Brake drum female die

Abstract

The utility model provides a brake drum female die. The brake drum female die comprises a die body, a movable type set and a pressing block, the periphery of the section of the die body is circular; a first cambered surface is arranged on the peripheral side of the lower part of the mold body; a notch is formed in the first cambered surface; the movable type set comprises a plurality of movable type blocks which are sequentially arranged in the circumferential direction of the die body, and character dies are arranged on the peripheries of the movable type blocks in a protruding mode. A second cambered surface is formed on the periphery of the movable type group, and the second cambered surface and the first cambered surface are located in the same cambered surface; the pressing block is contained in the notch and detachably connected with the die body. The pressing block is connected with the movable type set in a clamping mode so that the pressing block can press the movable type set and limit the movable type set in the notch. When the brake drum female die is used, the same type matrix tracing mark can be formed on the brake drum rough blank through the type matrix on the movable type group, so that the brake drum rough blank can be traced to a production team and a production furnace through the tracing mark during subsequent processing and assembling, and the tracing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, and in particular to a brake drum mold. Background Technology

[0002] With the expansion of the automobile market, the market demand for brake drums in commercial vehicles has increased accordingly. Furthermore, because brake drums are considered safety components, the automotive industry and related manufacturers have strict requirements for them, including the requirement for traceable markings such as production batch numbers.

[0003] Currently, with manufacturers implementing traceability of brake drum markings and refined management of the production process, the traceability markings are not only controlled down to the year, month, and day, but are also being refined to include production lines, production teams, and production furnaces.

[0004] However, existing traceability labels are generally laser-engraved onto brake drums. When the traceability label needs to trace back to information such as production line, production team, and production furnace, there are many engraving steps, the processing procedures are complex, and the engraving efficiency is low. Utility Model Content

[0005] The purpose of this application is to provide a brake drum master mold that can flexibly adjust the traceability mark, so that the traceability mark can be traced back to the production line, production team and production batch, thereby reducing processing steps and improving production efficiency.

[0006] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0007] According to one aspect of this application, a brake drum master mold is provided, comprising: a mold body, a type assembly, and a clamping block; the outer periphery of the mold body cross-section is circular; the lower periphery of the mold body has a first arc surface; the first arc surface has a notch; the type assembly includes a plurality of type blocks arranged sequentially along the circumference of the mold body, and the outer periphery of the type blocks has a protruding type pattern; any two adjacent type blocks are tightly fitted together, and the two outermost type blocks are fitted to the two circumferential sidewalls of the notch; the upper surface of the type assembly is fitted to the top wall of the notch; the outer periphery of the type assembly forms a second arc surface, the second arc surface and the first arc surface being located in the same arc surface; the clamping block is accommodated in the notch, and the clamping block is detachably connected to the mold body; the clamping block is engaged with the type assembly to press and confine the type assembly within the notch.

[0008] In some embodiments, the first arc surface and the second arc surface enclose a circumferentially extending inclined surface, which is inclined outward in a bottom-up direction.

[0009] In some embodiments, when the clamping block presses the movable type assembly against the notch, the lower surface of the clamping block is flush with the lower surface of the mold body, and the outer peripheral wall of the clamping block forms a third arc surface. The third arc surface, the second arc surface, and the first arc surface together form the inclined surface.

[0010] In some embodiments, the inner sidewall of the movable type block is provided with an extension portion, which extends radially along the mold body; the lower surface of the extension portion is provided with a downwardly extending first limiting block; the upper surface of the pressing block is provided with one or more first limiting grooves relative to the plurality of first limiting blocks, the first limiting blocks are engaged in the first limiting grooves, and the outer peripheral wall of the pressing block abuts against the inner peripheral wall of the movable type group.

[0011] In some embodiments, the upper surface of the clamping block is flush with the upper surface of the type assembly and both are attached to the top wall of the notch.

[0012] In some embodiments, a second limiting block is protruding from the upper surface of the clamping block, and a second limiting groove is recessed upward from the top wall of the notch. The second limiting block is detachably engaged in the second limiting groove to limit the movement of the clamping block along the radial direction of the mold body.

[0013] In some embodiments, the lower surface of the clamping block is recessed with a first connecting groove; the lower surface of the mold body is recessed with a second connecting groove, the second connecting groove being connected to the first connecting groove;

[0014] The brake drum mold also includes a connecting plate, which is housed in the first connecting groove and the second connecting groove. The connecting plate is detachably connected to the mold body to press the clamping block into the notch. The lower surface of the connecting plate is flush with the lower surface of the mold body.

[0015] In some embodiments, the fitting gap between any two adjacent type blocks is less than or equal to 0.05 mm.

[0016] In some embodiments, the clearance between the clamping block and the mold body on one side is less than or equal to 0.1 mm.

[0017] In some embodiments, the clearance between the clamping block and the movable type block on one side is less than or equal to 0.1 mm.

[0018] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0019] In this application, when workers produce brake drum blanks using the brake drum master mold, multiple movable type blocks representing traceability information are first removed and arranged to form a movable type group. The movable type group engages with a clamping block, which is connected to the mold body, thus pressing the movable type group into a notch. When the brake drum master mold is used, the type molds on the movable type blocks can be inserted into the upper or lower sand mold. After the upper and lower sand molds are connected, casting liquid is injected between them to produce the brake drum blank. A traceability mark with the same type mold as the movable type group is formed on the brake drum blank, allowing traceability to the date, molding line, production shift, and production furnace number. This improves traceability efficiency and reduces subsequent laser engraving processes, thus reducing processing steps and increasing production efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the brake drum mold of this application.

[0021] Figure 2 yes Figure 1 Top view of the structure shown.

[0022] Figure 3 yes Figure 1 The diagram shows a structural schematic from another perspective.

[0023] Figure 4 This is a schematic diagram of the structure of the brake drum master mold after disassembly.

[0024] Figure 5 yes Figure 4 The diagram shows a structural schematic from another perspective.

[0025] Figure 6 This is a schematic diagram of the combined structure of the movable type, clamping block and connecting plate of this application.

[0026] Figure 7 This is an exploded structural diagram of the movable type assembly, clamping block, and connecting plate of this application.

[0027] Figure 8 yes Figure 1 The diagram shows the structure after the connecting plate is removed.

[0028] Figure 9 yes Figure 1 A cross-sectional view of the structure shown.

[0029] Figure 10 yes Figure 9 Enlarged view of the structure at point A in the middle.

[0030] Figure 11 This is a schematic diagram of the structure of the master mold in this application.

[0031] Figure 12 This is a schematic diagram of the structure of the master mold in this application.

[0032] The reference numerals in the attached drawings are explained as follows: 100, mold body; 110, braking groove; 120, notch; 121, second limiting groove; 130, first arc surface; 140, second connecting groove; 200, movable type assembly; 210, movable type block; 211, second arc surface; 221, type mold; 222, extension; 223, first limiting block; 224, engaging groove; 300, clamping block; 310, third arc surface; 320, first limiting groove; 330, locking block; 340, second limiting block; 350, first connecting groove; 400, connecting plate; 500, upper female mold; 600, lower female mold; 611, connecting structure. Detailed Implementation

[0033] Typical embodiments embodying the features and advantages of this application will be described in detail in the following description. It should be understood that this application can have various variations in different embodiments, all of which do not depart from the scope of this application, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this application.

[0034] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] The brake drum master mold is used to press sand together to form an upper sand mold (not shown in the figure) and a lower sand mold (not shown in the figure). After the upper and lower sand molds are produced, they are connected to form a casting cavity. After the upper and lower sand molds are connected, molten casting is injected into the casting cavity. The molten casting solidifies in the casting cavity to form a rough brake drum blank (not shown in the figure). After the rough brake drum blank is formed, it undergoes quenching, polishing, and other processes to form the final brake drum.

[0036] Figure 1 This is a schematic diagram of the brake drum mold of this application. Figure 2 yes Figure 1 Top view of the structure shown. Figure 3 yes Figure 1 The diagram shows a structural schematic from another perspective.

[0037] See Figures 1 to 3 This application provides a brake drum master mold with a circular outer perimeter in its cross-section. The brake drum master mold includes a detachably connected type assembly 200, which includes multiple type blocks 210. Type blocks 210 have protruding mold characters 221. When information such as production shift or furnace number changes, workers can disassemble the type assembly 200 to change the type blocks 210, thereby adjusting the composition order of the type assembly 200 in the brake drum master mold in real time. This causes changes in the inner walls of the upper and lower sand molds produced by the brake drum master mold. Ultimately, this results in multiple mold characters 221 protruding on the produced brake drum blank, adapted to information such as production shift and furnace number. These multiple mold characters 221 form a traceability identifier, allowing workers to trace production shifts and furnace numbers, effectively ensuring the production quality of the brake drum.

[0038] See Figure 1 For ease of understanding and description, the state of the brake drum mold placed on the working ground is taken as a reference, and the axial direction of the brake drum mold is taken as the up and down direction in the following text.

[0039] Figure 4 This is a schematic diagram of the structure of the brake drum master mold after disassembly. Figure 5 yes Figure 4 The diagram shows a structural schematic from another perspective. Figure 6 This is a schematic diagram of the combined structure of the movable type, clamping block and connecting plate of this application. Figure 7 This is an exploded structural diagram of the movable type assembly, clamping block, and connecting plate of this application.

[0040] See Figures 1 to 7This utility model provides a brake drum master mold, comprising: a mold body 100, a type assembly 200, and a clamping block 300. The mold body 100 has an upward-opening barrel-shaped structure, and a notch 120 is formed on the lower periphery of the mold body 100. A first arc surface 130 is formed on the periphery wall of the notch 120 of the mold body 100, and the first arc surface 130 and the notch 120 are at the same vertical height. The type assembly 200 includes a plurality of type blocks 210 arranged sequentially along the circumference of the mold body 100, and a type mold 221 is protruding from the outer periphery of the type blocks 210. Any two adjacent type blocks 210 are tightly fitted, and the two outermost type blocks 210 are fitted to the two circumferential side walls of the notch 120. The upper surface of the type assembly 200 is fitted to the top wall of the notch 120. A second arc surface 211 is formed on the outer periphery of the type assembly 200, and the second arc surface 211 and the first arc surface 130 are located in the same arc surface. The clamping block 300 is housed within the notch 120 and is detachably connected to the mold body 100. The clamping block 300 engages with the type assembly 200 so that the clamping block 300 presses and confines the type assembly 200 within the notch 120.

[0041] When information such as production shift or production furnace number changes, the staff can remove the clamping block 300 from the mold body 100 to adjust the composition order of multiple movable type blocks 210 in the movable type group 200, thereby adjusting the character mold 221 formed by the combination of multiple movable type blocks 210.

[0042] After the worker adjusts the movable type assembly 200, the clamping block 300 is connected to the movable type assembly 200, and then the movable type assembly 200 is pressed against the upper side wall of the notch 120. Afterwards, the clamping block 300 is connected to the mold body 100, thereby confining the movable type assembly 200 on the notch 120 of the mold body 100.

[0043] After the brake drum master mold adjusts the movable type group 200, it is moved to produce the upper and lower sand molds. The upper and lower sand molds are then connected, and molten casting is injected into the casting cavity, where it solidifies to form the brake drum blank. Furthermore, multiple traceability markers formed by type molds 221 are formed on the outer periphery of the brake drum blank. This allows subsequent processing and usage of the brake drum to be traced back to the production shift and furnace number, enabling real-time traceability from the start of production. This effectively improves the production quality of the brake drums and ensures the safety of each brake drum in use.

[0044] Figure 8 yes Figure 1 The diagram shows the structure after the connecting plate is removed. Figure 9 yes Figure 1 A cross-sectional view of the structure shown. Figure 10 yes Figure 9 Enlarged view of the structure at point A in the middle.

[0045] See Figures 1 to 10 In this embodiment, the brake drum master mold includes a mold body 100. The mold body 100 has an upward-facing brake groove 110. After the brake drum is assembled into a carrier, the brake groove 110 is used to accommodate part of the braking device.

[0046] A notch 120 is provided on the lower peripheral side wall of the mold body 100. The notch 120 is used to accommodate the movable type assembly 200 and the clamping block 300, so as to accommodate and limit the movable type assembly 200, thus having a traceability mark from the casting of the brake drum, so as to facilitate the real-time traceability of the brake drum in the future.

[0047] The notch 120 includes a top wall, two side walls, and an inner side wall. The top wall, two side walls, and inner side wall together form the notch 120 to accommodate and limit the movable type assembly 200 and the clamping block 300.

[0048] See Figures 1 to 10 In this embodiment, the mold body 100 forms a first arc surface 130 on the peripheral sidewall of the notch 120. The first arc surface 130 can be located in the same arc surface as the outer peripheral wall of the movable type assembly 200, so as to ensure that the outer surface of the brake drum master mold is smooth, thereby ensuring that the inner wall of the casting cavity formed between the upper sand mold and the lower sand mold is smooth, and improving the casting quality of the brake drum blank.

[0049] See Figures 1 to 10 In this embodiment, the brake groove 110 and the notch 120 are not connected, so as to ensure the smoothness of the lower surface of the brake groove 110, thereby facilitating the removal of the upper sand mold and the lower sand mold from the brake drum master mold and improving the surface quality of the brake drum.

[0050] In some embodiments, the brake groove 110 is connected to the notch 120 so that when the type assembly 200 and the clamping block 300 are confined within the notch 120, the type assembly 200 and / or the clamping block 300 can close the notch 120 and ensure that the inner wall of the brake groove 110 is smooth.

[0051] See Figures 3 to 7 , Figure 9 and Figure 10 In this embodiment, the brake drum master mold includes a type assembly 200. The type assembly 200 is detachably housed within the notch 120. The type assembly 200 includes multiple type blocks 210, which allows workers to change and adjust each type block 210 according to actual needs to form a combination of type molds 221 representing different production batches, production shifts, and other information. This avoids subsequent laser engraving processing steps, reduces the processing steps of the brake drum, effectively improves the traceability efficiency and production efficiency of the brake drum, and ensures the product quality of the brake drum.

[0052] See Figure 6 and Figure 7 In this embodiment, any two adjacent movable type blocks 210 are tightly fitted together, and the fitting gap between any two adjacent movable type blocks 210 is less than or equal to 0.05mm. This not only facilitates the quick disassembly and replacement of the movable type blocks 210, but also prevents sand from seeping into the gap when the brake drum mold is pressing sand, thus ensuring the smoothness of the outer periphery of the brake drum mold.

[0053] See Figures 3 to 5 , Figures 8 to 10 In this embodiment, when the movable type group 200 is pressed into the notch 120, the two outermost movable type blocks 210 are attached to the two circumferential sidewalls of the notch 120. Furthermore, the single-sided fitting gap between the clamping block 300 and the mold body 100 is less than or equal to 0.1 mm; that is, the fitting gap between the outermost clamping block 300 and the adjacent circumferential sidewall of the notch 120 is less than or equal to 0.1 mm. This ensures that when the clamping block 300 is easily engaged with the mold body 100, gaps between the clamping block 300 and the mold body 100 are avoided, guaranteeing the smoothness of the outer periphery of the brake drum mold.

[0054] See Figures 3 to 10 In this embodiment, the outer peripheral wall of the movable type assembly 200 forms a second arc surface 211. When the clamping block 300 presses the upper surface of the movable type assembly 200 against the top wall of the notch 120, the second arc surface 211 and the first arc surface 130 are located in the same arc surface, thereby ensuring the smoothness of the outer periphery of the brake drum mold and ensuring the production quality of the brake drum.

[0055] See Figures 3 to 10 In this embodiment, a type mold 221 is provided at the center of the outer peripheral wall of the movable type block 210, so that the staff can adjust the order of movable type blocks 210 with different type molds 221 and change information such as production furnace number and production shift.

[0056] See Figures 1 to 5 , Figure 8 In this embodiment, the first arc surface 130 and the second arc surface 211 enclose a ring-shaped inclined surface, which is inclined outward from bottom to top. When the movable type assembly 200 is confined within the notch 120, the first arc surface 130 and the second arc surface 211 form an inclined surface, which facilitates the separation of the upper sand mold and the lower sand mold from the brake drum master mold, thereby improving the production efficiency of the upper sand mold and the lower sand mold, thus improving the production efficiency of the brake drum and ensuring the production quality of the brake drum.

[0057] See Figure 6 , Figure 7 and Figure 10In this embodiment, an extension 222 protrudes from the inner sidewall of the movable type block 210. The extension 222 extends radially toward the axis of the brake drum mold body 100. A first limiting block 223 protrudes downward from the lower surface of the extension 222. The first limiting block 223 engages with the clamping block 300 so that the clamping block 300 can limit the movable type block 210 within the notch 120, thereby limiting the movement of the movable type block 210 in the vertical and circumferential directions, ensuring the structural stability and reliability of the brake drum mold body, and ensuring the smoothness of the outer periphery of the brake drum mold body.

[0058] In some embodiments, the movable type 210, the extension 222, and the first limiting protrusion 223 form a U-shaped structure, such that there is a gap between the first limiting block 223 and the inner sidewall of the movable type 210 to form an engagement groove 224. The engagement groove 224 is used to accommodate a portion of the clamping block 300 to improve the connection strength between the clamping block 300 and the movable type 210 and to ensure the structural stability of the clamping block 300 mold.

[0059] Part of the clamping block 300 is housed in the engaging groove 224 to stably confine the movable type assembly 200 within the notch 120. On the one hand, this can prevent the movable type assembly 200 and the clamping block 300 from falling off due to centrifugal force when the brake drum mold rotates and moves, thus ensuring the structural stability of the brake drum mold. On the other hand, after the brake drum mold holds the sand, it can also enable the movable type assembly 200 to overcome the frictional force generated when the brake drum mold moves away from the lower sand mold.

[0060] Meanwhile, when the brake drum mold is cleaned after use, the clamping block 300 can stably confine the movable type 200 within the notch 120, thereby overcoming the impact force generated by high-pressure water flow or high-pressure airflow when cleaning the brake drum mold, so as to prevent the movable type 210 from falling off.

[0061] In some embodiments, any two adjacent extensions 222 are tightly fitted together, and the two outermost extensions 222 abut against the circumferential side walls of the notch 120 to ensure the structural strength and stability of the type assembly 200, prevent the type assembly 200 from vibrating under external pressure, improve the smoothness of the outer periphery of the brake drum mold, and thus improve the surface quality of the outer periphery of the brake drum.

[0062] See Figures 3 to 10In this embodiment, the brake drum mold further includes a clamping block 300. The clamping block 300 is housed within the notch 120 and engages with the type assembly 200 to press the type assembly 200 within the notch 120, thereby limiting the movement of the type assembly 200. The circumferential side walls of the clamping block 300 abut against the circumferential side walls of the notch 120 to ensure the connection strength and stability between the clamping block 300 and the mold body 100, prevent the clamping block 300 from vibrating under external pressure, improve the smoothness of the outer periphery of the brake drum mold, and thus improve the surface quality of the outer periphery of the brake drum.

[0063] See Figures 4 to 10 In this embodiment, the clamping block 300 extends circumferentially along the mold body 100. When the clamping block 300 presses the movable type assembly 200 against the notch 120, the lower surface of the clamping block 300 is flush with the lower surface of the mold body 100. The outer peripheral wall of the lower part of the clamping block 300 forms a third arc surface 310, which is located below the second arc surface 211. The third arc surface 310, the second arc surface 211, and the first arc surface 130 enclose and form an inclined surface. The inclined surface is set outward from bottom to top to ensure the smoothness of the outer peripheral wall and lower surface of the brake drum mold, thereby ensuring the smoothness of the casting cavity between the upper and lower sand molds and facilitating the separation of the upper and lower sand molds from the brake drum mold, ensuring the product quality of the brake drum blank, facilitating subsequent processing of the brake drum blank, and improving the production efficiency of the brake drum.

[0064] In some embodiments, the third arc surface 310 and the lower surface of the clamping block 300 are smoothly transitioned, and the first arc surface 130 and the lower surface of the mold body 100 are smoothly transitioned, so as to facilitate the brake drum mold to be disengaged from the upper sand mold or the lower sand mold.

[0065] See Figure 6 , Figure 7 and Figure 10 In this embodiment, the top wall of the pressing block 300 is recessed with a first limiting groove 320 relative to the plurality of first limiting blocks 223, and the first limiting blocks 223 are engaged in the first limiting groove 320.

[0066] There is one first limiting groove 320. The first limiting groove 320 extends circumferentially along the mold body 100 to form an arc-shaped elongated groove structure. The first limiting groove 320 is used to simultaneously accommodate multiple first limiting blocks 223, thereby facilitating the engagement of the movable type assembly 200 and the clamping block 300 and improving the assembly efficiency of the brake drum mold.

[0067] In some embodiments, there are multiple first limiting grooves 320. These multiple first limiting grooves 320 are spaced apart on the clamping block 300. The clamping block 300 engages with the first limiting blocks 223 on the multiple movable type blocks 210 through the multiple first limiting grooves 320, thereby pressing the movable type group 200 within the notch 120 and limiting the movement of the movable type group 200 in the vertical and circumferential directions. Simultaneously, the first limiting grooves 320 on the clamping block 300 also facilitate the adjustment of the order of the movable type blocks 210 by the operator, improving the stability of the connection between the movable type group 200 and the clamping block 300, reducing adjustment and assembly time, and improving work efficiency.

[0068] In other embodiments, the first limiting blocks 223 of the plurality of movable type blocks 210 extend circumferentially along the mold body 100, and any two adjacent movable type blocks 210 abut against each other, and the first limiting blocks 223 of the outermost movable type block 210 abut against the circumferential side walls of the notch 120 respectively, so as to ensure the stability and reliability of the movable type group 200 and prevent sand and gravel from seeping into the gaps between the movable type blocks 210 and the gaps between the movable type blocks 210 and the notch 120.

[0069] In some embodiments, the outer peripheral wall of the upper part of the clamping block 300 abuts against the inner peripheral wall of the type assembly 200 to ensure the connection strength and structural stability between the clamping block 300 and the type assembly 200.

[0070] In some embodiments, the clamping block 300 extends into the engaging groove 224 at the portion of the first limiting groove 320 near the movable type 210 to form a locking block 330. The locking block 330 can abut against the inner sidewall of the first limiting block 223 and the movable type 210 to improve the connection strength and stability between the movable type group 200 and the clamping block 300.

[0071] In other embodiments, the locking block 330 protrudes upward to abut against the upper surface of the locking groove 224, thereby overcoming the centrifugal force when the brake drum mold moves and rotates, overcoming the frictional force between the brake drum mold and the sand when it detaches from the lower sand mold, overcoming the external force of rinsing when rinsing the brake drum mold, improving the connection strength and stability between the movable type assembly 200 and the clamping block 300, and preventing the movable type assembly 200 from accidentally detaching from the notch 120.

[0072] In some embodiments, the single-sided fitting gap between the clamping block 300 and the movable type block 210 is less than or equal to 0.1 mm, that is, the single-sided fitting gap between the locking block 330 and the locking groove 224 is less than or equal to 0.1 mm, thereby avoiding gaps between the clamping block 300 and the movable type group 200 when the clamping block 300 and the movable type block 210 are easily engaged and connected, and ensuring the smoothness of the outer periphery of the brake drum mold.

[0073] See Figures 4 to 7 and Figure 10In this embodiment, a second limiting block 340 protrudes from the upper surface of the clamping block 300, and a second limiting groove 121 is recessed upward from the top wall of the notch 120. The second limiting block 340 can be detachably engaged in the second limiting groove 121 to limit the movement of the clamping block 300 along the radial direction of the mold body 100. This improves the connection strength and stability between the clamping block 300 and the mold body 100, prevents the clamping block 300 from dislodging from the notch 120 radially, and improves the overall structural strength and reliability of the brake drum mold.

[0074] See Figures 4 to 7 and Figure 10 In this embodiment, the upper surface of the clamping block 300 is flush with the upper surface of the movable type assembly and both are attached to the top wall of the notch 120. This limits the movement of the movable type block 210 in the vertical and circumferential directions, improving the connection strength and stability between the movable type assembly 200, the clamping block 300, and the mold body 100. Furthermore, it improves the installation efficiency of the movable type assembly 200, the clamping block 300, and the mold body 100, avoiding instability during the installation of the movable type block 210 assembly.

[0075] See Figures 4 to 7 and Figure 10 In this embodiment, the lower surface of the clamping block 300 is recessed with a first connecting groove 350. The lower surface of the mold body 100 is recessed with a second connecting groove 140, which communicates with the first connecting groove 350.

[0076] The brake drum mold also includes a connecting plate 400, which is housed in a first connecting groove 350 and a second connecting groove 140. The connecting plate 400 is detachably connected to the mold body 100 to press the clamping block 300 into the notch 120. The lower surface of the connecting plate 400 is flush with the lower surface of the mold body 100.

[0077] When the clamping block 300 is connected to the mold body 100 via the connecting plate 400, the connecting plate 400 can press the clamping block 300 into the notch 120, thereby limiting the movement of the clamping block 300 in the vertical direction together with the mold body 100. Furthermore, the mold body 100 limits the movement of the clamping block 300 in the circumferential direction via the second limiting groove 121, so as to ensure the connection strength and stability of the clamping block 300, the movable type assembly 200 and the brake drum female mold.

[0078] In some embodiments, the connecting plate 400 is screwed to the mold body 100 to facilitate disassembly and assembly by workers, improving their work efficiency. Furthermore, the connection between the clamping block 300 and the mold body 100 can be moved from the periphery of the mold body 100 to the lower surface of the mold body 100, preventing stress concentration and cracking at the lower periphery of the brake groove 110 of the mold body 100. Simultaneously, it avoids the difficulties in manufacturing and the cumbersome processing of the brake drum mold, reducing the production cost of the brake drum mold.

[0079] In other embodiments, there is no need to provide a connecting plate 400. The clamping block 300 is detachably connected to the mold body 100. The screw extends in the vertical direction to pass through the clamping block 300 and the second limiting block 340 and is threadedly connected to the mold body 100, so that the clamping block 300 and the mold body 100 can be detachably connected.

[0080] See Figures 1 to 10 This application provides a brake drum mold having a detachable clamping block 300 and a movable type assembly 200. When information such as production shift or production batch changes, the operator removes the clamping block 300 so that the clamping block 300 and the movable type assembly 200 disengage from the notch 120.

[0081] After the movable type 200 comes out of the gap 120, the staff can change the movable type block 210 or adjust the composition order of the movable type 200 so that the type mold 221 on the movable type 200 can form the corresponding traceability mark.

[0082] Afterwards, the workers engage the movable type 200 with the clamping block 300, and then move the movable type 200 and the clamping block 300 into the notch 120 so that the clamping block 300 can be assembled with the mold body 100, thereby confining the modified movable type 200 within the notch 120.

[0083] Alternatively, the worker can first move the movable type 200 into the notch 120, and then press the clamping block 300 onto the movable type 200 so that the clamping block 300 is assembled with the mold body 100, thereby confining the modified movable type 200 within the notch 120.

[0084] After the brake drum master mold is produced, it is used to produce the upper and lower sand molds. The type molds 221 on the type assembly 200 can be inserted into either the upper or lower sand mold. After the upper and lower sand molds are connected, casting liquid is injected into the casting cavity to produce the brake drum blank. The brake drum blank has the same traceability markings as the type assembly 200, which allows for traceability to the production line, production shift, and production furnace during subsequent processing and assembly, improving traceability efficiency. Furthermore, it reduces subsequent laser engraving processes, decreasing processing steps and increasing production efficiency.

[0085] Figure 11 This is a schematic diagram of the structure of the master mold in this application. Figure 12 This is a schematic diagram of the structure of the master mold in this application.

[0086] See Figure 11 and Figure 12 Another embodiment of the brake drum female mold of this utility model:

[0087] See Figure 11 In this embodiment, the structure on the brake drum master mold is moved to the two master molds respectively to form an upper master mold (not shown in the figure) and a lower master mold (not shown in the figure). The upper master mold is used to produce the upper sand mold, and the lower master mold is used to produce the lower sand mold.

[0088] In this embodiment, the upper mold includes an upper mold body. A braking groove 110 is formed on the upper surface of the upper mold body, so that the upper mold body has a barrel-shaped structure with an opening on the upper side. The upper surface of the upper mold body and the inner surface of the braking groove 110 are used to press sand, so that the sand fills the braking groove 110 and forms an upper sand mold.

[0089] See Figure 12 In this embodiment, the lower mold includes a lower mold body. The lower mold body has a columnar structure. The upper surface of the lower mold body may have a braking groove 110, or it may not have a braking groove 110, so that the outer periphery of the lower mold cross-section is circular.

[0090] In some embodiments, the upper surface of the lower mold body is provided with a connecting structure 611 for moving the lower female mold. The connecting structure 611 can be a fastening bolt, a fastening screw hole, a locking post, or other structures to facilitate the connection between the lower female mold and an external driving structure. When the external driving structure is connected to the connecting structure 611, the lower female mold can be moved by moving the connecting structure 611.

[0091] In other embodiments, the lower periphery of the upper mold body may also be provided with a connecting structure for moving the lower female mold.

[0092] In this embodiment, the lower mold also includes a set of movable type 200 and a pressing block 300. A notch 120 is provided on the lower outer periphery of the lower mold body, and the set of movable type 200 and the pressing block 300 are detachably disposed within the notch 120. The outer surface of the lower mold is used to press against the sand, so that the outer periphery and bottom of the lower mold can squeeze the sand to form a lower sand mold.

[0093] Afterwards, the workers can connect the upper and lower sand molds to form a casting cavity. Once the upper and lower sand molds are connected, molten casting is injected into the casting cavity, where it solidifies to form the brake drum blank.

[0094] In this embodiment, the brake drum mold can also be an upper mold and a lower mold. A notch 120 is opened on the lower outer periphery of the lower mold, and a movable type group 200 and a pressing block 300 are provided in the notch 120. A brake groove 110 is opened on the upper surface of the upper mold.

[0095] In other embodiments, the brake drum mold may be only a lower mold, with a notch 120 on the lower outer periphery of the lower mold, and a movable type assembly 200 and a clamping block 300 disposed within the notch 120.

[0096] Although this application has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since this application can be embodied in many forms without departing from the spirit or essence of the utility model, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A brake drum mold, characterized in that, include: The mold body has a circular outer perimeter in cross-section; the lower periphery of the mold body has a first arc surface; the first arc surface has a notch. The movable type assembly includes a plurality of movable type blocks arranged sequentially along the circumference of the mold body, with a type mold protruding from the outer periphery of each movable type block; any two adjacent movable type blocks are tightly fitted together, and the two outermost movable type blocks are fitted to the two circumferential sidewalls of the notch; the upper surface of the movable type assembly is fitted to the top wall of the notch; the outer periphery of the movable type assembly forms a second arc surface, and the second arc surface and the first arc surface are located in the same arc surface; A clamping block is housed within the notch and is detachably connected to the mold body; the clamping block engages with the type assembly to hold and confine the type assembly within the notch.

2. The brake drum mold according to claim 1, characterized in that, The first arc surface and the second arc surface together form a ring-shaped inclined surface, which is inclined outward in the direction from bottom to top.

3. The brake drum mold according to claim 2, characterized in that, When the clamping block presses the movable type assembly against the notch, the lower surface of the clamping block is flush with the lower surface of the mold body, and the outer peripheral wall of the clamping block forms a third arc surface. The third arc surface, the second arc surface, and the first arc surface together form the inclined surface.

4. The brake drum mold according to claim 1, characterized in that, The inner sidewall of the movable type block is provided with an extension portion, which extends radially along the mold body; the lower surface of the extension portion is provided with a first limiting block extending downward. The upper surface of the pressing block is recessed with one or more first limiting grooves relative to the plurality of first limiting blocks, the first limiting blocks are engaged in the first limiting grooves, and the outer peripheral wall of the pressing block abuts against the inner peripheral wall of the movable type assembly.

5. The brake drum mold according to claim 4, characterized in that, The upper surface of the clamping block is flush with the upper surface of the movable type assembly, and both are attached to the top wall of the notch.

6. The brake drum mold according to claim 1, characterized in that, The upper surface of the clamping block is provided with a second limiting block, and the top wall of the notch is provided with a second limiting groove. The second limiting block can be detachably engaged in the second limiting groove to limit the movement of the clamping block along the radial direction of the mold body.

7. The brake drum mold according to claim 1, characterized in that, The lower surface of the clamping block is recessed with a first connecting groove; The lower surface of the mold body is recessed with a second connecting groove, which is connected to the first connecting groove; The brake drum mold also includes a connecting plate, which is housed in the first connecting groove and the second connecting groove. The connecting plate is detachably connected to the mold body to press the clamping block into the notch. The lower surface of the connecting plate is flush with the lower surface of the mold body.

8. The brake drum mold according to claim 1, characterized in that, The fit gap between any two adjacent type blocks is less than or equal to 0.05 mm.

9. The brake drum mold according to claim 1, characterized in that, The clearance between the clamping block and the mold body on one side is less than or equal to 0.1 mm.

10. The brake drum mold according to claim 1, characterized in that, The clearance between the clamping block and the movable type block on one side is less than or equal to 0.1 mm.

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