the overlapping section is larger than the flow-blocking cross-sectional area, and the flow-blocking cross-sectional area is smaller than the cross-sectional area of the cross-flow section.
[0012] In an exemplary embodiment, the cross-sectional area of the cross-flow section is smaller than the cross-sectional area of the ingrowth.
[0013] In an exemplary embodiment, the cross-sectional area of the overlap section is larger than the cross-sectional area of the cross-flow section.
[0014] In an exemplary embodiment, the cross-sectional area of the sprue is greater than the flow-blocking cross-sectional area.
[0015] In an exemplary embodiment, the cross-sectional area of the overlapping section is 2.0-2.6 times the cross-sectional area of the flow-blocking section; the cross-sectional area of the overlapping section is 1.5-1.7 times the cross-sectional area of the cross-flow section.
[0016] In an exemplary embodiment, the cross-sectional area of the sprue is 2.0-2.5 times the cross-sectional area of the flow-blocking portion.
[0017] In an exemplary embodiment, the ingates include a plurality of ingates, the plurality of ingates are sequentially arranged on the cross-flow section, and the sum of the cross-sectional areas of the plurality of ingates is greater than the cross-sectional area of the cross-flow section.
[0018] In an exemplary embodiment, the number of the gates is three.
[0019] In an exemplary embodiment, the ingrate is in a step shape, one end of the ingrate is connected to the cross flow section, and the other end is bent downward and extended to be connected to the cavity.
[0020] In an exemplary embodiment, a filter block is provided in the sprue, and a filter net is provided in the filter block.
[0021] It can be seen from the above technical solution that the utility model has at least the following advantages and positive effects:
[0022] The brake drum casting system in the utility model includes a mold cavity, a sprue, a cross runner and an ingrown runner. The sprue, the cross runner and the ingrown runner are arranged on the outside of the mold cavity, and are used to drain the mold cavity and inject molten metal. The cross-sectional area of the sprue is larger than the flow-blocking cross-sectional area, and the flow-blocking cross-sectional area is smaller than the cross-sectional area of the cross-flow section. The cross-sectional area of the overlapping section is larger than the flow-blocking cross-sectional area. After the cross-sectional area of the overlapping section is increased, the flow rate of the molten metal can be effectively reduced, and the molten metal can be prevented from scouring the overlapping section at the connection between the overlapping section and the straight flow channel. In addition, the flow-blocking cross-sectional area is also smaller than the cross-sectional area of the cross-flow section, which prevents the molten metal from scouring the cross-flow section, causing sand particles to enter the mold cavity with the molten metal to form dense sand holes on the appearance of the casting. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of a brake drum casting system according to one embodiment.
[0024] Figure 2 yes Figure 1 Side view of the brake drum gating system shown.
[0025] Figure 3 yes Figure 1 A top view of the brake drum gating system is shown.
[0026] Figure 4 yes Figure 1 A bottom view of the brake drum gating system is shown.
[0027] Figure 5 yes Figure 1 A side view of the brake drum casting system from another angle is shown.
[0028] The description of the accompanying drawings is as follows: 1. brake drum casting system; 11. cavity; 12. straight runner; 121. inlet end; 122. inlet flow channel; 123. bent flow channel; 124. filter block; 13. cross runner; 131. overlap section; 132. cross flow section; 14. inner runner; 15. flow-blocking section. DETAILED DESCRIPTION
[0029] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.
[0030] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.
[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0032] See also Figure 1 and Figure 2The present invention provides a brake drum pouring system 1. The brake drum pouring system 1 may include a cavity 11, a sprue 12, a runner 13, and an ingode 14. The molten metal flows into the runner 13 through the sprue 12, and then flows into the cavity 11 through the ingode 14. The cavity 11 is used for casting a component. Specifically, in the present embodiment, the component may be a brake drum of different models and sizes.
[0033] The mold cavity 11 is a chamber for casting. The shape of the mold cavity 11 is adapted to the shape of the casting. Specifically in this embodiment, the mold cavity 11 is a circular cavity structure for molding a brake drum. The sprue 12, the runner 13 and the ingrate 14 are arranged around the outside of the mold cavity 11 to drain and inject molten metal into the mold cavity 11.
[0034] One end of the sprue 12 is an inlet end 121. The inlet end 121 is used to access the molten metal. Specifically in the present embodiment, the sprue 12 is roughly L-shaped. The sprue 12 includes an inlet runner 122 and a bending runner 123. The inlet runner 122 may be in a circular tubular shape. The flow direction of the inlet runner 122 is perpendicular to the plane where the cavity 11 is located. And the direction of the inlet runner 122 may be set to a direction that facilitates the access of the molten metal. The bending runner 123 is perpendicular to the inlet runner 122, and the bending runner 123 reverses the flow direction of the molten metal.
[0035] Furthermore, in the present embodiment, a filter block 124 is provided in the sprue 12, and a filter screen is provided in the filter block 124. Specifically, the filter block 124 is provided in the curved flow channel 123. The filter screen in the filter block 124 can filter the residue and bubbles in the molten metal, and can buffer the flow rate of the molten metal in the sprue 12 to improve the casting quality of the casting.
[0036] The runner 13 includes an overlap section 131 and a cross flow section 132 which are connected to each other. The overlap section 131 is located at the front end of the runner 13, and the cross flow section 132 is located at the rear end of the runner 13. The overlap section 131 is connected to the curved flow channel 123 of the sprue 12. The overlap section 131 and the sprue 12 are connected to each other by overlapping.
[0037] See also Figure 3 and Figure 4 , wherein the overlapping connecting surface between the overlapping section 131 and the sprue 12 is the blocking section 15. The blocking section 15 is the part with the smallest cross-sectional area in the brake drum casting system provided in this embodiment, and the blocking section 15 can control the flow rate and flow of the molten metal to ensure that the molten metal can flow smoothly into the mold cavity 11, avoid spraying, splashing and other phenomena, thereby reducing defects of the casting.
[0038] Moreover, the cross-sectional area of the overlap section 131 is larger than the area of the flow-blocking section 15. The cross-sectional area of the overlap section 131 is increased relative to the size of the flow-blocking section 15, which can effectively reduce the flow rate of the molten metal and prevent the molten metal from scouring the overlap section 131 at the connection between the overlap section 131 and the sprue 12.
[0039] The cross flow section 132 is arranged on the side of the overlap section 131 away from the straight runner 12. The cross flow section 132 is the main flow channel for guiding the molten metal. The cross flow section 132 extends from the overlap section 131 along the circumference of the cavity 11. The central angle corresponding to the cross flow section 132 can reach 120 degrees, so that the flow length of the molten metal can be long enough, so that the molten metal can flow evenly into the straight cavity 11.
[0040] The area of the blocking section 15 is smaller than the cross-sectional area of the cross-flow section 132. The area of the blocking section 15 is also smaller than the cross-sectional area of the cross-flow section 132, which prevents the molten metal from scouring the cross-flow section 132, causing sand particles to enter the mold cavity 11 with the molten metal to form dense sand holes on the casting appearance. A blocking flow is set at the front end of the runner 13, and the blocking section 15 is reduced, which can avoid serious scouring at the front end of the runner 13 and avoid dense sand holes on the brake drum appearance.
[0041] Moreover, the cross-sectional area of the overlapping section 131 is larger than the cross-sectional area of the cross-flow section 132. The larger cross-sectional area of the overlapping section 131 can alleviate the molten metal flowing in from the direct casting section. Moreover, the cross-sectional area of the cross-flow section 132 is slightly reduced, which can also maintain the flow rate of the molten metal. Specifically, the cross-sectional area of the overlapping section 131 is 1.5-1.7 times the cross-sectional area of the cross-flow section 132. The proportional relationship between the cross-sectional areas of the overlapping section 131 and the cross-flow section 132 can prevent the molten metal from scouring the flow channel, and can also prevent the flow rate of the molten metal from being too fast or too slow, affecting the quality of the casting.
[0042] Specifically, in this article, in order to conveniently explain the area size of each flow channel, the area size of the flow blocking section 15 is defined as 1, and other areas are compared with the flow blocking section 15 to illustrate the specific size relationship of their areas.
[0043] Specifically in this embodiment, the cross-sectional area of the sprue 12 is 2.0-2.5 of the flow-blocking cross-sectional area 15 . The cross-sectional area of the overlap section 131 is 2.0-2.6 times of the flow-blocking cross-sectional area 15 .
[0044] See also Figure 5, one end of the ingrate 14 is arranged on the side of the cross-flow section 132 close to the cavity 11, and extends toward the cavity 11, and the other end of the ingrate 14 is an outlet end, which is connected to the cavity 11, and the molten metal flows into the cavity 11. Specifically in this embodiment, the ingrate 14 includes a plurality of ingrates 14, and the plurality of ingrates 14 are sequentially arranged on the cross-flow section 132. The sum of the cross-sectional areas of the plurality of ingrates 14 is greater than the cross-sectional area of the cross-flow section 132. Accordingly, the cross-sectional area of the ingrate 14 can be 1.7-2.0 times that of the flow-blocking section 15.
[0045] The ingrate 14 is in the shape of a flat tube. The cross-sectional shape of the ingrate 14 is a rectangle with a long length and a small width. In addition, the ingrate 14 is bent downward and extended from the runner 13, and is connected to the cavity 11 in a step-like manner. The shape of the ingrate 14 allows the molten metal to flow into the cavity 11 by its own gravity, thereby increasing the flow rate of the molten metal and preventing the molten metal from flowing too slowly, which makes the appearance of the casting fleshy.
[0046] Specifically, there are three ingates 14. The sum of the cross-sectional areas of the three ingates 14 is greater than the cross-sectional area of the cross-flow section 132. The size of the cross-sectional area of the ingates 14 allows the molten metal to be diverted to the three ingates 14, and the cross-sectional areas of the three ingates 14 allow the molten metal to flow in quickly and smoothly, thereby avoiding the appearance of the casting being too fleshy, improving the manufacturing efficiency of the casting, and improving the quality of the casting.
[0047] Specifically in this embodiment, the cross-sectional area S of the sprue 12, the area S of the flow blocking section 15, the cross-sectional area S of the cross-flow section 132, and the cross-sectional area S of the ingrate 14 are proportionally related to each other as follows:
[0048] Svertical: Sresistance: Shortitudinal: Sinner = (2-2.5):1:(1.3-1.5):(1.7-2.0).
[0049] According to the above-mentioned area ratio, the flow blocking section 15 is located at the overlapped connection between the sprue 12 and the runner 13, and the cross-sectional area of the overlapped section 131 of the runner 13 is 2.0-2.6, which increases the cross-sectional area of the runner to prevent the metal liquid from flowing fast and washing the runner 13, causing sand particles to enter the mold cavity 11 with the metal liquid to form dense sand holes on the appearance of the casting. In addition, the sum of the cross-sectional areas of the entgate 14 is greater than the cross-sectional area of the cross-flow section 132, which can avoid making the appearance of the casting fleshy, and workers do not need to further polish, thereby improving the production efficiency of the brake drum casting system.
[0050] The above embodiments are merely exemplary descriptions of the structures. The structures in the embodiments are not fixed combination structures. In the absence of structural conflicts, the structures in multiple embodiments can be used in any combination.
[0051] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.
Claims
1. A brake drum casting system, characterized in that: include: a cavity for forming a brake drum; A sprue, one end of which is an inlet end, and the inlet end is used to receive the molten metal; A horizontal runner is arranged around the outside of the cavity, and the horizontal runner includes an overlapping section and a cross-flow section that are connected to each other, the overlapping section is connected to the other end of the straight runner, the connecting surface between the overlapping section and the straight runner is a flow-blocking section, and the cross-flow section extends along the circumference of the cavity; An ingrate, one end of which is disposed on a side of the cross flow section close to the brake drum and extends toward the mold cavity, the ingrate being in communication with the mold cavity; Wherein, the cross-sectional area of the overlapping section is larger than the flow-blocking cross-sectional area, and the flow-blocking cross-sectional area is smaller than the cross-sectional area of the cross-flow section.
2. The brake drum casting system according to claim 1, characterized in that: The cross-sectional area of the cross-flow section is smaller than the cross-sectional area of the ingrowth.
3. The brake drum casting system according to claim 1, characterized in that: The cross-sectional area of the overlapping section is larger than the cross-sectional area of the cross-flow section.
4. The brake drum casting system according to claim 1, characterized in that: The cross-sectional area of the sprue is greater than the flow-blocking cross-sectional area.
5. The brake drum casting system according to claim 1, characterized in that: The cross-sectional area of the overlapping section is 2.0-2.6 times the cross-sectional area of the flow-blocking section; the cross-sectional area of the overlapping section is 1.5-1.7 times the cross-sectional area of the cross-flow section.
6. The brake drum casting system according to claim 1, characterized in that: The cross-sectional area of the sprue is 2.0-2.5 times the cross-sectional area of the flow-blocking channel.
7. The brake drum casting system according to claim 1, characterized in that: The ingates include a plurality of ingates, which are sequentially arranged on the cross-flow section, and the sum of the cross-sectional areas of the plurality of ingates is greater than the cross-sectional area of the cross-flow section.
8. The brake drum casting system according to claim 1, characterized in that: The gate comprises three gates.
9. The brake drum casting system according to claim 1, characterized in that: The ingrate is in a step shape, one end of the ingrate is connected to the cross flow section, and the other end is bent downward and extended to be connected to the cavity.
10. The brake drum casting system according to claim 1, characterized in that: A filter block is arranged in the sprue, and a filter net is arranged in the filter block.