A casting device for a rear shell of a breaker hammer and a method of using the same

Abstract

The present invention discloses a casting device for a rear shell of a breaker hammer and a method for using the same, and belongs to the technical field of metal casting. The device comprises an outer casting shell, wherein two middle casting molds are arranged on the inner side of the outer casting shell, and the two middle casting molds are molded together on the inner side of the outer casting shell; an upper side shell casting mold and a lower side shell casting mold are arranged on the outer side of the middle casting mold, and the upper side shell casting mold and the lower side shell casting mold are molded together on the side of the middle casting mold one above and one below; in the present invention, two upper and lower Z-shaped partitions separate the casting cavities, and the separated cavities are filled with molten metal; the shaping shell mold is controlled to move close to the middle casting mold by the outer edge shell mold deformed at the tail end; the outer edge shell mold guides a certain amount of molten metal to the connecting bridge cavity, and the molten metal release groove is gradually exposed in the cavity, so that the molten metal in each cavity is active; at the same time, starting from the connecting bridge cavity, impact mixing occurs from the outer area to the inner area of ​​each cavity, and the molten metal is effectively mixed.

Description

Technical Field

[0001] The invention relates to the technical field of metal casting, and in particular to a casting device for a rear shell of a breaker hammer and a use method thereof. Background Art

[0002] The rear shell of the breaker hammer is cast by metal through a mold matching the rear shell of the breaker hammer. The mold is an integrated structure matching the rear shell of the breaker hammer. The molten metal is poured into the shell cavity from a gate fixed at the top of the mold. The molten metal gradually fills the cavity from bottom to top, and the filled molten metal stays in the cavity to cool and solidify. The rear shell of the breaker hammer has two irregularly shaped side plates and a middle connecting bridge. The connecting bridge between the upper and lower vertical plate parts of the side plate faces inward and has an irregular arc portion, which causes the upper and lower connecting areas of the connecting bridge to shrink inward, resulting in uneven wall thickness of the connecting bridge in the region. The narrow end area of ​​the shrinking connecting bridge requires less molten metal than other parts, so that the narrow end part of the shrinking connecting bridge requires a shorter cooling time than other parts, and the regional interval filling and mixing of the molten metal in the cavity cannot be effectively performed, which makes the connecting bridge part of the side plate prone to premature cooling, resulting in a hot node at the narrow end of the connecting bridge part of the side plate, affecting the casting effect of the breaker hammer shell. Summary of the invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a casting device for a rear shell of a breaker hammer and a method for using the same. The casting mold cavity is divided by two upper and lower Z-shaped partitions, so that the molten metal can intermittently fill the lower plate cavity, the upper plate cavity and the special-shaped bridge cavity. The shaping shell mold is controlled to move by the outer edge shell mold deformed at the tail end to be fastened to the middle casting mold. A certain amount of molten metal is pre-entered into the connecting bridge cavity by the push of the outer edge shell mold. The molten metal release groove is gradually exposed in the connecting bridge cavity to connect the lower plate cavity with the upper plate cavity, so that the molten metal can move and start from the connecting bridge cavity. Impact mixing occurs from the outer area to the inner area of ​​each cavity, effectively mixing different layers of molten metal staying in different cavities. At the same time, the shaping shell mold expands the range of the splicing part of the side plate connecting bridge, and provides a transfer part in the docking area so that the narrow end of the connecting bridge is below the docking part, and the side plate connecting bridge part is evenly cooled to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A casting device for a rear shell of a breaker hammer comprises an outer casting shell, two middle casting molds are arranged on the inner side of the outer casting shell, the two middle casting molds are molded together on the inner side of the outer casting shell, an upper casting mold for a side shell and a lower casting mold for a side shell are arranged on the outer side of the middle casting mold, the upper casting mold for the side shell and the lower casting mold for the side shell are molded together one above and one below on the side of the middle casting mold, a connecting bridge shaping module is arranged between the upper casting mold for the side shell and the lower casting mold for the side shell, the connecting bridge shaping module comprises a shaping shell mold, an outer edge shell mold, a docking cross plate and a Z-shaped partition plate, the shaping shell mold is molded together on the side of the middle casting mold through the outer edge shell mold, the docking cross plate and the Z-shaped partition plate There are two partitions in each mold. The two Z-shaped partitions are positioned one above and one below on the inner side of the forming shell mold through the two docking transverse plates. The two Z-shaped partitions separate the mold cavities to form a connecting bridge mold cavity, regionally separate the mold cavities and fill the separated mold cavities with molten metal. A molten metal release groove is formed between the docking transverse plate, the Z-shaped partition and the outer edge shell mold. The forming shell mold moves toward the middle casting mold to allow the molten metal release groove to connect the separated mold cavities. The molten metal release groove is used for the flow of molten metal in each mold cavity and the forming shell mold exerts force to control the impact and mixing of the molten metal, thereby balancing the molten metal entering each mold cavity in succession and moving the molten metal.

[0006] Furthermore, since the side shell upper mold, the side shell lower mold and the connecting bridge forming module are sequentially molded to the side of the middle mold, the side shell upper mold, the side shell lower mold and the inner side wall of the forming shell mold are fixedly connected with isolation plugs, and the isolation plugs are snap-connected to the side of the middle mold, so that the side shell upper mold and the side shell lower mold are molded to the side of the middle mold together with the connecting bridge forming module, the sides of the two middle molds are molded with the side shell upper mold, the side shell lower mold and the connecting bridge forming module, and at the same time, the two forming shell molds are molded to the inner side of the outer casting shell to form a mold matching the rear shell of the breaker.

[0007] Furthermore, since the upper mold of the side shell is separated from the lower mold of the side shell by the connecting bridge shaping module, an upper plate cavity is formed between the upper mold of the side shell and the middle mold, and a lower plate cavity is formed between the lower mold of the side shell and the middle mold. A special-shaped bridge cavity is provided on the surface of the middle mold to separate the cavities in the mold. Through the pouring gates on the upper mold of the side shell and the lower mold of the side shell, the molten metal can be poured into the separated cavities respectively. The special-shaped bridge cavity connects the lower plate cavity, the upper plate cavity and the The connecting bridge cavity guides the molten metal entering the lower plate cavity and the upper plate cavity into the special-shaped bridge cavity to cast a special-shaped bridge connecting the two side plates. The width of the connecting bridge cavity is twice the width of the lower plate cavity, so that the connecting bridge shaping module moves between the upper mold of the side shell and the lower mold of the side shell. After being tightly molded to the side of the middle mold, the connecting bridge cavity is adjusted to fit the lower plate cavity, so that the connecting bridge cavity accurately connects the upper plate cavity and the lower plate cavity to ensure the casting of the side plates.

[0008] Furthermore, since the connecting bridge shaping module is molded on the outside of the upper side shell mold and the lower side shell mold, the shaping shell mold is fixedly connected to the inner wall of the outer edge shell mold, and the outer edge shell mold is molded on the outside of the middle mold, the upper side shell mold and the lower side shell mold, the outer side walls of the upper side shell mold and the lower side shell mold are fixedly connected with a docking shell mold, and the outer edge shell mold is fixedly connected between the two docking shell molds, and the connecting bridge shaping module is positioned on the outside of the upper side shell mold and the lower side shell mold through the two docking shell molds.

[0009] Furthermore, the two docking transverse plates are respectively fixedly connected to the top and bottom of the shaping shell mold, and the two Z-shaped partitions are fixedly connected to the inner wall of the outer edge shell mold one above and one below, and the two Z-shaped partitions correspond to the two docking transverse plates, ensuring that the two Z-shaped partitions separate the connection area where the shaping shell mold docks the upper casting of the side shell and the lower casting of the side shell, so as to form the connecting bridge cavity and the molten metal release groove in a specified range and at a specified position.

[0010] Furthermore, two docking grooves corresponding to the Z-shaped partition are opened on the side of the middle casting mold, and the Z-shaped partition is snap-connected with the docking grooves to provide space for the moving Z-shaped partition to ensure that the molten metal release groove is gradually exposed into the connecting bridge cavity.

[0011] Furthermore, after the Z-shaped partition is docked to the side of the middle casting mold, the Z-shaped partition needs to close the docking groove and allow the side of the middle casting mold to maintain a flat surface. A cold iron block is fixedly connected to the inner side of the Z-shaped partition. The cold iron block is positioned in the docking groove following the Z-shaped partition to complete the closure of the docking groove and the adjustment of the side of the middle casting mold. A clearance groove is opened on the Z-shaped partition. The clearance groove allows the Z-shaped partition to stagger the isolation plug at the corresponding position to ensure normal mold closing of the connecting bridge shaping module.

[0012] Furthermore, the present invention also relates to a method for using a casting device for a rear shell of a breaker hammer, and the method for using is as follows:

[0013] S1, the two middle casting molds are molded together on the inner side of the outer casting shell, the upper casting mold of the side shell, the lower casting mold of the side shell and the shaping shell mold are molded together to the side of the middle casting mold, the outer casting shell, the middle casting mold, the upper casting mold of the side shell, the lower casting mold of the side shell and the connecting bridge shaping module cooperate to form a breaker rear shell casting mold, and at the same time separate the casting mold cavity to form the lower plate cavity, the upper plate cavity, the special-shaped bridge cavity and the connecting bridge cavity;

[0014] S2, pouring molten metal into the mold cavity from the casting pieces on the upper mold of the side shell and the lower mold of the side shell, and the molten metal enters the separated lower plate cavity, the upper plate cavity and the special-shaped bridge cavity, so that the molten metal intermittently fills the lower plate cavity, the upper plate cavity and the special-shaped bridge cavity;

[0015] S3. The outer side of the shaping shell mold is subjected to force, and the shaping shell mold is controlled by the outer edge shell mold that is deformed at the tail end. The two shaping shell molds are moved between the upper mold of the side shell and the lower mold of the side shell to approach the middle mold through the guidance of the outer casting shell. The outer edge shell mold applies pressure from the outside of the middle mold to push the molten metal in the special-shaped bridge cavity. The molten metal release groove is gradually exposed in the cavity to connect the lower plate cavity with the upper plate cavity, so that the molten metal in each cavity is active and controlled by the shaping shell mold to impact and mix the molten metal from the connecting bridge cavity to each cavity, and the molten metal is mixed, and the molten metal that enters and fills each cavity in turn is balanced, and the side plate connecting bridge part is evenly cooled to cool the rear shell of the forming hammer.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention sets a separated upper side shell mold and a lower side shell mold, and molds the connecting bridge shaping module together to the side of the middle mold to form a breaker hammer rear shell mold. The upper and lower Z-shaped partitions separate the mold cavity, so as to achieve the effect of regionally separating the cavity and filling the separated cavity with molten metal. The shaping shell mold is controlled by the outer edge shell mold deformed at the tail end to move close to the middle mold. The outer edge shell mold exerts pressure from the outside of the middle mold to push the molten metal in the special-shaped bridge cavity, guides a certain amount of molten metal to the connecting bridge cavity, and the molten metal release groove gradually emerges from the cavity to connect the lower The lower plate cavity and the upper plate cavity allow the molten metal in each cavity to move. At the same time, starting from the connecting bridge cavity, impact mixing occurs from the outer area to the inner area of ​​each cavity, achieving the effect of mixing the molten metal that enters and stays in different layers in different cavities, and effectively mixing the molten metal. At the same time, the shaping shell mold expands the range of the splicing part of the side plate connecting bridge, provides a transfer part in the docking area, so that the narrow end of the connecting bridge is below the docking part, and accelerates the cooling of the transfer part near the narrow end of the connecting bridge, and evenly cools the side plate connecting bridge part, thereby improving the casting effect of the breaker shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution in the embodiment, the drawings in the embodiment are briefly introduced below.

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the casting mold in the present invention;

[0022] Figure 4 It is a schematic diagram of the partially separated structure of the present invention;

[0023] Figure 5 It is another schematic diagram of the partially separated structure of the present invention;

[0024] In the figure: 1. outer casting shell; 2. middle casting mold; 21. upper casting mold of side shell; 22. lower casting mold of side shell; 23. lower plate cavity; 24. upper plate cavity; 25. special-shaped bridge cavity; 26. docking groove; 3. connecting bridge shaping module; 31. shaping shell mold; 32. outer edge shell mold; 33. docking cross plate; 34. Z-shaped partition; 341. cold iron block; 342. give way groove; 35. molten metal release groove; 4. connecting bridge cavity; 5. docking shell mold; 6. isolation plug. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solution in the embodiment of the present invention in conjunction with the accompanying drawings in the embodiment of the present invention. Figures 1 to 5 The detailed description of the structure will clearly show that the structural contents mentioned in the following embodiments are all based on the drawings in the specification.

[0026] See also Figure 1 to Figure 5 In an embodiment of the present invention, a casting device for a rear shell of a breaker hammer comprises an outer casting shell 1, two middle casting molds 2 are arranged on the inner side of the outer casting shell 1, and the two middle casting molds 2 are molded together on the inner side of the outer casting shell 1. A side shell upper casting mold 21 and a side shell lower casting mold 22 are arranged on the outer side of the middle casting mold 2, and the side shell upper casting mold 21 and the side shell lower casting mold 22 are molded together on the side of the middle casting mold 2 one above and one below, and a connecting bridge shaping module 3 is arranged between the side shell upper casting mold 21 and the side shell lower casting mold 22, and the connecting bridge shaping module 3 comprises a shaping shell mold 31, an outer edge shell mold 32, a docking cross plate 33 and a Z-shaped partition plate 34, and the shaping shell mold 31 is molded together on the side of the middle casting mold 2 through the outer edge shell mold 32, and the docking cross plate 33 and the Z-shaped partition plate 34 are provided. There are two Z-shaped partitions 33 and two Z-shaped partitions 34, which are positioned one above and one below on the inner side of the forming shell mold 31 through two docking cross plates 33. The two Z-shaped partitions 34 separate the cavities to form a connecting bridge cavity 4, which regionally separates the cavities and fills the separated cavities with molten metal. A molten metal release groove 35 is formed between the docking cross plates 33, the Z-shaped partitions 34 and the outer edge shell mold 32. The forming shell mold 31 moves toward the middle casting mold 2 to allow the molten metal release groove 35 to connect the separated cavities. The molten metal release groove 35 is used to flow the molten metal in each cavity and the forming shell mold 31 applies force to control the impact and mixing of the molten metal, so as to balance the molten metal entering each cavity in turn and activate the molten metal.

[0027] The outer casting shell 1 is fixed in the construction area by external fixings. The outer casting shell 1 connects the two middle casting molds 2 from the outside. The two middle casting molds 2 are molded together on the inside of the outer casting shell 1 to position the middle casting mold 2 in the construction area, and the docking area of ​​the two middle casting molds 2 is closed from the outside. The outer side of the middle casting mold 2 is provided with a side shell upper casting mold 21 and a side shell lower casting mold 22. The side shell upper casting mold 21 and the side shell lower casting mold 22 are molded together on the side of the middle casting mold 2 one above and one below. A connecting bridge shaping module 3 is provided between the side shell upper casting mold 21 and the side shell lower casting mold 22. The connecting bridge shaping module 3 is composed of a shaping shell mold 31, an outer edge shell mold 32, a docking cross plate 33 and a Z-shaped partition 34. The shaping shell mold 31 is used to connect the side shell upper casting mold 21 and the side shell lower casting mold 22. The connecting bridge shaping module 3 is driven by the upper side shell mold 21 and the lower side shell mold 22, and is molded to the side of the middle mold 2 in sequence with the upper side shell mold 21 and the lower side shell mold 22. The inner walls of the upper side shell mold 21, the lower side shell mold 22 and the shaping shell mold 31 are fixedly connected with an isolation plug 6, and a matching plugging groove corresponding to the isolation plug 6 is opened on the side of the middle mold 2. The isolation plug 6 is snap-connected in the corresponding matching plugging groove on the side of the middle mold 2, so that the upper side shell mold 21 and the lower side shell mold 22 are molded to the side of the middle mold 2 with the connecting bridge shaping module 3. The sides of the two middle castings 2 are molded with the upper side shell casting 21, the lower side shell casting 22 and the connecting bridge forming module 3, and at the same time, the two forming shell molds 31 are molded to the inner side of the outer casting shell 1 to form a casting that matches the rear shell of the breaker hammer, which is conducive to the mold closing operation of the various casting components.

[0028] The shaping shell mold 31 is fixedly connected to the inner wall of the outer edge shell mold 32. After the shaping shell mold 31 is molded on the outer sides of the side shell upper mold 21 and the side shell lower mold 22, the outer edge shell mold 32 is molded on the outer sides of the middle mold 2, the side shell upper mold 21 and the side shell lower mold 22. The outer side walls of the side shell upper mold 21 and the side shell lower mold 22 are fixedly connected with a docking shell mold 5. The outer edge shell mold 32 is fixedly connected between the two docking shell molds 5. The two docking shell molds 5 can be used to position the connecting bridge shaping module 3 on the outer sides of the side shell upper mold 21 and the side shell lower mold 22. There are two docking transverse plates 33 and two Z-shaped partitions 34. The two docking transverse plates 33 are fixedly connected to the top and bottom of the shaping shell mold 31 respectively. The two Z-shaped partitions 34 are fixedly connected to the inner side wall of the outer shell mold 32 one above and one below, and the two docking transverse plates 33 and the two Z-shaped partitions 34 are stably connected to the inner side of the shaping shell mold 31. The two Z-shaped partitions 34 correspond to the two docking transverse plates 33, so that the two Z-shaped partitions 34 are positioned one above and one below on the inner side of the shaping shell mold 31 through the two docking transverse plates 33. The positioned two Z-shaped partitions 34 separate the connection area of ​​the shaping shell mold 31 where the upper casting mold 21 of the side shell is docked with the lower casting mold 22 of the side shell, so as to form a connecting bridge cavity 4 and a molten metal release groove 35 in a specified range and at a specified position.

[0029] The upper mold 21 of the side shell is separated from the lower mold 22 of the side shell by the connecting bridge shaping module 3. An upper plate cavity 24 is formed between the upper mold 21 of the side shell and the middle mold 2. A lower plate cavity 23 is formed between the lower mold 22 of the side shell and the middle mold 2. A special-shaped bridge cavity 25 is provided on the surface of the middle mold 2 to separate the cavities in the mold. Through the fixed gates on the upper mold 21 of the side shell and the lower mold 22 of the side shell, the molten metal can be poured into each separated cavity respectively, achieving the effect of regionally separating the cavities and filling the separated cavities with molten metal. The special-shaped bridge cavity 25 connects the lower plate cavity 23, the upper plate cavity 24 and the connecting bridge cavity 4, and can guide the molten metal entering the lower plate cavity 23 and the upper plate cavity 24 into the special-shaped bridge cavity 25 to cast a special-shaped bridge connecting the two side plates. The width of the connecting bridge cavity 4 is twice the width of the lower plate cavity 23, so that the connecting bridge shaping module 3 moves between the upper mold 21 of the side shell and the lower mold 22 of the side shell, and after being tightly molded to the side of the middle mold 2, the connecting bridge cavity 4 is adjusted to fit the lower plate cavity 23, so that the connecting bridge cavity 4 accurately connects the upper plate cavity 24 and the lower plate cavity 23 to ensure the casting of the side plate. A metal liquid release groove 35 is formed between the docking cross plate 33, the Z-shaped partition plate 34 and the outer edge shell mold 32. The shaping shell mold 31 moves toward the middle mold 2, so that the metal liquid release groove 35 can be gradually exposed to the connecting bridge cavity 4 to connect the separated lower plate cavity 23 and the upper plate cavity 24. The metal liquid release groove 35 allows the metal liquid in each cavity to flow, so that the metal liquid in each cavity can be mixed through the metal liquid release groove 35. At the same time, when the metal liquid release groove 35 is exposed into the connecting bridge cavity 4, the shaping shell mold 31 exerts force to control the flowing metal liquid to produce impact and mixing, balance the metal liquid entering each cavity successively and mix the metal liquid actively.

[0030] The side of the middle mold 2 is provided with two docking grooves 26 corresponding to the Z-shaped partition 34. The Z-shaped partition 34 is connected with the docking groove 26 by snapping, providing a clearance space for the moving Z-shaped partition 34 to ensure that the metal liquid release groove 35 is gradually exposed in the connecting bridge cavity 4. After the Z-shaped partition 34 is docked to the side of the middle mold 2, the Z-shaped partition 34 needs to close the docking groove 26 and keep the side of the middle mold 2 flat. The inner side of the Z-shaped partition 34 is fixedly connected with a cold iron block 341. The cold iron block 341 is positioned in the docking groove 26 following the Z-shaped partition 34 to complete the closure of the docking groove 26. The outer wall of the cold iron block 341 is flush with the side of the middle mold 2, achieving the effect of adjusting the side of the middle mold 2. The Z-shaped partition 34 is provided with a clearance groove 342, which allows the Z-shaped partition 34 to stagger the isolation plug 6 at the corresponding position to ensure that the connecting bridge shaping module 3 is normally molded.

[0031] The connecting bridge shaping module 3 is controlled by the separated side shell upper mold 21 and the side shell lower mold 22, and is molded together with the side shell upper mold 21 and the side shell lower mold 22 to the side of the middle mold 2, which is beneficial to shaping the rear shell mold of the breaker hammer. The upper and lower Z-shaped partitions 34 separate the mold cavities. The molten metal is poured into the separated cavities through the fixed gates on the side shell upper mold 21 and the side shell lower mold 22, which is beneficial to the intermittent pouring and filling of the molten metal, allowing the molten metal to fill the lower plate cavity 23, the upper plate cavity 24 and the special-shaped bridge cavity 25 respectively. The outer side of the shaping shell mold 31 is subjected to force, and the shaping shell mold 31 is controlled by the outer edge shell mold 32 deformed at the tail end to move close to the middle mold 2. The Z-shaped partition 34 is clamped inside the docking groove 26, and the isolation plug 6 on the shaping shell mold 31 is clamped in the matching plugging groove on the side of the middle mold 2, which is conducive to adjusting the position of the shaping shell mold 31 on the side of the middle mold 2 and tightly clamping the shaping shell mold 31 on the side of the middle mold 2. The outer edge shell mold 32 is clamped to the inner side of the outer casting shell 1 and presses the molten metal in the special-shaped bridge mold cavity 25 from the outer side of the middle mold 2, which plays the role of pressing the molten metal in the special-shaped bridge mold cavity 25 from the outer side of the middle mold 2, and can introduce excess molten metal into the connecting bridge mold cavity 4, so that a certain amount of molten metal is pre-entered into the connecting bridge mold cavity 4 to ensure that the molten metal of each cavity is subsequently mixed and filled into the entire cavity. The molten metal release groove 35 is gradually exposed to the connecting bridge cavity 4 during the movement of the shaping shell mold 31 to connect the lower plate cavity 23 and the upper plate cavity 24, so that the molten metal in each cavity can be moved. The shaping shell mold 31 applies force to control the molten metal to start from the connecting bridge cavity 4 and impact and mix from the outer area to the inner area of ​​each cavity, thereby achieving the effect of mixing the molten metal that enters and stays in different layers in different cavities, and effectively mixing the molten metal. The shaping shell mold 31 expands the range of the splicing part of the side plate connecting bridge, provides a transfer part in the docking area so that the narrow end of the connecting bridge is below the docking part, and accelerates the cooling of the transfer part near the narrow end of the connecting bridge, and evenly cools the side plate connecting bridge part, thereby improving the casting effect of the breaker shell.

[0032] The working principle of the present invention is as follows: two middle molds 2 are molded together on the inner side of the outer casting shell 1, and the isolation plugs 6 on the upper mold 21 of the side shell, the lower mold 22 of the side shell and the shaping shell mold 31 are respectively aligned and clamped on the side of the middle mold 2, and the upper mold 21 of the side shell, the lower mold 22 of the side shell and the shaping shell mold 31 are molded together on the side of the middle mold 2 to form a crushing hammer rear shell mold, and the molten metal is poured into the mold cavity from the casting parts on the upper mold 21 of the side shell and the lower mold 22 of the side shell, and the molten metal enters the separated lower plate cavity 23, the upper plate cavity 24 and the special-shaped bridge cavity 25, so that the molten metal intermittently fills the lower plate cavity 23, the upper plate cavity 24 and the special-shaped bridge cavity 25. The outer side of the shaping shell mold 31 is forced to move to adjust the position and tightly fix it to the side of the middle casting mold 2. The outer edge shell mold 32 moves with the shaping shell mold 31 and applies pressure from the outer side of the middle casting mold 2 to push the molten metal in the special-shaped bridge cavity 25, so that a certain amount of molten metal can enter the connecting bridge cavity 4 in advance. The molten metal release groove 35 is gradually exposed to the connecting bridge cavity 4, and the lower plate cavity 23 and the upper plate cavity 24 are connected to allow the molten metal in each cavity to move. At the same time, the molten metal starts to impact and mix with each cavity from the connecting bridge cavity 4, and the molten metal is mixed to evenly enter and fill each cavity, evenly cool the side plate connecting bridge part, and cool the rear shell of the forming breaker.

[0033] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A casting device for a rear shell of a breaker hammer, comprising an outer casting shell (1), wherein two middle casting molds (2) are arranged inside the outer casting shell (1), and the two middle casting molds (2) are molded together inside the outer casting shell (1), characterized in that The outer side of the middle casting mold (2) is provided with a side shell upper casting mold (21) and a side shell lower casting mold (22), the side shell upper casting mold (21) and the side shell lower casting mold (22) are molded one above the other on the side of the middle casting mold (2), and a connecting bridge shaping module (3) is provided between the side shell upper casting mold (21) and the side shell lower casting mold (22), and the connecting bridge shaping module (3) comprises a shaping shell mold (31), an outer edge shell mold (32), a docking transverse plate (33) and a Z-shaped partition plate ( 34), the shaping shell mold (31) is molded on the side of the middle casting mold (2) through the outer edge shell mold (32), the number of the docking transverse plate (33) and the number of the Z-shaped partition plates (34) are both two, and the two Z-shaped partition plates (34) are positioned on the inner side of the shaping shell mold (31) one above and one below through the two docking transverse plates (33), and the two Z-shaped partition plates (34) separate the mold cavities to form a connecting bridge mold cavity (4), regionally separate the mold cavities and fill the separated mold cavities with mold liquid; A molten metal release groove (35) is formed between the docking transverse plate (33), the Z-shaped partition plate (34) and the outer edge shell mold (32); the shaping shell mold (31) moves toward the middle casting mold (2) to allow the molten metal release groove (35) to communicate with the separated cavities; the molten metal release groove (35) allows the molten metal in each cavity to flow, and the shaping shell mold (31) applies force to control the impact and mixing of the molten metal, thereby balancing the molten metal that enters each cavity in sequence and moving the molten metal; An upper plate cavity (24) is formed between the upper side shell mold (21) and the middle mold (2), and a lower plate cavity (23) is formed between the lower side shell mold (22) and the middle mold (2). A special-shaped bridge cavity (25) is provided on the surface of the middle mold (2). The special-shaped bridge cavity (25) connects the lower plate cavity (23), the upper plate cavity (24) and the connecting bridge cavity (4). The width of the connecting bridge cavity (4) is twice the width of the lower plate cavity (23).

2. The casting device for the rear housing of a breaker hammer according to claim 1, characterized in that: The side shell upper casting mold (21), the side shell lower casting mold (22) and the inner side wall of the shaping shell mold (31) are all fixedly connected with an isolation plug (6), and the isolation plug (6) is snap-connected to the side of the middle casting mold (2).

3. The casting device for the rear housing of a breaker hammer according to claim 1, characterized in that: The shaping shell mold (31) is fixedly connected to the inner side wall of the outer edge shell mold (32); the outer edge shell mold (32) is molded on the outside of the middle mold (2), the side shell upper mold (21) and the side shell lower mold (22); the outer side walls of the side shell upper mold (21) and the side shell lower mold (22) are both fixedly connected to a docking shell mold (5); and the outer edge shell mold (32) is fixedly connected between the two docking shell molds (5).

4. The casting device for the rear housing of a breaker hammer according to claim 1, characterized in that: The two docking transverse plates (33) are respectively fixedly connected to the top and bottom of the shaping shell mold (31), and the two Z-shaped partition plates (34) are fixedly connected to the inner side wall of the outer edge shell mold (32) one above and one below, and the two Z-shaped partition plates (34) correspond to the two docking transverse plates (33).

5. The casting device for the rear housing of a breaker hammer according to claim 1, characterized in that: Two docking grooves (26) corresponding to the Z-shaped partitions (34) are provided on the side of the middle casting mold (2), and the Z-shaped partitions (34) are snap-fitted and connected to the docking grooves (26).

6. The casting device for the rear housing of a breaker hammer according to claim 1, characterized in that: A cold iron block (341) is fixedly connected to the inner side of the Z-shaped partition (34), and a clearance groove (342) is provided on the Z-shaped partition (34).

7. A casting device for a rear housing of a breaker hammer according to any one of claims 1 to 6, characterized in that: The method of using the casting device is as follows: S1, the two middle casting molds (2) are molded together on the inner side of the outer casting shell (1), the side shell upper casting mold (21), the side shell lower casting mold (22) and the shaping shell mold (31) are molded together on the side of the middle casting mold (2), the outer casting shell (1), the middle casting mold (2), the side shell upper casting mold (21), the side shell lower casting mold (22) and the connecting bridge shaping module (3) cooperate to form a breaker rear shell casting mold, and at the same time separate the casting mold cavity to form the lower plate cavity (23), the upper plate cavity (24), the special-shaped bridge cavity (25) and the connecting bridge cavity (4); S2, pouring molten metal into the mold cavity through the pouring parts on the upper mold (21) of the side shell and the lower mold (22) of the side shell, and the molten metal enters the separated lower plate cavity (23), the upper plate cavity (24) and the special-shaped bridge cavity (25), so that the molten metal intermittently fills the lower plate cavity (23), the upper plate cavity (24) and the special-shaped bridge cavity (25); S3, the outer side of the shaping shell mold (31) is subjected to force, and the shaping shell mold (31) is controlled by the outer edge shell mold (32) that is deformed at the tail end. The two shaping shell molds (31) are moved between the upper mold (21) of the side shell and the lower mold (22) of the side shell to approach the middle mold (2) through the guidance of the outer casting shell (1). The outer edge shell mold (32) applies pressure from the outside of the middle mold (2) to push the molten metal in the special-shaped bridge cavity (25). The molten metal release groove (35) is gradually exposed in the cavity to connect the lower plate cavity (23) and the upper plate cavity (24), so that the molten metal in each cavity is moved and controlled by the shaping shell mold (31) to impact and mix the molten metal from the connecting bridge cavity (4) to each cavity, so as to perform a mixing process of the molten metal, evenly enter and fill each cavity, evenly cool the side plate connecting bridge part, and cool and form the rear shell of the breaker.

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