A salt core for casting brake caliper and a press mold for manufacturing the same

Abstract

The application discloses a salt core for brake caliper casting and a pressing die for manufacturing the same, relates to the technical field of salt cores for brake caliper casting, and discloses the pressing die for manufacturing the salt core, which comprises a base plate and a sealing die, a shell is fixed to the upper surface of the base plate, the outer wall of the sealing die is attached to the inner wall of the shell, a detachable device for uniformly filling material is arranged in the shell, a shaking device is arranged on the side of the detachable device, and a preheating device for preventing moisture absorption is arranged in the shell. When the salt core is cast, the mold is disassembled by the lower fixed mold, the upper auxiliary mold, the side fixed mold, the side auxiliary mold, the return spring and the movable mold when the salt core is taken out, so that the abrasion of the complex part caused by the excessive mutual friction with the mold is avoided, and the problem that the salt core is easily abraded when taken out is solved.

Description

Technical Field

[0001] This invention relates to the field of salt core technology for brake caliper casting, specifically to a salt core for brake caliper casting and a pressing mold for manufacturing it. Background Technology

[0002] Salt cores for brake caliper casting are water-soluble sacrificial cores used in die casting or sand casting of aluminum / magnesium alloy calipers to form complex cavities such as internal oil channels and pores. Their core function is to occupy the oil channel positions during casting. After the casting is formed, they are removed by water dissolution, forming a residue-free internal flow channel. They are a key process material for high-performance integrated calipers. Salt cores for brake calipers are mostly formed using inorganic salt-based materials through a pressing and sintering process. The pressing mold is the core equipment to ensure the dimensional accuracy, density uniformity, and mechanical strength of the salt core.

[0003] In the existing technology, the salt core pressing mold is usually composed of an upper mold, a lower mold and a simple ejection mechanism. It is mainly designed for salt cores with regular shapes such as piston internal cooling oil passages. However, brake caliper salt cores have irregular structural features such as multi-branch, variable cross-section and local narrowness. When adapting to the production of such irregular salt cores, traditional pressing molds not only have difficulty in ensuring the uniformity of salt core density, but also easily cause difficulty in demolding or wear during removal due to the complex structure. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a salt core for casting brake calipers and a pressing mold for manufacturing the same, thus solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pressing mold for manufacturing salt cores, comprising a chassis and a sealing mold, wherein a shell is fixed to the upper surface of the chassis, the outer wall of the sealing mold is fitted to the inner wall of the shell, a disassembly device for uniform filling is provided inside the shell, a vibration device is provided on the side of the disassembly device, a preheating device for preventing moisture absorption is provided inside the shell, a top rod is fixed to the bottom surface of the sealing mold, and a filling hole is provided on the upper surface of the disassembly device; The detachable device includes a lower fixed mold, an upper auxiliary mold, a side fixed mold, a side auxiliary mold, an operating rod, a top block, a return spring, and a movable mold. The lower fixed mold is fixedly connected to the bottom surface of the inner wall of the housing. The bottom surface of the upper auxiliary mold is in contact with the upper surface of the lower fixed mold. The side fixed mold is fixedly connected to the bottom surface of the inner wall of the housing.

[0006] According to the above technical solution, the side wall of the side fixed mold is fixedly connected to the side wall of the lower fixed mold, the side auxiliary mold is slidably connected to the side wall of the inner wall of the housing, the bottom surface of the side auxiliary mold is slidably connected to the upper surface of the side fixed mold, and the operating rod is fixedly connected to the side wall of the side auxiliary mold.

[0007] According to the above technical solution, the rod penetrates the side wall of the housing and is slidably connected at the penetration point. The top block is fixedly connected to the upper surface of the side fixed mold. One end of the return spring is fixedly connected to the inner wall of the side auxiliary mold. The movable mold is fixedly connected to the other end of the return spring. The movable mold is slidably connected to the inner wall of the side auxiliary mold.

[0008] According to the above technical solution, the oscillating device includes a sliding block, a protrusion, a guide rod, a connecting block, a return spring, an impact rod, a sliding rod, and a serrated extrusion block. The sliding block is slidably connected to the side wall of the lower fixed mold, and the protrusion is fixedly connected to the side wall of the sliding block.

[0009] According to the above technical solution, the guide rod is fixedly connected to the side wall of the protrusion, the guide rod passes through the connecting block and is slidably connected at the point of penetration, the connecting block is slidably connected to the side wall of the sliding block, the return spring is fixedly connected to the side wall of the protrusion, and the end of the return spring away from the protrusion is fixedly connected to the side wall of the connecting block.

[0010] According to the above technical solution, the impact rod is fixedly connected to the side wall of the connecting block away from the reset spring, the sliding rod is fixedly connected to the side wall of the connecting block, the serrated extrusion block is fixedly connected to the side wall of the lower fixed mold, and the outer wall of the sliding rod is slidably connected to the outer wall of the serrated extrusion block.

[0011] According to the above technical solution, the preheating device includes a heating box, a gas storage chamber, a one-way exhaust valve pipe, a one-way intake valve pipe, a push rod, a pressing plate, a limiting plate, and a trapezoidal block. The heating box is fixedly connected to the side wall of the inner wall of the shell. The gas storage chamber is opened in the inner wall of the shell and communicates with the heating box. The one-way exhaust valve pipe is fixedly connected to the side wall of the heating box. The one-way exhaust valve pipe can only allow airflow to flow into the shell through the gas storage chamber and the heating box.

[0012] According to the above technical solution, the one-way air intake valve pipe is fixedly connected to the outer wall of the housing. The one-way air intake valve pipe can only allow airflow from the outside to the air storage chamber and the interior of the heating box. The push rod passes through the upper surface of the heating box and is slidably connected at the penetration point. The extrusion plate is fixedly connected to the bottom surface of the push rod. The outer wall of the extrusion plate is in contact with the inner wall of the air storage chamber and the heating box. The limiting plate is fixedly connected to the upper surface of the push rod. The trapezoidal block is fixedly connected to the bottom surface of the limiting plate.

[0013] The present invention also proposes a salt core for casting brake calipers, the salt core consisting of a rectangular frame composed of four round rods, two horizontal cylindrical shafts, eight cylindrical sleeves, and a rectangular vertical plate with a notch.

[0014] This invention provides a salt core for casting brake calipers and a pressing mold for manufacturing it. It has the following beneficial effects: 1. This invention features a detachable device. During the casting of the salt core, the mold is disassembled by a lower fixed mold, an upper auxiliary mold, a side fixed mold, a side auxiliary mold, a return spring, and a movable mold when the salt core is removed. This avoids excessive friction between the complex parts and the mold, preventing wear and tear, and solving the problem of wear during salt core removal. During filling the mold, the side auxiliary mold, operating rod, top block, return spring, and movable mold work together to collect the spilled filler salt and push it back into the mold for pre-pressing and final pressing. This avoids incomplete filling and uneven density caused by excessive flow distance of the filler salt in the mold during one-time molding. Furthermore, the filler salt in the mold is leveled during the pre-pressing process, resulting in a more uniform distribution, thus solving the problem of uneven filler distribution during salt core casting.

[0015] 2. This invention incorporates a vibration device. During the pre-pressing of the salt core, a sliding block, a protrusion, a guide rod, a connecting block, a return spring, an impact rod, a sliding rod, and a serrated extrusion block collide with the lower fixed mold and the side fixed mold. This vibrates and flattens the filling salt within the lower and side fixed molds, preventing uneven density of the filling salt and thus avoiding uneven density of the cast salt core. This solves the problem of quality degradation caused by uneven filling salt density during salt core production. When removing the salt core, the vibration device strikes the mold, causing the salt core to shake within the mold's groove. This creates a gap between the outer wall of the salt core and the mold, making it easier to remove the salt core. This prevents the outer wall from sticking to the mold during removal, thus solving the problem of damage caused by adhesion during salt core removal.

[0016] 3. The present invention is equipped with a preheating device. After the salt core casting is completed, it is used in conjunction with a heating box, a gas storage chamber, a one-way exhaust valve pipe, a one-way intake valve pipe, a push rod, an extrusion plate, a limiting plate, and a trapezoidal block to preheat the salt core. This ensures that the salt core has a certain temperature when it is taken out, so that it can be directly cast, avoiding moisture absorption and solving the problem that the salt core is prone to moisture absorption during the process from taking it out to casting. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention during operation; Figure 2 This is a schematic diagram of the structure of the invention when it is completely stopped working; Figure 3 This is a schematic diagram of the full cross-section of the present invention; Figure 4 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 5 This is a schematic diagram of the pre-compression mold structure of the present invention; Figure 6 This is a schematic diagram of the partially detachable device and preheating device of the present invention; Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure of region A; Figure 8 For the present invention Figure 6 A magnified schematic diagram of the structure of region B; Figure 9 This is a schematic diagram of the partially detachable device structure of the present invention; Figure 10 This is a schematic diagram of the salt core structure of the present invention.

[0018] In the diagram: 1. Chassis; 2. Shell; 3. Sealing mold; 41. Lower fixed mold; 42. Upper auxiliary mold; 43. Side fixed mold; 44. Side auxiliary mold; 45. Operating lever; 46. Top block; 47. Return spring; 48. Movable mold; 51. Sliding block; 52. Protrusion; 53. Guide rod; 54. Connecting block; 55. Return spring; 56. Impact rod; 57. Sliding rod; 58. Serrated extrusion block; 61. Heating box; 62. Air storage chamber; 63. One-way exhaust valve pipe; 64. One-way intake valve pipe; 65. Push rod; 66. Extrusion plate; 67. Limiting plate; 68. Trapezoidal block; 7. Top rod; 8. Packing hole; 9. Salt core. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-10 One embodiment of the present invention is: a pressing mold for salt core manufacturing, including a base plate 1 and a sealing mold 3. A shell 2 is fixed on the upper surface of the base plate 1. The outer wall of the sealing mold 3 is attached to the inner wall of the shell 2. The base plate 1 is fixed on a horizontal plane, so that the shell 2 is fixed and stationary. After filling is completed, the sealing mold 3 is pressed down against the inner wall of the shell 2. A disassembly device for uniform filling is provided inside the shell 2. A push rod 7 is fixed on the bottom surface of the sealing mold 3. A filling hole 8 is opened on the upper surface of the disassembly device, so that the push rod 7 is inserted into its corresponding filling hole 8 to compress the filling.

[0021] The detachable device includes a lower fixed mold 41, an upper auxiliary mold 42, a side fixed mold 43, a side auxiliary mold 44, an operating lever 45, a top block 46, a return spring 47, and a movable mold 48. The lower fixed mold 41 is fixedly connected to the bottom surface of the inner wall of the housing 2. The bottom surface of the upper auxiliary mold 42 is attached to the upper surface of the lower fixed mold 41. The side wall of the upper auxiliary mold 42 is pressed downward against the inner wall of the lower fixed mold 41 until the bottom surface of the upper auxiliary mold 42 is attached to the upper surface of the lower fixed mold 41. The fixed mold 43 is fixedly connected to the bottom surface of the inner wall of the housing 2. The side wall of the side fixed mold 43 is fixedly connected to the side wall of the lower fixed mold 41. After the housing 2 is fixed, filler salt is poured into the lower fixed mold 41 and the side fixed mold 43 respectively. The filler salt is used to fill the inner grooves of the lower fixed mold 41 and the side fixed mold 43. The side auxiliary mold 44 is slidably connected to the side wall of the inner wall of the housing 2. The bottom surface of the side auxiliary mold 44 is slidably connected to the upper surface of the side fixed mold 43. The operating rod 45 is fixedly connected to the side auxiliary mold. The operating rod 45 penetrates the side wall of the housing 2 and is slidably connected at the penetration point. Pushing the operating rod 45 downwards towards the fixed mold 41 causes the side auxiliary mold 44 to slide on the upper surface of the upper auxiliary mold 42, pushing the filler salt spilled from the upper surface of the upper auxiliary mold 42 into the groove of the upper auxiliary mold 42, and leveling the salt filling the groove inside the upper auxiliary mold 42. The top block 46 is fixedly connected to the upper surface of the side fixed mold 43 and returns to its original position. One end of the spring 47 is fixedly connected to the inner wall of the side auxiliary mold 44, and the movable mold 48 is fixedly connected to the other end of the return spring 47. The movable mold 48 is slidably connected to the inner wall of the side auxiliary mold 44. When the side auxiliary mold 44 slides, it also drives the return spring 47 and the movable mold 48 to move. When the movable mold 48 moves to the top block 46 along with the upper auxiliary mold 42, the top block 46 pushes the movable mold 48 to slide towards the center of the side auxiliary mold 44, pushing the filler salt at the edge towards the groove for shaping.

[0022] When the side auxiliary mold 44 slides to fit against the side wall of the lower fixed mold 41, salt continues to be filled into the filling hole 8. After filling, the push rod 7 is aligned and inserted into the inside of the filling hole 8, and the sealing mold 3 is pressed down to perform final shaping of the salt core, so that the salt core 9 is completed. When casting the salt core 9, this disassembly device disassembles the mold through the lower fixed mold 41, upper auxiliary mold 42, side fixed mold 43, side auxiliary mold 44, return spring 47 and movable mold 48 when the salt core 9 is taken out, avoiding excessive friction between the complex parts and the mold, which leads to wear and solves the problem that the salt core 9 is prone to wear when it is taken out. When filling the mold, the auxiliary mold 44, operating rod 45, top block 46, return spring 47 and movable mold 48 are used to collect the filler salt that spills out of the tank and push it into the tank for pre-pressing. This process avoids incomplete filling and uneven density caused by the filler salt flowing too far in the tank during one-time molding. In addition, the filler salt in the tank is scraped flat during the pre-pressing process, making the filler salt distribution more uniform. This solves the problem of uneven filler distribution that easily occurs during the casting of salt core 9.

[0023] In this embodiment, the chassis 1 is fixed on a horizontal surface, and the housing 2 is fixed and stationary. After the filling is completed, the sealing mold 3 is pressed down against the inner wall of the housing 2, and the push rods 7 are inserted into their corresponding filling holes 8 to squeeze the filling.

[0024] After fixing the housing 2, pour filler salt into the lower fixing mold 41 and the side fixing mold 43 respectively. After filling the inner grooves of the lower fixing mold 41 and the side fixing mold 43 with filler salt, press the side wall of the upper auxiliary mold 42 against the inner wall of the lower fixing mold 41 downwards until the bottom surface of the upper auxiliary mold 42 is against the upper surface of the lower fixing mold 41. Push the operating rod 45 in the direction of the lower fixing mold 41. When the operating rod 45 slides in the direction of the lower fixing mold 41, it also pushes the side auxiliary mold 44. The upper auxiliary mold 42 slides on its upper surface, pushing the filler salt that has spilled out of the groove onto the upper auxiliary mold 42 into the groove of the upper auxiliary mold 42, and smoothing the salt filling the groove inside the upper auxiliary mold 42. When the side auxiliary mold 44 slides, it also drives the return spring 47 and the movable mold 48 to move. When the movable mold 48 moves with the upper auxiliary mold 42 to the top block 46, the inclined surface of the top block 46 slides against the side of the movable mold 48, and the top block 46 pushes the movable mold 48 to the side. The auxiliary mold 44 slides in the center direction, pushing the filler salt at the edge towards the groove for shaping. When the movable mold 48 slides towards the center direction of the side auxiliary mold 44, it stretches the return spring 47. When the side auxiliary mold 44 slides to fit against the side wall of the lower fixed mold 41, salt continues to be filled into the filler hole 8. After filling, the push rod 7 is aligned and inserted into the inside of the filler hole 8, and the sealing mold 3 is pressed down to perform the final shaping of the salt core. After casting is completed, when it is necessary to remove the salt core, the sealing mold 3 is removed, and the two sets of operating rods 45 are pulled away from the lower fixed mold 41. The operating rods 45 drive the side auxiliary mold 44 to slide away from the lower fixed mold 41. When the side auxiliary mold 44 slides away from the lower fixed mold 41, the movable mold 48 disengages from the top block 46 and slides away from the salt core 9 due to the restoring force of the return spring 47. This allows the mold to disengage from the salt core 9 more quickly and exposes both sides of the salt core 9. The side fixed mold 43 is then lifted up to remove the salt core 9 completely.

[0025] Among them, the salt core 9 consists of a rectangular frame composed of four round rods, two horizontal cylindrical shafts, eight cylindrical sleeves, and a rectangular vertical plate with a notch.

[0026] Please see Figures 1-10 Based on the above embodiments, in another embodiment of the present invention, a vibration device is provided on the side of the detachable device. The vibration device includes a sliding block 51, a protrusion 52, a guide rod 53, a connecting block 54, a return spring 55, an impact rod 56, a sliding rod 57, and a serrated extrusion block 58. The sliding block 51 is slidably connected to the side wall of the lower fixed mold 41. When the side auxiliary mold 44 slides down the direction of the lower fixed mold 41 to the sliding block 51, the side auxiliary mold 44 pushes the sliding block 51 upward to slide. The protrusion 52 is fixedly connected to the side wall of the sliding block 51, and the guide rod 53 is fixedly connected to the side wall of the lower fixed mold 41. The guide rod 53 passes through the connecting block 54 on the side wall of the protrusion 52 and is slidably connected at the point of penetration. The connecting block 54 is slidably connected to the side wall of the sliding block 51. The return spring 55 is fixedly connected to the side wall of the protrusion 52, and the end of the return spring 55 away from the protrusion 52 is fixedly connected to the side wall of the connecting block 54. The impact rod 56 is fixedly connected to the side wall of the connecting block 54 away from the return spring 55. When the sliding block 51 slides towards the protrusion 52, it compresses the return spring 55. The sliding of the connecting block 54 causes the impact rod 56 to disengage from the lower fixed mold 41. The sliding rod 57 is fixedly connected to the connecting block 54. The serrated extrusion block 58 is fixedly connected to the side wall of the lower fixed mold 41. The outer wall of the sliding rod 57 is slidably connected to the outer wall of the serrated extrusion block 58. When the serrated extrusion block 58 slides upward, it also slides along the outer wall of the sliding rod 57. When the connecting block 54 continues to slide upward with the serrated extrusion block 58, the serrated extrusion block 58 slides until it disengages from the protrusion of the sliding rod 57. At this time, the connecting block 54 is pushed downward towards the lower fixed mold 41 by the restoring force of the return spring 55. The connecting block 54 drives the impact rod 56 to impact the lower fixed mold 41, causing the lower fixed mold to... The oscillation device, when pre-pressing the salt core 9, works with the sliding block 51, protrusion 52, guide rod 53, connecting block 54, return spring 55, impact rod 56, sliding rod 57, and serrated extrusion block 58 to impact the lower fixed mold 41 and the side fixed mold 43, causing the filling salt in the lower fixed mold 41 and the side fixed mold 43 to vibrate and flatten. This avoids uneven density of the filling salt in the lower fixed mold 41 and the side fixed mold 43, which leads to uneven density of the cast salt core 9. This solves the problem that the quality of the salt core 9 is easily reduced due to uneven density of the filling salt during production. When removing the salt core 9, the mold is struck by a vibration device, causing the salt core 9 to shake within the mold's groove. This creates a gap between the outer wall of the salt core 9 and the mold, making it easier to remove the salt core 9. This avoids the outer wall of the salt core 9 sticking to the mold during removal, preventing damage caused by forced removal. This solves the problem of the salt core 9 being easily damaged due to sticking when it is removed.

[0027] The interior of the housing 2 is equipped with a preheating device to prevent moisture absorption. This preheating device includes a heating chamber 61, an air storage chamber 62, a one-way exhaust valve pipe 63, a one-way intake valve pipe 64, a push rod 65, a pressing plate 66, a limiting plate 67, and a trapezoidal block 68. The heating chamber 61 is fixedly connected to the side wall of the inner wall of the housing 2. The air storage chamber 62 is located on the inner wall of the housing 2 and communicates with the heating chamber 61. The one-way exhaust valve pipe 63 is fixedly connected to the side wall of the heating chamber 61, and the one-way intake valve pipe 64 is fixedly connected to the outer wall of the housing 2. The push rod 65 passes through the heating chamber. The upper surface of the box 61 is slidably connected through the passage. The extrusion plate 66 is fixedly connected to the bottom surface of the push rod 65. The outer wall of the extrusion plate 66 is in contact with the inner wall of the air storage chamber 62 and the heating box 61. When the extrusion plate 66 slides downward, air enters the air storage chamber 62 from the one-way air inlet valve pipe 64, and then passes through the heating box 61 for heating. The limiting plate 67 is fixedly connected to the upper surface of the push rod 65. When the sealing mold 3 slides downward, it pushes the limiting plate 67 to slide downward as well. When the limiting plate 67 slides downward, it drives the push rod 65 and the extrusion plate 66 to slide downward. The trapezoidal block 68 is fixedly connected to the bottom surface of the limiting plate 67. When casting is completed, the operating rod 45 is pulled away from the lower fixed mold 41. When the side auxiliary mold 44 slides to the trapezoidal block 68 with the operating rod 45, the side auxiliary mold 44 pushes the trapezoidal block 68 to slide upward. When the trapezoidal block 68 slides upward, it pushes the limiting plate 67 to slide upward as well. The limiting plate 67 drives the push rod 65 and the extrusion plate 66 to slide upward. The extrusion plate 66 compresses the air in the air storage chamber 62, causing the heating box 61 and the storage chamber 62 to move upward. The heated air in the air chamber 62 is sprayed onto the salt core 9 through the one-way exhaust valve pipe 63 to preheat the salt core 9. After the salt core 9 is cast, this preheating device, together with the heating box 61, air storage chamber 62, one-way exhaust valve pipe 63, one-way air inlet valve pipe 64, push rod 65, extrusion plate 66, limiting plate 67 and trapezoidal block 68, preheats the salt core 9, so that the salt core 9 has a certain temperature when it is taken out, and can be directly cast, avoiding moisture absorption. This solves the problem that the salt core 9 is prone to moisture absorption during the process from taking it out to casting.

[0028] In this embodiment, when the side auxiliary mold 44 slides downward toward the fixed mold 41 to the sliding block 51, the side of the side auxiliary mold 44 slides against the inclined surface of the sliding block 51. The side auxiliary mold 44 pushes the sliding block 51 upward. When the sliding block 51 slides upward, it drives the protrusion 52, guide rod 53, connecting block 54, return spring 55, impact rod 56, and serrated extrusion block 58 to slide upward. The outer wall of the serrated extrusion block 58 is slidably connected to the outer wall of the sliding rod 57. When the serrated extrusion block 58 slides upward, it also slides along the outer wall of the sliding rod 57. When the serrated extrusion block 58 slides along the outer wall of the sliding rod 57 toward the protrusion 52, it extrudes the return spring 55. The serrated extrusion block 58 drives the connecting block 54 to move away from the lower part of the guide rod 53. The connecting block 54 slides in the direction of the fixed mold 41, and the sliding block 54 drives the impact rod 56 to disengage from the lower fixed mold 41. As the connecting block 54 continues to slide upward with the serrated extrusion block 58, the serrated extrusion block 58 slides to the protrusion of the sliding rod 57. At this time, the connecting block 54 is pushed downward by the return spring 55 and slides in the direction of the lower fixed mold 41. The connecting block 54 drives the impact rod 56 to impact the lower fixed mold 41, causing the lower fixed mold 41 to vibrate and making the filling in the groove of the lower fixed mold 41 and the side fixed mold 43 uniform. When the casting is completed, when the side auxiliary mold 44 is pulled away from the lower fixed mold 41, the sliding block 51 is no longer pushed by the side auxiliary mold 44, and slides downward by its own gravity, striking the lower fixed mold 41 and creating a gap between the salt core 9 and the mold.

[0029] When the sealing mold 3 slides downward, the limiting plate 67 also slides downward. When the limiting plate 67 slides downward, it drives the push rod 65 and the extrusion plate 66 to slide downward. When the extrusion plate 66 slides downward, air enters the air storage chamber 62 from the one-way air inlet valve pipe 64 and is then heated by the heating box 61. When the casting is completed, the operating rod 45 is pulled away from the lower fixed mold 41. When the side auxiliary mold 44 slides to the trapezoidal block 68 with the operating rod 45, the side of the side auxiliary mold 44 slides against the inclined surface of the trapezoidal block 68. The side auxiliary mold 44 pushes the trapezoidal block 68 to slide upward. When the trapezoidal block 68 slides upward, it pushes the limiting plate 67 to slide upward. The limiting plate 67 drives the push rod 65 and the extrusion plate 66 to slide upward. The extrusion plate 66 compresses the air in the air storage chamber 62, causing the heated air in the heating box 61 and the air storage chamber 62 to be sprayed from the one-way exhaust valve pipe 63 onto the salt core 9 to preheat the salt core 9.

[0030] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressing mold for manufacturing salt cores, comprising a base (1) and a sealing mold (3), characterized in that: The upper surface of the chassis (1) is fixed with a shell (2), the outer wall of the sealing mold (3) is attached to the inner wall of the shell (2), the shell (2) is provided with a disassembly device for uniform filling, the side of the disassembly device is provided with a vibration device, the bottom surface of the sealing mold (3) is fixed with a top rod (7), and the upper surface of the disassembly device is provided with a filling hole (8). The detachable device includes a lower fixed mold (41), an upper auxiliary mold (42), a side fixed mold (43), a side auxiliary mold (44), an operating rod (45), a top block (46), a return spring (47), and a movable mold (48). The lower fixed mold (41) is fixedly connected to the bottom surface of the inner wall of the housing (2). The bottom surface of the upper auxiliary mold (42) is in contact with the upper surface of the lower fixed mold (41). The side fixed mold (43) is fixedly connected to the bottom surface of the inner wall of the housing (2).

2. The pressing mold for salt core manufacturing according to claim 1, characterized in that: The side wall of the side fixed mold (43) is fixedly connected to the side wall of the lower fixed mold (41), the side auxiliary mold (44) is slidably connected to the side wall of the inner wall of the housing (2), the bottom surface of the side auxiliary mold (44) is slidably connected to the upper surface of the side fixed mold (43), and the operating rod (45) is fixedly connected to the side wall of the side auxiliary mold (44).

3. The pressing mold for salt core manufacturing according to claim 2, characterized in that: The operating lever (45) passes through the side wall of the housing (2) and is slidably connected at the point of penetration. The top block (46) is fixedly connected to the upper surface of the side fixed mold (43). One end of the return spring (47) is fixedly connected to the inner wall of the side auxiliary mold (44). The movable mold (48) is fixedly connected to the other end of the return spring (47). The movable mold (48) is slidably connected to the inner wall of the side auxiliary mold (44).

4. The pressing mold for salt core manufacturing according to claim 1, characterized in that: The oscillation device includes a sliding block (51), a protrusion (52), a guide rod (53), a connecting block (54), a reset spring (55), an impact rod (56), a sliding rod (57), and a serrated extrusion block (58). The sliding block (51) is slidably connected to the side wall of the lower fixed mold (41), and the protrusion (52) is fixedly connected to the side wall of the sliding block (51).

5. A pressing mold for manufacturing salt cores according to claim 4, characterized in that: The guide rod (53) is fixedly connected to the side wall of the protrusion (52). The guide rod (53) passes through the connecting block (54) and is slidably connected at the point of penetration. The connecting block (54) is slidably connected to the side wall of the sliding block (51). The reset spring (55) is fixedly connected to the side wall of the protrusion (52). The end of the reset spring (55) away from the protrusion (52) is fixedly connected to the side wall of the connecting block (54).

6. A pressing mold for salt core manufacturing according to claim 5, characterized in that: The impact rod (56) is fixedly connected to the side wall of the connecting block (54) away from the return spring (55), the sliding rod (57) is fixedly connected to the side wall of the connecting block (54), the serrated extrusion block (58) is fixedly connected to the side wall of the lower fixed mold (41), and the outer wall of the sliding rod (57) is slidably connected to the outer wall of the serrated extrusion block (58).

7. A pressing mold for manufacturing salt cores according to claim 1, characterized in that: The interior of the housing (2) is provided with a preheating device to prevent moisture absorption. The preheating device includes a heating box (61), an air storage chamber (62), a one-way exhaust valve pipe (63), a one-way air intake valve pipe (64), a push rod (65), an extrusion plate (66), a limiting plate (67), and a trapezoidal block (68). The heating box (61) is fixedly connected to the side wall of the inner wall of the housing (2). The air storage chamber (62) is opened on the inner wall of the housing (2) and is connected to the heating box (61). The one-way exhaust valve pipe (63) is fixedly connected to the side wall of the heating box (61).

8. A pressing mold for manufacturing salt cores according to claim 7, characterized in that: The one-way air intake valve pipe (64) is fixedly connected to the outer wall of the housing (2). The push rod (65) penetrates the upper surface of the heating box (61) and is slidably connected at the penetration point. The extrusion plate (66) is fixedly connected to the bottom surface of the push rod (65). The outer wall of the extrusion plate (66) is in contact with the inner wall of the air storage chamber (62) and the heating box (61). The limiting plate (67) is fixedly connected to the upper surface of the push rod (65). The trapezoidal block (68) is fixedly connected to the bottom surface of the limiting plate (67).

9. A salt core for casting brake calipers, characterized in that: The salt core (9) is manufactured by the pressing mold according to any one of claims 1-8, and the salt core (9) consists of a rectangular frame composed of four round rods, two horizontal cylindrical shafts, eight cylindrical sleeves and a rectangular upright plate with a notch.

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