A taper-sided pouring type mold for casting an automobile brake cylinder

Abstract

The utility model is suitable for the technical field of automobile brake, provides a kind of automobile brake cylinder body casting uses conical side face pouring type mould, including mould frame, the mould frame includes the horizontal setting fixed mould frame and movable mould frame, the fixed mould frame inside is close to movable mould frame one side and is provided with fixed mould, the movable mould frame inside is close to fixed mould frame one side and is provided with movable mould;The fixed mould is set to quadrangle structure, and its close movable mould one side is provided with fixed mould cooperation groove, the movable mould is set to quadrangle structure, and shape is adapted with fixed mould, and the movable mould top is close to fixed mould one side end and is provided with material handle shunt cone.This device solves the problem that the uneven flow rate of the metal liquid generated in the one-piece inner gate encounters collision and generates eddy current, which increases the internal stress of the metal liquid, ultimately affects the uniformity of the finished product, achieves pouring from the conical runner side, uniformly distributes the metal liquid to reduce the internal stress, improves the uniformity of the finished product, and facilitates subsequent removal of the gate.

Description

Technical Field

[0001] This utility model relates to the field of automotive brake technology, and more specifically, it relates to a conical side-gating mold for casting automotive brake cylinder blocks. Background Technology

[0002] The automotive brake plays a braking and restraining role in the transmission. As an important component of the brake, the brake cylinder can transmit braking torque to the brake drum, thereby clamping the brake drum. After the brake drum is clamped, it can brake a certain component of the planetary gear, thus changing the transmission ratio.

[0003] In the production of automotive brake cylinders, molten metal is poured into a mold and cooled to form the cylinder, ensuring its structure meets design requirements. The quality of the finished brake cylinder is greatly influenced by the flow pattern of the molten metal after entering the mold cavity, which is determined by the form of the runner and ingate.

[0004] The most commonly used casting mold types are fan-shaped runners and conical runners. Fan-shaped runners have a narrower flow front in the cavity, a higher flow velocity at the center, and lower flow velocities on the sides, making them more suitable for deep cavity filling and die-casting round castings. Conical runners, on the other hand, have a wider flow front in the cavity, a gentler flow velocity at the center, and higher flow velocities on the sides, making them suitable for filling large flat surfaces and thus more appropriate for casting brake cylinder blocks.

[0005] To reduce production costs, most existing sprue molds use a one-piece ingate. However, the one-piece ingate structure is relatively wide, which can easily lead to uneven flow velocity in the center and slower flow velocity on both sides after the molten metal enters the cavity. The eddies generated by the collision of different flow velocities further increase the internal stress of the molten metal, ultimately causing the uniformity of the finished product to fail to meet the design requirements and affecting the quality of the finished product. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a conical side-gating mold for casting automotive brake cylinder blocks, which allows for side-gating from a conical runner, casting through a one-piece ingate, facilitating easy processing and removal of the gate, while also enabling uniform distribution of molten metal, reducing stress, and improving the quality of the finished product.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A conical side-gating mold for casting automotive brake cylinder blocks includes a mold frame, which comprises a horizontally arranged fixed mold frame and a moving mold frame. A fixed mold is disposed inside the fixed mold frame near the moving mold frame, and a moving mold is disposed inside the moving mold frame near the fixed mold frame. The fixed mold is configured with a rectangular structure and has a fixed mold mating groove on its side near the moving mold. The moving mold is configured with a rectangular structure and its shape is adapted to the fixed mold. A material stalk diverting cone is disposed at the top end of the moving mold near the fixed mold.

[0009] The present invention is further configured such that: the fixed mold frame and the moving mold frame are rectangular structures with mutually adapted shapes; a sprue sleeve is provided at the end of the fixed mold frame; water collection blocks are provided on the side walls of both the fixed mold frame and the moving mold frame; the interior of the water collection blocks is connected to the fixed mold frame and the moving mold frame respectively; wherein, the sprue sleeve is a cylindrical structure with a casting gate penetrating through its center; and a positioning plane is provided on the edge of the sprue sleeve.

[0010] The present invention is further configured such that: a set of fixed mold positioning blocks are provided at each of the four corners of the fixed mold near the moving mold; the fixed mold mating groove is coaxially arranged with the center of the fixed mold; the fixed mold mating groove is configured as a ring structure and is adapted to the moving mold on the side near the moving mold.

[0011] The present invention is further configured such that: a set of moving mold positioning grooves are provided at the four corners of the moving mold near the fixed mold side, the shape and size of the moving mold positioning grooves are adapted to the fixed mold positioning blocks, a sprue is provided at the top of the moving mold positioning groove near the sprue sleeve, a sprue mandrel is provided at the top of the sprue near the fixed mold side, the sprue mandrel is configured as a cylindrical structure, and a branch channel is provided near the sprue, one end of the branch channel is connected to the sprue sleeve, and the other end is connected to the sprue; wherein, the side wall shape of the sprue matches the sprue sleeve, and a horizontal sprue is connected at the end away from the sprue sleeve, the horizontal sprue is provided at the top of the moving mold near the moving mold side, and is symmetrically arranged about the axis of the moving mold, one end of the horizontal sprue is connected to the sprue, and the other end is connected to the ingate.

[0012] By adopting the above technical solution, both the sprue bushing and the sprue divider cone are set at the end of the fixed mold, thereby realizing the side pouring of molten metal. This facilitates processing and makes it easier to remove the remaining material in the runner and slag bag of the cast product.

[0013] The present invention is further configured as follows: the ingate is opened at the top of the moving mold positioning groove near the fixed mold side and multiple sets are opened around the direction of the horizontal runner. One end of each set of ingates is connected to the horizontal runner and the other end is connected to a casting ring groove. The casting ring groove is opened at the top of the moving mold near the fixed mold side and is coaxially arranged with the center of the moving mold. The size of the casting ring groove is adapted to the fixed mold mating groove, and the end away from the ingate is connected to a venting channel. A casting product can be formed inside the casting ring groove. The venting channel is opened at the top of the moving mold near the fixed mold side and multiple sets are opened around the edge of the casting ring groove. One end of each set of venting channels is connected to the casting ring groove and the other end extends to the edge of the moving mold. A set of slag pocket grooves is opened inside each set of venting channels near the casting ring groove side. The slag pocket grooves are configured as rectangular groove structures.

[0014] By adopting the above technical solution, the horizontal runner and the ingate form a conical runner, which distributes the molten metal more evenly from the side, effectively avoiding the formation of eddies due to the collision of uneven molten metal flow rates; the ingate fills the casting ring groove in sections, controls the direction of molten metal introduction, ensures consistent molten metal flow, and reduces the flow resistance of molten metal; it effectively improves the uneven molten metal flow caused by the one-piece ingate, reduces the stress during the molten metal flow process, and improves the quality of the finished product after molding.

[0015] The present invention is further configured such that: the cast product includes a product body with a circular ring structure, a runner material disposed at the edge of the circular ring of the product body near the sprue sleeve, and a slag bag material disposed at the edge of the circular ring of the product body away from the sprue sleeve; the product body, the runner material, and the slag bag material are integrally formed.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. The slurry sprue is set at the end of the fixed mold. During casting, the molten metal enters the moving mold from the casting port at the end of the fixed mold, and then gradually flows from the end of the moving mold to the center position, realizing the side pouring of the molten metal. This facilitates processing and makes it easier to remove the excess material in the runner and slag bag of the cast product.

[0018] 2. A horizontal runner is symmetrically opened at the top of the moving mold, and multiple sets of ingates are set around the horizontal runner. The horizontal runner and the ingates form a conical runner. During the flow of molten metal, the conical runner can distribute it more evenly from the side, effectively avoiding the formation of eddies due to uneven flow velocity of molten metal colliding with each other, thereby reducing the stress during the flow of molten metal and improving the quality of the finished product.

[0019] 3. During the casting process, the casting ring groove is filled in sections by multiple sets of ingates, thereby controlling the direction of molten metal introduction, ensuring consistent flow of molten metal, reducing flow resistance of molten metal, effectively improving the uniformity of molten metal flow caused by one-piece ingates, and further reducing stress during the flow of molten metal. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the conical side-gating mold for casting automotive brake cylinder blocks according to this utility model.

[0021] Figure 2 This is a schematic diagram of the fixed mold structure in this utility model.

[0022] Figure 3 This is a schematic diagram of the moving mold in this utility model.

[0023] Figure 4 This is a schematic diagram of the material stalk diverting cone in this utility model.

[0024] Figure 5 This is a schematic diagram of the structure of the sprue sleeve in this utility model.

[0025] Figure 6 This is a schematic diagram of the structure of the cast product in this utility model.

[0026] Explanation of reference numerals in the attached drawings: 1. Mold frame; 11. Fixed mold frame; 12. Moving mold frame; 13. Water collection block;

[0027] 2. Fixed mold; 21. Fixed mold positioning block; 22. Fixed mold mating groove;

[0028] 3. Moving mold; 31. Moving mold positioning groove; 32. Sprue divider cone; 33. Runner; 34. Straight sprue; 35. Horizontal sprue; 36. Ingate; 37. Casting ring groove; 38. Venting channel; 39. Slag trap;

[0029] 4. Sprue bushing; 41. Gating gate; 42. Positioning plane;

[0030] 5. Casting finished product; 51. Product body; 52. Residual material in the runner; 53. Residual material in the slag bag. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0033] Example 1, please refer to Figures 1-6 The present invention provides the following technical solution:

[0034] Specifically, it refers to a conical side-gating mold for casting automotive brake cylinder blocks, see reference. Figure 1 and Figure 6 The system includes a mold base 1, a fixed mold 2, a moving mold 3, a sprue bushing 4, and a cast product 5. The fixed mold base 11 and the moving mold base 12 are horizontally arranged and configured as rectangular structures of matching sizes, with the fixed mold base 11 located on top of the moving mold base 12. The fixed mold 2 is located inside the fixed mold base 11 near the moving mold base 12, and the moving mold 3 is located inside the moving mold base 12 near the fixed mold base 11. The fixed mold base 11 and the moving mold base 12 provide the installation environment for the fixed mold 2 and the moving mold 3, respectively, and also enable the fitting and separation of the fixed mold 2 and the moving mold 3. Water collection blocks 13 are provided on the side walls of both the fixed mold base 11 and the moving mold base 12. The water collection blocks 13 are connected to the fixed mold base 11 and the moving mold base 12, respectively. The water collection blocks 13 effectively control the flow rate and pressure during the injection molding process, ensuring stable and reliable product quality.

[0035] See Figure 1 and Figure 5 A sprue sleeve 4 is provided at the end of the fixed mold frame 11, and the sprue sleeve 4 is coaxially arranged with the end of the moving mold 3 in the vertical direction. The sprue sleeve 4 is a cylindrical structure with a casting gate 41 penetrating through its center, and a positioning plane 42 is provided on the edge of the sprue sleeve 4. Molten metal can enter the interior of the moving mold 3 through the casting gate 41, and the matching of the positioning plane 42 with the moving mold 3 facilitates the positioning of the sprue sleeve 4 and the moving mold 3.

[0036] See Figure 2 The fixed mold 2 includes a fixed mold positioning block 21 and a fixed mold mating groove 22. The fixed mold 2 is rectangular in shape, and the fixed mold mating groove 22 is provided on the side near the moving mold 3. The fixed mold mating groove 22 is coaxially arranged with the center of the fixed mold 2. The fixed mold mating groove 22 is annular in shape and is adapted to the moving mold 3 on the side near the moving mold 3. The fixed mold mating groove 22 can cooperate with the moving mold 3 to complete the shaping of the molten metal. A set of fixed mold positioning blocks 21 is provided at each of the four corners of the fixed mold 2 near the moving mold 3. The fixed mold positioning blocks 21 can fit into the moving mold 3, thereby ensuring that the fixed mold 2 and the moving mold 3 fit tightly and reliably.

[0037] See Figure 3 and Figure 4The moving mold 3 includes a moving mold positioning groove 31, a sprue divider cone 32, a runner 33, a sprue 34, a gating sprue 35, an ingate 36, a casting ring groove 37, a venting channel 38, and a slag trap 39. The moving mold 3 is a rectangular structure adapted to the fixed mold 2, allowing it to fit together and complete the injection molding of molten metal. A set of moving mold positioning grooves 31 are provided at each of the four corners of the moving mold 3 near the fixed mold 2. The shape and size of the moving mold positioning grooves 31 are adapted to the fixed mold positioning blocks 21. Through the fitting of the moving mold positioning grooves 31 and the fixed mold positioning blocks 21, the fixed mold 2 and the moving mold 3 can be positioned, completing their fitting together. A sprue 34 is provided at the top of the moving mold positioning groove 31 near the sprue sleeve 4, and the sidewall shape of the sprue 34 matches the sprue sleeve 4. A sprue divider cone 32 is provided at the top of the sprue 34 near the fixed mold 2. The sprue splitter cone 32 is cylindrical and has a splitter channel 33 on the side near the sprue 34. One end of the splitter channel 33 is connected to the sprue sleeve 4, and the other end is connected to the sprue 34. After the side wall of the sprue sleeve 4 is fitted with the side wall of the sprue 34, a complete flow channel can be formed between the casting port 41, the splitter channel 33, and the sprue 34. The molten metal can flow through the casting port 41 on the sprue sleeve 4, through the splitter channel 33, and into the interior of the sprue 34.

[0038] See Figure 3 and Figure 4 The sprue 34, located away from the sprue sleeve 4, is connected to a runner 35. The runner 35 is located on the top of the moving mold 3, near the moving mold 3, and is symmetrically positioned about the axis of the moving mold 3. One end of the runner 35 is connected to the sprue 34, and the other end is connected to an ingate 36. Multiple ingates 36 are located on the top of the moving mold positioning groove 31, near the fixed mold 2, and are arranged around the runner 35. Each ingate 36 is connected to the runner 35 on one end and to a casting ring groove 37 on the other. After entering the sprue 34, the molten metal is evenly distributed to each ingate 36 via the runner 35, and finally enters the casting ring groove 37 through the ingate 36 to complete the casting process. The casting ring groove 37 is located on the top of the moving mold 3, near the fixed mold 2, and is coaxially positioned with the center of the moving mold 3. The size of the casting ring groove 37 is adapted to the fixed mold mating groove 22. After the casting ring groove 37 and the fixed mold mating groove 22 are fitted together, a complete casting cavity can be formed, and the molten metal can form the casting product 5 inside it.

[0039] See Figure 3 and Figure 4The casting annular groove 37, away from the inner gate 36, is connected to an venting channel 38. Multiple venting channels 38 are located on the top of the moving mold 3, near the fixed mold 2, and surround the edge of the casting annular groove 37. Each venting channel 38 has one end connected to the casting annular groove 37 and the other end extending to the edge of the moving mold 3. Inside each venting channel 38, near the casting annular groove 37, is a slag trap 39, which is a rectangular groove structure. Hot air generated during casting is discharged through the venting channel 38, and excess molten metal enters the slag trap 39 through the venting channel 38 for cooling, effectively preventing excess molten metal waste from affecting the structure of the cast product 5 and ensuring the integrity and fullness of the cast product 5.

[0040] See Figure 6 The cast product 5 comprises a product body 51, runner residue 52, and slag pot residue 53, all of which are integrally formed. The product body 51 is a ring structure. The runner residue 52 is located at the edge of the ring of the product body 51 near the gating sleeve 4, while the slag pot residue 53 is located at the edge of the ring of the product body 51 away from the gating sleeve 4. The runner residue 52 is formed by cooling the molten metal inside the runner 33, sprue 34, gating system 35, and ingate 36. The slag pot residue 53 is formed by cooling the molten metal inside the venting channel 38 and slag pot trough 39.

[0041] The working principle of the conical side-gating mold for casting automotive brake cylinder blocks provided by this utility model is as follows:

[0042] See Figures 1-6 Before casting, the fixed mold 2 and the moving mold 3 are positioned and fitted by the cooperation of the fixed mold positioning block 21 and the moving mold positioning groove 31, so as to ensure that the internal space of the conical side pouring mold is fully sealed during the casting process and the molten metal will not overflow.

[0043] After the mold is assembled, the molten metal is poured from the casting gate 41, then flows through the runner 33 and into the sprue 34. The molten metal inside the sprue 34 flows into the grate 35, and is then evenly distributed to each ingate 36, finally entering the casting ring groove 37 through the ingate 36 to complete the casting process. The hot air generated during casting is discharged through the vent 38 on the other side of the casting ring groove 37, and excess molten metal flows through the vent 38 into the slag trap 39 to cool and solidify.

[0044] During casting, the molten metal enters the interior of the moving mold 3 from the casting port 41 at the end of the fixed mold 2, and gradually flows from the end of the moving mold 3 to the center position, realizing side casting. This facilitates processing and makes it easier to remove the runner residue 52 and slag residue 53 of the cast product 5.

[0045] The top of the moving mold 3 is composed of a symmetrically arranged horizontal sprue 35 and multiple sets of ingates 36 surrounding the horizontal sprue 35, forming a conical runner. This allows the molten metal inside the conical runner to be distributed more evenly laterally during flow, effectively preventing uneven flow velocity and collisions that could create eddies. This reduces stress during molten metal flow and improves the quality of the cast product 5. Simultaneously, the multiple sets of ingates 36 fill the casting annular groove 37 in sections, allowing control over the direction of molten metal introduction. This ensures consistent flow direction, reduces flow resistance, effectively improves the uneven flow caused by a one-piece ingate, and further reduces stress during molten metal flow.

[0046] The hot gas generated during casting can be discharged through the exhaust channel 38, thereby achieving rapid and uniform cooling of the molten metal. Excess molten metal enters the slag tank 39 for collection and cooling to form a solid shape, avoiding interference with the structural integrity of the cast product 5.

[0047] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. A conical side-gating mold for casting automotive brake cylinder blocks, characterized in that: The mold includes a mold frame (1), which includes a fixed mold frame (11) and a moving mold frame (12) arranged horizontally. A fixed mold (2) is provided inside the fixed mold frame (11) on the side close to the moving mold frame (12), and a moving mold (3) is provided inside the moving mold frame (12) on the side close to the fixed mold frame (11). The fixed mold (2) is configured as a rectangular structure and has a fixed mold mating groove (22) on the side near the moving mold (3). The moving mold (3) is configured as a rectangular structure and its shape is adapted to the fixed mold (2). The top end of the moving mold (3) near the fixed mold (2) is provided with a material stalk diverter cone (32).

2. The conical side-gating mold for casting automotive brake cylinder blocks according to claim 1, characterized in that: The fixed mold frame (11) and the moving mold frame (12) are configured as rectangular structures with mutually compatible shapes. The fixed mold frame (11) is provided with a sprue sleeve (4) at its end. The fixed mold frame (11) and the moving mold frame (12) are both provided with water collection blocks (13) on their side walls. The water collection blocks (13) are respectively connected to the fixed mold frame (11) and the moving mold frame (12). The gating sleeve (4) is configured as a cylindrical structure and has a casting port (41) through it at its center. The edge of the gating sleeve (4) is provided with a positioning plane (42).

3. The conical side-gating mold for casting automotive brake cylinder blocks according to claim 1, characterized in that: A set of fixed mold positioning blocks (21) are provided at each of the four corners of the fixed mold (2) near the moving mold (3). The fixed mold mating groove (22) is coaxially arranged with the center of the fixed mold (2). The fixed mold mating groove (22) is set as a ring structure and is adapted to the moving mold (3) on the side near the moving mold (3).

4. The conical side-gating mold for casting automotive brake cylinder blocks according to claim 3, characterized in that: The moving mold (3) has a set of moving mold positioning grooves (31) at each of the four corners on the side near the fixed mold (2). The shape and size of the moving mold positioning grooves (31) are adapted to the fixed mold positioning block (21). A sprue (34) is provided on the top of the moving mold positioning groove (31) near the sprue sleeve (4). A sprue cone (32) is provided on the top of the sprue (34) near the fixed mold (2). The sprue cone (32) is a cylindrical structure and a runner (33) is provided on the side near the sprue (34). One end of the runner (33) is connected to the sprue sleeve (4) and the other end is connected to the sprue (34). The side wall shape of the sprue (34) matches that of the sprue sleeve (4), and the end away from the sprue sleeve (4) is connected to the sprue (35). The sprue (35) is located on the top of the moving mold (3) near the moving mold (3) and is symmetrically arranged about the axis of the moving mold (3). One end of the sprue (35) is connected to the sprue (34), and the other end is connected to the ingate (36).

5. A conical side-gating mold for casting automotive brake cylinder blocks according to claim 4, characterized in that: The ingate (36) is located on the top of the moving mold positioning groove (31) near the fixed mold (2) and is provided in multiple sets around the horizontal runner (35). Each set of ingates (36) is connected to the horizontal runner (35) at one end and to a casting ring groove (37) at the other end. The casting ring groove (37) is located on the top of the moving mold (3) near the fixed mold (2) and is coaxially arranged with the center of the moving mold (3). The size of the casting ring groove (37) is adapted to the fixed mold fitting groove (22), and the end away from the ingate (36) is connected to an exhaust channel (38). The casting ring groove (37) can form a casting product (5). The exhaust channels (38) are opened on the top of the moving mold (3) near the fixed mold (2) and multiple sets are opened around the edge of the casting ring groove (37). One end of each set of exhaust channels (38) is connected to the casting ring groove (37) and the other end extends to the edge of the moving mold (3). A set of slag-filling grooves (39) are opened inside each set of exhaust channels (38) near the casting ring groove (37). The slag-filling grooves (39) are set as rectangular groove structures.

6. A conical side-gating mold for casting automotive brake cylinder blocks according to claim 5, characterized in that: The cast product (5) includes a product body (51) with a circular structure, a runner residue (52) located at the edge of the circular ring of the product body (51) near the sprue sleeve (4), and a slag bag residue (53) located at the edge of the circular ring of the product body (51) away from the sprue sleeve (4). The product body (51), the flow channel residue (52), and the slag bag residue (53) are integrally formed.

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