A core production mold for brake disc casting

Abstract

The present invention discloses a core production mold for brake disc casting, which relates to the technical field related to brake disc casting. Through the mutual cooperation between the movable casting core and the first arc groove on the lower mold and the second arc groove on the rotating ring, the upper mold and the lower mold are driven to fit together by a hydraulic cylinder, and the rotating ring is driven to rotate by a transmission mechanism. In this way, the movable casting core can be driven to be inserted into the mold cavity after the lower mold and the upper mold are completely fit together, thereby achieving the effect of automatic arrangement and positioning. At the same time, when the upper mold and the lower mold are separated after the pouring is completed, the movable casting core will automatically pop out of the mold cavity, which is convenient for the removal of the casting, reduces the arrangement and separation processes of the casting core, and greatly improves the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field related to brake disc casting, and in particular to a casting core production mold for brake disc casting. Background Art

[0002] The car brake disc is a key component in the car's braking system. It is also called the brake disc or brake rotor. It is the core component of the car's braking system. It stops the wheel from rotating by clamping with the brake caliper, thereby achieving the braking function and ensuring that the car can run safely and stably. Brake discs are made of a variety of materials, including gray cast iron, ceramics, carbon ceramics, resins, organic materials, etc. Among them, gray cast iron is the most common brake disc material with low cost and is suitable for most vehicles with daily driving needs.

[0003] The production of gray cast iron brake discs requires the use of a casting processing method. Casting has high production efficiency, which can greatly increase the production speed of brake discs and reduce production costs. At the same time, casting can also achieve large-scale production to meet the market's large demand for brake discs.

[0004] However, due to the special cavity heat dissipation structure of the brake disc, a large number of casting cores are required during casting to facilitate cavity formation. The casting cores need to be precisely arranged in place before casting, and they need to be removed one by one after casting. This is not only inefficient, but the casting cores may also deviate, resulting in uneven cavity wall thickness, which in turn affects production quality. Summary of the Invention

[0005] The object of the present invention is to provide a mold for producing a casting core for a brake disc casting, so as to solve the problem that the arrangement and removal of the casting core in the traditional brake disc casting is difficult as mentioned above.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a casting core production mold for brake disc casting, comprising a lower mold and an upper mold, the lower mold is fixedly mounted on the casting base, a hydraulic cylinder is fixedly mounted on the top of the casting base, the output end of the hydraulic cylinder is fixedly connected to a first lifting plate, four corners of the first lifting plate are penetrated by a support column, the lower end of the support column is fixedly connected to the second lifting plate, a buffer spring is provided on the outer sleeve of the support column, a molten steel injection mechanism is provided between the second lifting plate and the first lifting plate, a spring telescopic rod is provided on each side of the lower mold, the spring telescopic rod comprises a telescopic sleeve, the telescopic sleeve is fixedly connected to the casting base, a lifting pressure rod is inserted into the telescopic sleeve, the lifting pressure rod is slidably connected to the telescopic sleeve, a jacking spring is provided at the lower end of the lifting pressure rod, the lifting pressure rod penetrates the upper mold, and the upper mold is slidably connected to the lifting pressure rod, the upper end of the lifting pressure rod penetrates the second lifting plate, a reset spring is provided on the outer side of the lifting pressure rod, and the reset spring is located below the upper mold;

[0007] A spiral groove is provided on the outside of the lifting pressure rod, and a rotating slider is provided on the outer sleeve of the lifting pressure rod. The rotating slider is slidably connected to the spiral groove, and a driving gear is fixedly connected to the rotating slider. A telescopic groove is provided on the side of the mold cavity in the lower mold, and a movable casting core is provided in the telescopic groove. A first arc groove is provided around the mold cavity of the lower mold, and the movable casting core is slidably connected to the first arc groove. A rotating ring is rotatably connected around the lower mold, and the rotating ring is located above the movable casting core. A second arc groove is provided on the rotating ring, and the movable casting core is slidably connected to the second arc groove. A driven gear is fixedly connected around the rotating ring, and the driving gear and the driven gear are meshed with each other.

[0008] In one example, the upper mold includes a positioning support ring, which is slidably connected to the lifting pressure rod, and the inner side of the positioning support ring is fixedly connected to the mold body by bolts. A casting block is embedded in the center of the mold body, and the casting block is fixedly connected to the mold body by bolts. A gate cap is embedded in the upper part of the casting block, and casting channels are opened in the centers of the casting block and the gate cap.

[0009] In one example, the casting block passes through the mold body, and cross diversion grooves are provided around the casting runner outlet at the lower end of the casting block and at the lower end of the mold body, connecting the casting runner and the mold cavity.

[0010] In one example, the molten steel injection mechanism includes a molten steel injection cylinder, which is fixedly connected to the top of the second lifting plate by bolts, an injection piston is inserted into the molten steel injection cylinder, and the injection piston is fixedly connected to the bottom of the first lifting plate by bolts, a molten steel inlet is opened on one side of the molten steel injection cylinder, and a molten steel injection head is provided at the lower end of the molten steel injection cylinder.

[0011] In one example, the molten steel injection head is conical, and the molten steel injection head and the conical opening at the upper end of the pouring runner in the center of the gate cap are interlocked.

[0012] In one example, the expansion slots are distributed in a spiral shape, the gaps between adjacent expansion slots are equal, and the width of the outer opening of the expansion slot is greater than the width of the inner opening. The movable casting core is tightly fitted with the expansion slot, the expansion slot is opened in an arc shape, and the arc center line of the expansion slot is cocircular with the arc center line of the corresponding first arc slot.

[0013] In one example, one end of the movable casting core is fixedly connected to a sliding limit rod, which is slidingly connected to the first arc groove and the second arc groove at the same time, and the first arc groove and the second arc groove slidingly connected to the same sliding limit rod are in opposite directions and cross each other.

[0014] In one example, a gate sealing mechanism is provided in the casting block, and the gate sealing mechanism includes a sliding groove, a sliding block is slidably connected in the sliding groove, a sliding spring is provided on the outside of the sliding block, a sealing cover is provided at one end of the sliding spring, and the sealing cover is fixedly connected to the casting block by bolts. A flow port is opened on the sliding block, and one end of the sliding block is fixedly connected to a push rod by a thread.

[0015] In one example, the diameter of the flow port is consistent with that of the pouring channel in the pouring block, and the flow port and the pouring channel are staggered with each other, and the length of the ejector pin protruding from the pouring block is equal to the distance between the flow port and the pouring channel.

[0016] In one example, a pressure protection port is provided on one side of the lower end of the molten steel injection cylinder, and a pressure valve is provided in the pressure protection port.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention proposes a core production mold for brake disc casting. Through the mutual cooperation between the movable core and the first arc groove on the lower mold and the second arc groove on the rotating ring, the upper mold and the lower mold are driven to fit together by a hydraulic cylinder, and the rotating ring is driven to rotate by a transmission mechanism. In this way, the movable core can be driven to be inserted into the mold cavity after the lower mold and the upper mold are completely fitted together, thereby achieving the effect of automatic arrangement and positioning. At the same time, when the upper mold and the lower mold are separated after the pouring is completed, the movable core will automatically pop out of the mold cavity, which is convenient for the removal of the casting, reduces the arrangement and separation processes of the core, and greatly improves the production efficiency.

[0019] 2. The present invention proposes a core production mold for brake disc casting. By setting a gate blocking mechanism, when the movable core is not in place, the gate blocking mechanism will block the pouring channel to prevent the flow of molten steel. In this way, the molten steel will push open the pressure valve under pressure and flow out through the pressure protection port. Only when the movable core is fully inserted into the mold cavity and in place will the gate blocking mechanism be pushed to open the pouring channel. Only then will the normal pouring process be carried out, which can avoid equipment damage and reduce the production of defective products. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the appearance and structure of the brake disc casting equipment of the present invention;

[0021] Figure 2 Schematic diagram of the lower mold and upper mold structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the lower mold structure when the movable casting core of the present invention is not inserted into the mold cavity;

[0023] Figure 4 This is a schematic diagram of the lower mold structure when the movable casting core of the present invention is inserted into the mold cavity;

[0024] Figure 5 Schematic diagram of the relative positions of the first arc-shaped groove and the second arc-shaped groove when the movable casting core of the present invention is inserted into the mold cavity;

[0025] Figure 6Schematic diagram of the relative positions of the first arc-shaped groove and the second arc-shaped groove when the movable casting core of the present invention is not inserted into the mold cavity;

[0026] Figure 7 This is a schematic diagram of the upper mold structure of the present invention;

[0027] Figure 8 This is an exploded view of the upper die of the present invention;

[0028] Figure 9 This is a schematic structural diagram of the gate plugging mechanism of the present invention;

[0029] Figure 10 This is a schematic structural diagram of the spring telescopic rod of the present invention;

[0030] Figure 11 This is a structural diagram of the molten steel injection mechanism of the present invention;

[0031] Figure 12 This is a schematic diagram of the top structure of the brake disc cast by the present invention;

[0032] Figure 13 This is a schematic diagram of the bottom structure of the brake disc cast by the present invention.

[0033] Numbers in the figure: 1. Lower mold; 2. Upper mold; 201. Positioning support ring; 202. Mold body; 203. Casting block; 204. Gate cap; 205. Casting runner; 206. Cross diverter groove; 3. Casting base; 4. Hydraulic cylinder; 5. First lifting plate; 6. Support column; 7. Second lifting plate; 8. Buffer spring; 9. Molten steel injection mechanism; 901. Molten steel injection cylinder; 902. Injection piston; 903. Molten steel injection port; 904. Molten steel injection head; 905. Pressure protection port; 906. Pressure valve; 10. Spring telescopic rod; 1001. Telescopic sleeve ;1002, lifting pressure rod;1003, lifting spring;1004, spiral groove;11, return spring;12, rotating slider;1201, driving gear;13, telescopic groove;14, movable casting core;1401, sliding limit rod;15, first arc groove;16, rotating ring;17, second arc groove;18, driven gear;19, gate sealing mechanism;1901, sliding groove;1902, sliding block;1903, sliding spring;1904, sealing cover;1905, flow port;1906, ejector rod;20, brake disc;2001, cooling chamber. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Example 1: Figure 1-13 As shown, a brake disc casting core production mold is used to produce Figure 12 and Figure 13 The brake disc 20 shown has a special structure and cooling cavities 2001 are evenly distributed around the brake disc 20.

[0036] A core production mold for brake disc casting includes a lower mold 1 and an upper mold 2, wherein the upper mold 2 includes a positioning support ring 201, which is slidably connected to the lifting pressure rod 1002, and the inner side of the positioning support ring 201 is fixedly connected to the mold body 202 by bolts, and a pouring block 203 is embedded in the center of the mold body 202, and the pouring block 203 is fixedly connected to the mold body 202 by bolts, and a gate cap 204 is embedded in the upper part of the pouring block 203. A pouring channel 205 is provided in the center of the pouring block 203 and the gate cap 204, and the pouring block 203 passes through the mold body 202. A cross diversion groove 206 is provided around the outlet of the pouring channel 205 at the lower end of the pouring block 203 and the lower end of the mold body 202, and the cross diversion groove 206 connects the pouring channel 205 and the mold cavity. During pouring, molten steel penetrates into the mold through the pouring channel 205 and is evenly dispersed into the mold cavity through the cross diversion groove 206.

[0037] The lower mold 1 is fixedly mounted on the casting base 3, and a hydraulic cylinder 4 is fixedly mounted on the top of the casting base 3. The output end of the hydraulic cylinder 4 is fixedly connected to the first lifting plate 5. A support column 6 is passed through each of the four corners of the first lifting plate 5. The lower end of the support column 6 is fixedly connected to the second lifting plate 7. A buffer spring 8 is provided on the outer sleeve of the support column 6. A molten steel injection mechanism 9 is provided between the second lifting plate 7 and the first lifting plate 5. A spring telescopic rod 10 is provided on each side of the lower mold 1. The spring telescopic rod 10 includes a telescopic sleeve 1001, which is fixedly connected to the casting base 3. A lifting and lowering pressure rod 1002 is inserted into the telescopic sleeve 1001. A lifting spring 1003 is provided at the lower end of the rod 1002, the lifting and lowering pressure rod 1002 passes through the upper mold 2, and the upper mold 2 is slidingly connected to the lifting and lowering pressure rod 1002, and the upper end of the lifting and lowering pressure rod 1002 passes through the second lifting plate 7. A reset spring 11 is provided on the outer side of the lifting and lowering pressure rod 1002, and the reset spring 11 is located below the upper mold 2. When the hydraulic cylinder 4 is opened, the first lifting plate 5 and the second lifting plate 7 are pushed downward together, so that the second lifting plate 7 is in contact with the upper surface of the upper mold 2, so that the molten steel injection mechanism 9 is connected to the pouring runner 205 of the upper mold 2. At the same time, the second lifting plate 7 pushes the upper mold 2 downward, so that the upper mold 2 and the lower mold 1 are in contact with each other, so that the cavity is closed.

[0038] A spiral groove 1004 is provided on the outside of the lifting and lowering pressure rod 1002, and a rotating slider 12 is provided on the outer shell of the lifting and lowering pressure rod 1002. The rotating slider 12 is slidably connected to the spiral groove 1004, and a driving gear 1201 is fixedly connected to the rotating slider 12. A telescopic groove 13 is provided on the side of the mold cavity in the lower mold 1, and a movable casting core 14 is provided in the telescopic groove 13. A first arc groove 15 is provided around the mold cavity of the lower mold 1, and the movable casting core 14 is slidably connected to the first arc groove 15. A rotating ring 16 is rotatably connected around the lower mold 1, and the rotating ring 16 is located above the movable casting core 14. A second arc groove 17 is provided on the rotating ring 16, and the movable casting core 14 is slidably connected to the second arc groove 17. A driven gear 18 is fixedly connected around the rotating ring 16, and the driving gear 1 201 is meshed with the driven gear 18. After the cavity is closed, the first lifting plate 5 continues to push downward. Since the second lifting plate 7 cannot continue to descend, the buffer spring 8 will be compressed, and the first lifting plate 5 will contact the upper end of the lifting pressure rod 1002 and compress the lifting spring 1003, causing the lifting pressure rod 1002 to descend. The lifting pressure rod 1002 is slidingly connected to the telescopic sleeve 1001, and the lifting pressure rod 1002 cannot rotate. Therefore, the rotating slider 12 will rotate by cooperating with the spiral groove 1004, thereby driving the driving gear 1201 to rotate, thereby further driving the driven gear 18 to rotate, so that the rotating ring 16 can be driven to rotate, causing the first arc groove 15 and the second arc groove 17 to be misaligned with each other. One end of the movable casting core 14 is fixedly connected to a sliding limit rod 1401, and the sliding limit rod 1401 is slidingly connected to the first arc groove 15 and the second arc groove 17 at the same time, and the first arc groove 15 and the second arc groove 17 slidingly connected to the same sliding limit rod 1401 are in opposite directions and cross each other, so that the movable casting core 14 will move with the movement of the intersection of the first arc groove 15 and the second arc groove 17, so that the movable casting core 14 is fully inserted into the telescopic groove 13 to form a cooling cavity 2001 during pouring. After the pouring is completed, the upper mold 2 is opened upward, and the lifting pressure rod 1002 will rise under the push of the jacking spring 1003, thereby driving the rotating ring 16 in reverse, so that the movable casting core 14 exits the cooling cavity 2001 outward, and then the casting can be taken out.

[0039] Specifically, the expansion slots 13 are distributed in a spiral shape, the gaps between adjacent expansion slots 13 are equal, and the width of the outer opening of the expansion slots 13 is greater than the width of the inner opening. The movable casting core 14 is tightly fitted into the expansion slots 13. The expansion slots 13 are opened in an arc shape, and the arc center line of the expansion slot 13 is cocircular with the arc center line of the corresponding first arc slot 15. In this way, when the movable casting core 14 moves along the first arc slot 15, the movable casting core 14 will also move in and out along the arc of the expansion slot 13 without interference or collision, making the insertion and exit of the movable casting core 14 smoother.

[0040] Example 2: The molten steel injection mechanism 9 includes a molten steel injection cylinder 901, which is fixedly connected to the upper part of the second lifting plate 7 by bolts. An injection piston 902 is inserted into the molten steel injection cylinder 901, and the injection piston 902 is fixedly connected to the lower part of the first lifting plate 5 by bolts. A molten steel injection port 903 is provided on one side of the molten steel injection cylinder 901, and a molten steel injection head 904 is provided at the lower end of the molten steel injection cylinder 901. The molten steel injection head 904 is conical, and the molten steel injection head 904 is engaged with the conical opening at the upper end of the pouring runner 205 at the center of the gate cap 204. In this way, the molten steel injection cylinder 901 is connected to the upper part of the second lifting plate 7 and the upper part of the second lifting plate 7. When the molds 2 fit together, the molten steel injection head 904 will be embedded in the pouring channel 205. When the first lifting plate 5 continues to descend, the first lifting plate 5 will first push the lifting pressure rod 1002 to insert the movable casting core 14 into place. At the same time, the first lifting plate 5 will push the injection piston 902 to descend. Before the injection piston 902 descends to the molten steel injection port 903, the movable casting core 14 has been inserted into place. After the injection piston 902 blocks the molten steel injection port 903, the molten steel injection cylinder 901 will be sealed, so that the molten steel injection cylinder 901 will be squeezed out from the molten steel injection head 904 and injected into the mold.

[0041] A gate plugging mechanism 19 is provided in the casting block 203, and the gate plugging mechanism 19 includes a sliding groove 1901, a sliding block 1902 is slidably connected in the sliding groove 1901, a sliding spring 1903 is provided on the outside of the sliding block 1902, a sealing cover 1904 is provided at one end of the sliding spring 1903, and the sealing cover 1904 is fixedly connected to the casting block 203 by bolts, a flow port 1905 is provided on the sliding block 1902, and a push rod 1906 is fixedly connected to the casting block 203 at one end by a thread, the flow port 1905 is consistent with the diameter of the casting runner 205 in the casting block 203, and the flow port 1905 and the casting runner 205 are staggered with each other, and the length of the push rod 1906 protruding from the casting block 203 is consistent with the length of the flow The spacing between the through opening 1905 and the pouring channel 205 is equal, so when the movable casting core 14 is fully inserted into place, the movable casting core 14 will push the push rod 1906 and the sliding block 1902, so that the flow opening 1905 on the sliding block 1902 and the pouring channel 205 overlap with each other, thereby opening the pouring channel 205, so that the molten steel can smoothly enter the mold cavity; once the transmission structure is stuck, resulting in the movable casting core 14 not being inserted into place, the sliding block 1902 will be pushed by the sliding spring 1903, so that the flow opening 1905 on the sliding block 1902 and the pouring channel 205 are staggered with each other, thereby blocking the pouring channel 205, making it impossible for the molten steel to enter the mold cavity, thereby avoiding the production of defective products.

[0042] In addition, a pressure protection port 905 is opened on one side of the lower end of the molten steel injection cylinder 901, and a pressure valve 906 is provided in the pressure protection port 905. When the pouring runner 205 is blocked, the injection piston 902 continues to descend, which will cause the pressure in the molten steel injection cylinder 901 to rise until the pressure breaks through the working pressure of the pressure valve 906. The pressure valve 906 will open and the molten steel will be drawn out from the pressure protection port 905 for recovery to avoid equipment damage.

[0043] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A mold for producing a core for casting a brake disc, characterized by: The jacking rod is fixedly mounted on the upper surface of the casting base, and the top of the casting base is fixedly mounted with a hydraulic cylinder. The output end of the hydraulic cylinder is fixedly connected to the first lifting plate. A support column is passed through each of the four corners of the first lifting plate. The lower end of the support column is fixedly connected to the second lifting plate. A buffer spring is provided on the outer sleeve of the support column. A molten steel injection mechanism is provided between the second lifting plate and the first lifting plate. A spring telescopic rod is provided on each side of the lower mold. The spring telescopic rod includes a telescopic sleeve, which is fixedly connected to the casting base. A lifting pressure rod is inserted into the telescopic sleeve. The lifting pressure rod is slidably connected to the telescopic sleeve. A lifting spring is provided at the lower end of the lifting pressure rod. The lifting pressure rod passes through the upper mold, and the upper mold is slidably connected to the lifting pressure rod. The upper end of the lifting pressure rod passes through the second lifting plate. A reset spring is provided on the outer side of the lifting pressure rod. The reset spring is located below the upper mold. A spiral groove is provided on the outside of the lifting pressure rod, and a rotating slider is provided on the outer shell of the lifting pressure rod. The rotating slider is slidably connected to the spiral groove, and a driving gear is fixedly connected to the rotating slider. A telescopic groove is provided on the side of the mold cavity in the lower mold, and a movable casting core is provided in the telescopic groove. A first arc groove is provided around the mold cavity of the lower mold, and the movable casting core is slidably connected to the first arc groove. A rotating ring is rotatably connected around the lower mold, and the rotating ring is located above the movable casting core. A second arc groove is provided on the rotating ring, and the movable casting core is slidably connected to the second arc groove. A driven gear is fixedly connected around the rotating ring, and the driving gear and the driven gear are meshed with each other.

2. The mold for producing a brake disc casting core according to claim 1, wherein: The upper mold includes a positioning support ring, which is slidably connected to the lifting pressure rod. The inner side of the positioning support ring is fixedly connected to the mold body by bolts. A casting block is embedded in the center of the mold body. The casting block is fixedly connected to the mold body by bolts. A gate cap is embedded in the upper part of the casting block. A casting runner is opened in the center of the casting block and the gate cap.

3. The mold for producing a core for casting a brake disc according to claim 2, wherein: The pouring block passes through the mold body, and a cross diversion groove is provided around the pouring flow channel outlet at the lower end of the pouring block and the lower end of the mold body. The cross diversion groove connects the pouring flow channel and the mold cavity.

4. The mold for producing a core for casting a brake disc according to claim 3, wherein: The molten steel injection mechanism includes a molten steel injection cylinder, which is fixedly connected to the top of the second lifting plate by bolts. An injection piston is inserted into the molten steel injection cylinder, and the injection piston is fixedly connected to the bottom of the first lifting plate by bolts. A molten steel inlet is provided on one side of the molten steel injection cylinder, and a molten steel injection head is provided at the lower end of the molten steel injection cylinder.

5. The mold for producing a casting core for a brake disc according to claim 4, wherein: The molten steel injection head is conical, and is engaged with the conical opening at the upper end of the pouring flow channel in the center of the pouring cap.

6. The mold for producing a core for casting a brake disc according to claim 1, wherein: The expansion slots are distributed in a spiral shape, the gaps between adjacent expansion slots are equal, and the width of the outer opening of the expansion slots is greater than the width of the inner opening. The movable casting core is tightly fitted into the expansion slots. The expansion slots are opened in an arc shape, and the arc center line of the expansion slots is cocircular with the arc center line of the corresponding first arc slot.

7. The mold for producing a core for casting a brake disc according to claim 1, wherein: One end of the movable casting core is fixedly connected to a sliding limit rod, which is slidably connected to the first arc groove and the second arc groove at the same time, and the first arc groove and the second arc groove slidably connected to the same sliding limit rod are in opposite directions and cross each other.

8. The mold for producing a casting core for a brake disc according to claim 2, wherein: A gate sealing mechanism is provided in the casting block, and the gate sealing mechanism includes a sliding groove, a sliding block is slidably connected in the sliding groove, a sliding spring is provided on the outside of the sliding block, a sealing cover is provided at one end of the sliding spring, and the sealing cover is fixedly connected to the casting block by bolts. A flow port is provided on the sliding block, and one end of the sliding block is fixedly connected to a push rod by a thread.

9. The mold for producing a casting core for a brake disc according to claim 8, wherein: The diameter of the circulation port is consistent with that of the pouring channel in the pouring block, and the circulation port and the pouring channel are staggered with each other. The length of the ejector rod protruding from the pouring block is equal to the distance between the circulation port and the pouring channel.

10. The mold for producing a casting core for a brake disc according to claim 4, wherein: A pressure protection port is provided on one side of the lower end of the molten steel injection cylinder, and a pressure valve is provided in the pressure protection port.

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