CN114918383A

CN114918383A - Flywheel housing casting die utensil

Info

Publication number: CN114918383A
Application number: CN202210826481.6A
Authority: CN
Inventors: 姜喜涛; 史训鹏; 覃长城; 胡林
Original assignee: Ningbo Yitailai Moulds Co ltd
Current assignee: Ningbo Yitailai Moulds Co ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2022-08-19
Anticipated expiration: 2042-07-14
Also published as: CN114918383B

Abstract

The application discloses a flywheel casing casting mold which comprises an upper mold, a lower mold and a demolding mechanism, wherein an upper mold core is installed at the lower end of the upper mold, a lower mold core is installed at the upper end of the lower mold, and the upper mold core and the lower mold core are matched with each other to form a cavity for casting a flywheel casing; the upper mold core comprises two symmetrically arranged mold core groups, and the mold core groups are suitable for being matched with the lower mold core to form the mounting grooves; the demoulding mechanism is arranged on the upper die; when demoulding is carried out, the upper die drives the formed flywheel shell to move upwards relative to the lower die; meanwhile, the demolding mechanism is adapted to perform a demolding process including a first process and a second process in sequence. The beneficial effect of this application: the demoulding mechanism can drive the core assembly to move upwards in the direction perpendicular to the inclined plane of the mounting groove until the core assembly is separated from the formed mounting groove, so that interference-free demoulding of the flywheel shell is realized, the quality of the formed flywheel shell is improved, and the service life of the mould is prolonged.

Description

Flywheel housing casting die utensil

Technical Field

The application relates to the field of automobile part production, in particular to a flywheel housing casting mold.

Background

The flywheel housing can be used for coupling an engine and a gearbox of an automobile, bearing part of the weight of the engine and the gearbox, and protecting the clutch and the flywheel. The flywheel housing is an important supporting part of the engine, and the processing quality of the flywheel housing directly influences the performance of the engine. Meanwhile, the flywheel shell is complex in structure and poor in rigidity, and belongs to parts difficult to machine.

When the engine is started and drives the flywheel to rotate, the flywheel shell receives the impact force of the flywheel along the radial direction. Fig. 1 is a schematic structural diagram of a flywheel housing 100 in the prior art; the inner cavity end face of the flywheel housing 100 is symmetrically provided with two sets of mounting grooves according to the mounting requirement, and each set of mounting groove comprises a first mounting groove 110, a second mounting groove 120 and a third mounting groove 130. Thus, when the engine is started, the first mounting groove 110, the second mounting groove 120 and the third mounting groove 130 belong to weak stress positions of the flywheel housing. Therefore, as shown in fig. 2 and fig. 3, the first protruding rib 101 and the second protruding rib 102 are vertically staggered on the bottom slopes of the first mounting groove 110, the second mounting groove 120 and the third mounting groove 130, so as to improve the supporting strength of the flywheel housing at the positions of the first mounting groove 110, the second mounting groove 120 and the third mounting groove 130, and further realize the lightweight production of the flywheel housing.

The existing flywheel shell casting mold generally realizes demolding of the flywheel shell directly through vertical separation of an upper mold and a lower mold; however, since the extending direction of the second rib 102 is perpendicular to the demolding direction, the second rib 102 and the mold generate an interference length with a projection distance t in the demolding direction; the second convex rib 102 and the die are easily abraded by adopting the existing forced demoulding, so that the production quality of the flywheel shell is influenced, and the service life of the die is shortened.

Therefore, a casting mold capable of improving the production quality of the flywheel housing is urgently needed.

Disclosure of Invention

The application aims to provide a casting die capable of improving the production quality and the service life of a flywheel shell.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: a flywheel housing casting mold comprises an upper mold, a lower mold and a demolding mechanism, wherein an upper mold core is installed at the lower end of the upper mold, a lower mold core is installed at the upper end of the lower mold, and the upper mold core and the lower mold core are matched with each other to form a cavity for casting a flywheel housing; the upper die core comprises two symmetrically arranged core groups, and the core groups are suitable for being matched with the lower die core to form mounting grooves of the flywheel shell; the demolding mechanism is arranged on the upper die; when demoulding is carried out, the upper die drives the formed flywheel housing to move upwards relative to the lower die; meanwhile, the demolding mechanism is adapted to sequentially perform a demolding process including a first process and a second process; wherein the first process: the demolding mechanism is suitable for driving the mold core group to move upwards in a direction vertical to the inclined plane of the mounting groove until the mold core group is separated from the formed mounting groove; the second process: the demolding mechanism is suitable for driving the formed flywheel shell to move downwards to be separated from the upper mold core, so that interference-free demolding of the flywheel shell is realized, the quality of the formed flywheel shell is improved, and the service life of the mold is prolonged.

Preferably, the upper mold core further comprises a base mold core; the core group is detachably arranged on the base core and comprises a first core, a second core and a third core; the first core and the third core are of the same structure and are used for respectively forming a first mounting groove and a third mounting groove, and the second core is used for forming a second mounting groove; the demolding mechanism is respectively connected with the first mold core and the third mold core through a first ejector rod, and is connected with the second mold core through a second ejector rod; when the first process is carried out, the demolding mechanism respectively drives the core group to synchronously move upwards in a direction perpendicular to the inclined plane of the corresponding installation groove through the vertical upwards movement of the first ejector rod and the second ejector rod.

Preferably, a second mounting cavity is arranged on the base mold core; the second mold core is slidably mounted in the second mounting cavity; the second core comprises a second base block and a second traction block; the bottom of the second base block is a second forming block, and the bottom of the second traction block is a third forming block; the inclined plane of the second forming block is provided with a plurality of first forming grooves and a plurality of second forming grooves, and the inclined plane of the third forming block is provided with a plurality of third forming grooves; a second sliding cavity is formed in one side of the second base block, the other side of the second base block is matched with the second installation cavity through a guide structure, the second traction block is matched with the second sliding cavity, and meanwhile the second traction block is connected with the second ejector rod; when the second core is cast, the second forming block and the third forming block are matched with each other to extend out of the second mounting cavity, the first convex rib is formed through the alignment and matching of the first forming groove and the third forming groove, and the first convex rib is formed through the second forming groove; when the first process is carried out, the second traction block is suitable for being driven by the upward movement of the second ejector rod to contract in the second sliding cavity, and the second traction block is propped against the second sliding cavity to drive the second base block to move upward in the direction vertical to the inclined plane of the second forming block through the guide structure, so that the second forming groove can be perfectly separated from the second convex rib.

Preferably, a first spring is mounted at the top of the second mounting cavity, and the first spring is abutted and matched with the top of the second base block; the guide structure comprises a positioning block and a positioning groove which are in sliding fit with each other, and the matching sliding direction of the positioning block and the positioning groove is vertical to the bottom inclined plane of the second forming block; the positioning block is arranged on the second base block, and the positioning groove is arranged in the second installation cavity; or the positioning block is arranged in the second mounting cavity, and the positioning groove is arranged in the second base block; when the second traction block drives the second base block to move synchronously through the abutting of the second traction block and the second sliding cavity, the second base block is suitable for sliding through the matching of the positioning block and the positioning groove, moving upwards along the inclination of the first inclined plane and compressing the first spring.

Preferably, a first mounting cavity is arranged on the base core; the first mold core comprises a first base block, a first traction block and a molding module; the first base block is fixedly connected with the first installation cavity; a first sliding cavity is formed in the first base block, a first forming block is arranged at the bottom of the first base block, a plurality of forming convex blocks are arranged on the inclined surface of the first forming block, a communicating groove communicated with the first sliding cavity is formed between every two adjacent forming convex blocks, and the opening direction of the communicating groove is perpendicular to the inclined surface of the first forming block; the molding module is slidably mounted in the first sliding cavity and matched with the communicating groove; the first traction block is slidably arranged in the first sliding cavity and is connected with the first traction block through a driving structure, and the first traction block is also connected with the first ejector rod; when casting is carried out, the molding module is suitable for extending out of the communicating groove and is matched with the molding lug to mold a second convex rib; when carrying out first process, first traction block is suitable for along with first ejector pin shifts up, and then passes through drive structure is in order to order about the shaping module follows the slip of intercommunication groove to guarantee when the second process, first mounting groove can noninterference carry out the drawing of patterns.

Preferably, the forming module comprises a plurality of forming modules and a connecting block; the length of each molding module is different so as to be matched with the second convex ribs with different sizes in the first mounting groove; the driving structure comprises a driving groove and a driving block, and the opening direction of the driving groove and the extending direction of the driving block are both parallel to the inclined plane of the first forming block; the driving groove is formed in the first traction block, and the driving block is arranged on the connecting block; or the driving groove is arranged on the connecting block, and the driving block is arranged on the first traction block; when casting is carried out, each forming module is suitable for extending out of the corresponding communication groove so as to form second convex ribs with different sizes; when the first process is carried out, the driving groove is matched with the driving block, so that the traction force of the first traction block on the forming module is converted from the vertical direction to the direction perpendicular to the bottom inclined plane of the first base block.

Preferably, the top of the first traction block is elastically connected with the first base block through a second spring; the upper part of the first traction block is provided with a connecting groove, and the bottom of the connecting groove is provided with a clamping groove communicated with the connecting groove along the circumferential direction; a through hole aligned with the connecting groove is formed in the first base block, a guide groove is formed in the side wall of the through hole and comprises an inclined section and a vertical section; a clamping block is arranged at the lower end of the first ejector rod, and a guide block is arranged at the lower part of the first ejector rod; the second spring is always in a stretching state; when casting is carried out, the first ejector rod penetrates through the through hole to be connected with the connecting groove, so that the clamping block is matched with the clamping groove; when the first process is carried out, the first ejector rod drives the first traction block to synchronously move upwards and simultaneously rotates through the sliding of the guide block along the guide groove until the clamping block is disengaged from the clamping groove, and the first ejector rod moves upwards relative to the first traction block so as to avoid the phenomenon that the demoulding mechanism has overlarge stroke to interfere with the demoulding of the first core.

Preferably, the demolding mechanism comprises a driving plate, a first demolding assembly and a plurality of second demolding assemblies; the driving plate is slidably mounted on the upper die, the first demolding assembly is used for demolding the core set, and the second demolding assembly is used for demolding the flywheel shell; the driving plate is connected with the first demolding assembly through a reversing assembly, and the driving plate is connected with the second demolding assembly; when the driving plate moves downwards to perform demoulding, in the first process, the first demoulding assembly vertically moves upwards through the reversing assembly to drive the die core group to move upwards in the direction vertical to the inclined plane of the mounting groove; in the second process, the second demolding component separates the extruded flywheel shell from the upper mold core through downward movement of the driving plate.

Preferably, the first demoulding assembly comprises a sliding plate, the first ejector rod and the second ejector rod; the sliding plate is slidably mounted on the upper die, and the first ejector rod and the second ejector rod are fixedly connected with the sliding plate; the reversing assembly comprises a first rack plate, a gear and a second rack plate; the first rack plate is vertically arranged on the driving plate, the gear is rotatably arranged on the upper die, and the second rack plate is vertically arranged on the sliding plate; the first rack plate and the second rack plate are respectively meshed with two sides of the gear; when the first process is carried out, the driving plate drives the sliding plate to drive the first ejector rod and the second ejector rod to vertically move upwards by driving the first rack plate to move downwards.

Preferably, the upper die is provided with a plurality of vertical sliding holes; a sliding groove is vertically formed in the side wall of the lower part of the sliding hole; the second demolding assembly comprises an upper ejector rod, a lower ejector rod and a stop block; the upper ejector rod is fixedly connected with the drive plate and is in sliding fit with the slide hole; the lower ejector rod is slidably mounted on the upper mold core through a third spring, the upper ejector rod is aligned with the lower ejector rod, and the size of the upper end of the lower ejector rod is larger than that of the lower end of the upper ejector rod; the stop block is slidably arranged in the chute through a fourth spring; when casting is carried out, the first end of the stop block extends into the sliding hole under the elastic force of the fourth spring, so that the lower ejector rod is abutted and matched with the first end of the stop block under the elastic force of the third spring; meanwhile, the lower end of the upper ejector rod and the upper end of the lower ejector rod are arranged at intervals; when the first process is carried out, the lower ejector rod moves downwards along with the driving plate until the lower ejector rod is extruded with the inclined surface of the first end of the stop block, and then the lower ejector rod is contacted with the upper end of the lower ejector rod; when the second process is performed, the lower carrier rod is adapted to perform a synchronous downward movement for compressing the third spring according to the compression of the upper carrier rod.

Compared with the prior art, the beneficial effect of this application lies in:

when carrying out the drawing of patterns, drive the core through demoulding mechanism and organize and carry out shifting up of perpendicular to mounting groove inclined plane direction, separate the core group with fashioned mounting groove to realize the non-interference drawing of patterns of flywheel shell, and then improve the quality of fashioned flywheel shell and improve the life of mould.

Drawings

Fig. 1 is a schematic structural diagram of a flywheel housing in the prior art.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a schematic structural view of the second rib in the mounting groove in fig. 2.

Fig. 4 is a schematic view of the overall structure of the present invention.

Fig. 5 is an exploded view of the upper mold core according to the present invention.

Fig. 6 is a schematic view showing an exploded state of a second core according to the present invention.

FIG. 7 is a schematic view showing a state in which the second core is molded according to the present invention.

FIG. 8 is a schematic view showing a state where the second core is released from the mold in the present invention.

Fig. 9 is a schematic view showing an exploded state of a first core according to the present invention.

Fig. 10 is a schematic structural view of a first base block in the present invention.

Fig. 11 is a schematic structural view of a first traction block according to the present invention.

FIG. 12 is a schematic view of a molding module according to the present invention.

Fig. 13 is a schematic view showing a state in which the first core is molded in the present invention.

Fig. 14 is a schematic view showing a state in which the first core is demolded in the present invention.

Fig. 15 is a schematic structural view of the first lift pin of the present invention.

Fig. 16 is a schematic view showing the movement of the first carrier pin during the demolding of the first core according to the present invention.

Fig. 17 is a schematic view of an installation structure of the ejector mechanism of the present invention.

Fig. 18 is an enlarged view of the invention at detail B of fig. 17.

Fig. 19 is an enlarged view of the invention at section C of fig. 17.

In the figure: the flywheel housing 100, the first mounting groove 110, the second mounting groove 120, the third mounting groove 130, the first rib 101, the second rib 102, the upper die 2, the sliding hole 210, the sliding groove 220, the lower die 3, the upper die core 4, the first forming groove 4001, the second forming groove 4002, the third forming groove 4003, the forming protrusion 4004, the forming groove 4005, the forming module 4006, the base core 41, the first mounting cavity 411, the second mounting cavity 412, the positioning groove 4121, the first inclined surface 4122, the third mounting cavity 413, the first core 42, the first base block 421, the first sliding cavity 4210, the first forming block 4211, the communicating groove 4212, the through hole 4213, the guide groove 4214, the first traction block 422, the driving groove 4220, the extrusion surface 4221, the top block 4222, the connecting groove 4223, the clamping groove 4225, the forming module 423, the connecting block 4231, the driving block 4232, the second core 43, the second base block 4310, the second sliding cavity 4310, the second positioning block 4311, the second positioning block 4313, the second inclined surface 43431, the second inclined surface 4313, the connecting groove 4213, the connecting block 4225, the connecting groove 4231, the connecting block 43431, the connecting block 4310, the connecting block 43431, the connecting block 4311, and the connecting groove 43431, The demolding device comprises a second traction block 432, a third molding block 4321, a third core 44, a lower core 5, a demolding mechanism 6, a driving plate 61, a first rack plate 611, a gear 612, a first demolding assembly 62, a sliding plate 621, a first ejector rod 622, a fixture block 6221, a guide block 6222, a second ejector rod 623, a second rack plate 624, a second demolding assembly 63, an upper ejector rod 631, a lower ejector rod 632, a stop 633, a first spring 710, a second spring 720, a third spring 730 and a fourth spring 740.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments described below or between the technical features may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In one preferred embodiment of the present application, as shown in fig. 4 to 19, a flywheel housing casting mold comprises an upper mold 2, a lower mold 3 and a demolding mechanism 6. An upper mold core 4 is installed at the lower end of the upper mold 2, a lower mold core 5 is installed at the upper end of the lower mold 3, and the upper mold core 4 and the lower mold core 5 are matched with each other to form a cavity for casting the flywheel housing 100. And the upper mold core 4 comprises two symmetrically arranged mold core groups, and in the casting process, the mold core groups can be matched with the lower mold core 5 to form mounting grooves of the inner end face of the flywheel shell 100. The demoulding mechanism 6 is installed on the upper die 2 and is matched with the upper die core 4 so as to be used for demoulding the formed flywheel shell 100 and the upper die core 4. Generally, the lower mold 3 is fixedly arranged, and the top of the upper mold 2 is connected with a lifting device, so that the lifting device can drive the upper mold 2 and the formed flywheel housing 100 to move upwards relative to the lower mold 3 to open the mold during demolding. And the mold releasing mechanism 6 may perform a mold releasing process including a first process and a second process in sequence during the mold opening. Wherein the first process: the demoulding mechanism 6 can drive the core assembly to move upwards in a direction vertical to the inclined plane of the mounting groove until the core assembly is separated from the formed mounting groove; the second process: the demoulding mechanism 6 can drive the formed flywheel housing 100 to move downwards to be separated from the upper mold core 4, so that interference-free demoulding of the flywheel housing 100 is realized, the forming quality of the formed flywheel housing 100 is improved, and the service life of the mold is prolonged.

It can be understood that, as shown in fig. 2 and 3, the side surface of the first rib 101 is parallel to the demolding direction, so that the first rib 101 can be assuredly perfectly demolded from the core set regardless of whether the demolding direction of the core set at the time of demolding is vertically upward or obliquely upward. The side surface of the second rib 102 is inclined to the demolding direction, so that when the mold core set is demolded, the demolding direction needs to be ensured to be parallel to the side surface inclined direction of the second rib 102; since the side surface of the second rib 102 is perpendicular to the inclined surface of the mounting groove, when the mold core assembly is demolded, the perfect demolding of the first rib 101 and the second rib 102 can be ensured simultaneously by moving upward in the direction perpendicular to the inclined surface of the mounting groove.

It will also be appreciated that the lifting device is of the prior art and that the connection and drive relationship between the lifting device and the upper moulds 2 is common knowledge to those skilled in the art. Common lifting devices include air cylinders, hydraulic cylinders, linear motors, and the like.

Meanwhile, the description of the orientation and the position of each component described below in the present application are described based on the orientation in which the mold is placed when casting is performed.

In the present embodiment, as shown in fig. 5, 7, 8, 13, and 14, the upper core 4 further includes a base core 41, and the core set is detachably attached to the base core 41. The core group includes a first core 42, a second core 43, and a third core 44; the first core 42 is used to form the first mounting groove 110, the second core 43 is used to form the second mounting groove 120, and the third core 44 is used to form the third mounting groove 130. The ejector mechanism 6 is connected to the first core 42 and the third core 44 by two first ejector pins 622, respectively, and to the second core 43 by a second ejector pin 623. When the first process is performed, the mold releasing mechanism 6 is moved up in synchronization with the driving type core group in a direction perpendicular to the slope of the corresponding mounting groove by the vertical upward movement of the first and

second push rods

622 and 623, respectively.

It can be understood that the upper core 4 has a large size and a complicated structure, so that the difficulty in processing the first, second, and

third cores

42, 43, and 44 can be reduced by separately processing the core groups and then detachably mounting the processed core groups in the base core 41.

Meanwhile, as shown in fig. 1, the first mounting groove 110 and the third mounting groove 130 have the same or similar structure, except that the inclination directions of the bottom surfaces of the first mounting groove 110 and the third mounting groove 130 are different; when the structural design of the first core 42 and the third core 44 is performed, the first core 42 and the third core 44 are designed in the same manner, and when the mold release is performed, the mold release process of the first core 42 and the third core 44 is also the same, so in the following description, only the description of the first core 42 will be performed.

In one embodiment of the present application, as shown in fig. 5 to 8, the base core 41 is provided with a second mounting cavity 412, and the second core 43 is slidably mounted in the second mounting cavity 412. The second core 43 includes a second base block 431 and a second drawing block 432; the bottom of the second base block 431 is a second forming block 4311, and the bottom of the second traction block 432 is a third forming block 4321; the bottom inclined surface of the second molding block 4311 is provided with a plurality of first molding grooves 4001 and a plurality of second molding grooves 4002, and the bottom inclined surface of the third molding block 4321 is provided with only a plurality of third molding grooves 4003.

Meanwhile, a second sliding cavity 4310 is formed in one side of the second base block 431, and the other side of the second base block 431 is matched with the second mounting cavity 412 through a guide structure; the second traction block 432 is engaged with the second sliding chamber 4310, and the second traction block 432 is also connected with the second push rod 623. So that when the second mold core 43 is cast, the second forming block 4311 and the third forming block 4321 cooperate with each other to protrude outside the second mounting cavity 412, and cooperate with the first forming groove 4001 and the third forming groove 4003 in alignment to form the first convex rib 101; and the first ribs 101 are molded through the second molding grooves 4002. When the first process is performed, the demolding mechanism 6 can vertically move the second ejector pin 623 upwards, so that the second traction block 432 can synchronously move upwards along with the second ejector pin 623 to be contracted in the second sliding cavity 4310 until the top of the second traction block 432 abuts against the top of the second sliding cavity 4310; then, the second traction block 432 continues to move upwards along with the vertical movement of the second top rod 623, so that the second base block 431 can be driven to move upwards through the guide structure in a direction perpendicular to the bottom inclined plane of the second forming block 4311 until the second forming groove 4002 is perfectly separated from the second convex rib 102.

It can be understood that, as shown in fig. 1, the cross sections of the second mounting grooves 120 in the vertical direction are all triangular, and the projections of the second mounting grooves 120 in the horizontal direction are rectangular or trapezoidal; and both ends of the second mounting groove 120 are parallel to the demolding direction. As shown in fig. 7 and 8, in order to ensure that the second rib 102 of the bottom slope of the second mounting groove 120 can be perfectly demolded, a molding part for molding the second mounting groove 120 may be divided into a second molding block 4311 and a third molding block 4321; the third forming block 4321 may be used to form the vertical side of the second mounting groove 120 in the vertical direction, and the second forming groove 4002 for forming the second rib 102 is not present on the third forming block 4321. Therefore, when demolding is performed, the third forming block 4321 is moved upwards to be contracted in the second sliding cavity 4310, so that partial demolding of the first convex rib 101 can be realized, and meanwhile, an avoiding space can be provided for subsequent inclined upward movement of the second forming block 4311.

In this embodiment, as shown in fig. 6 to 8, a first spring 710 is mounted on the top of the second mounting cavity 412, and the first spring 710 is abutted against the top of the second base block 431. The guiding structure comprises a positioning block 4312 and a positioning groove 4121 which are in sliding fit with each other, and the matching sliding direction of the positioning block 4312 and the positioning groove 4121 is perpendicular to the bottom inclined plane of the second forming block 4311. The positioning block 4312 and the positioning groove 4121 are arranged in two ways; first, the positioning block 4312 is disposed on the second base block 431, and the positioning groove 4121 is disposed in the second mounting cavity 412; second, the positioning block 4312 is disposed in the second mounting cavity 412, and the positioning groove 4121 is disposed in the second base block 431. Therefore, when the second pulling block 432 pushes against the second sliding cavity 4310 to drive the second base block 431 to move synchronously, the second base block 431 can slide in cooperation with the positioning block 4312 and the positioning groove 4121 to move up in an inclined manner perpendicular to the bottom inclined surface of the second forming block 4311 and compress the first spring 710 until the second forming block 4311 at the bottom of the second base block 431 is released from the mold together with the second rib 102 and the first rib 101.

Specifically, as shown in fig. 6 to 8, the upper and lower ends of the positioning block 4312 are both second inclined surfaces 4313, and the upper and lower ends of the positioning groove 4121 are both first inclined surfaces 4122. The inclined directions of the first inclined surface 4122 and the second inclined surface 4313 are perpendicular to the bottom inclined surface of the second molding block 4311 provided at the bottom of the second base block 431. Thus, when the second traction block 432 moves the second base block 431 synchronously by abutting against the second sliding chamber 4310, the second base block 431 can slide on the first inclined surface 4122 and the second inclined surface 4313 to move up in an inclined manner perpendicular to the bottom inclined surface of the second forming block 4311.

Meanwhile, the vertical section of the second traction block 432 is in a T shape; therefore, during casting, the second traction block 432 can be guaranteed to be abutted and matched with the lower end of the second installation cavity 412 by pressing down the second ejector pin 623, and meanwhile, the second traction block 432 can be abutted and matched with the lower end of the second sliding cavity 4310 to guarantee that the second base block 431 and the second installation cavity 412 are in extruded matching; thereby ensuring the stability of the second core 43 during casting.

It will be appreciated that the second traction block 432 is spaced from the side of the second sliding chamber 4310 adjacent to the guide structure when casting is performed, to ensure that the second traction block 432 of the second base block 431 moves in the horizontal direction without interference. Therefore, the size of the gap is at least required to satisfy the horizontal moving distance of the second base block 431 when the second rib 102 is completely released from the mold, that is, the gap is at least equal to or greater than t.

The process of demolding the second core 43 will be specifically described below; for convenience of description, the positioning block 4312 may be disposed on the second base block 431, and the positioning groove 4121 may be disposed at a side portion of the second mounting cavity 412.

(1) When casting is performed, as shown in fig. 7; the second and third forming

blocks

4311 and 4321 are engaged with each other and protrude to the outside of the second mounting chamber 412; meanwhile, both ends of the first spring 710 are respectively in contact with the base core 41 and the second base block 431, so that the first spring 710 is in a natural state or a compressed state; to ensure subsequent spring force requirements, the first spring 710 may preferably be a rectangular spring, and is preferably in a compressed state at this time.

(2) When the first process is performed, as shown in fig. 8; first, the second pulling block 432 moves vertically upward by the pulling of the second push rod 623 until the second pulling block 432 is completely retracted into the second sliding chamber 4310 of the second mounting chamber 412, and the upper end of the second pulling block 432 is just contacted with the upper end of the second sliding chamber 4310. Subsequently, the second pulling block 432 continuously moves upward along with the second push rod 623, so as to drive the second base block 431 to move upward along the first inclined surface 4122 on the positioning groove 4121 through the second inclined surface 4313 on the positioning block 4312, synchronously in a direction perpendicular to the direction of the inclined surface at the bottom of the second forming block 4311, until the second forming groove 4002 is perfectly separated from the second rib 102. During this process, the first spring 710 is continuously compressed.

(3) When the second process is completed and the second process is reset, the second push rod 623 can drive the second traction block 432 to vertically move downwards until the second traction block 432 abuts against the lower end of the second installation cavity 412, so as to extend the third forming block 4321 to the outside of the second installation cavity 412. While the second traction block 432 is moved vertically downward; the second base block 431 can be moved down obliquely along the first inclined surface 4122 on the positioning groove 4121 by the second inclined surface 4313 under the elastic force of the first spring 710 until the second base block 431 is restored to the position at the time of casting.

It is understood that, in order to ensure that the second base block 431 can be smoothly reset, the matching length of the first inclined surface 4122 and the second inclined surface 4313 needs to be longer than the inclined upward moving distance of the second base block 431.

It is also understood that, if the first spring 710 is not provided, the second base block 431 can be driven to reset by the second traction block 432 pressing the second base block 431 during resetting. However, the second traction block 432 is pressed to cause abrasion, thereby affecting the forming quality of subsequent products. In this embodiment, by providing the first spring 710, it can be ensured that the second base block 431 and the second traction block 432 are reset at the same time, so as to avoid the second base block 431 and the second traction block 432 contacting each other in the resetting process, thereby improving the forming quality of subsequent products, and also improving the service life of the second core 43.

In one embodiment of the present application, as shown in fig. 9 to 14, a first mounting cavity 411 and a third mounting cavity 413 are provided on the base core 41, and the first core 42 and the third core 44 are respectively mounted in the first mounting cavity 411 and the third mounting cavity 413. The first core 42 comprises a first base block 421, a first drawing block 422 and a forming die set 423. The first base block 421 is fixedly installed in the first installation cavity 411, a first sliding cavity 4210 is arranged inside the first base block 421, a first molding block 4211 is arranged at the bottom of the first base block 421, a plurality of molding protrusions 4004 are arranged on the inclined surface of the bottom of the first molding block 4211, a communication groove 4212 communicated with the first sliding cavity 4210 is arranged between every two adjacent molding protrusions 4004, and the opening direction of the communication groove 4212 is perpendicular to the inclined surface of the bottom of the first molding block 4211; the molding module 423 is slidably mounted in the first sliding cavity 4210 and is matched with the communication groove 4212; the first traction block 422 is slidably mounted in the first sliding cavity 4210 and is connected to the first traction block 422 through a driving structure, and the first traction block 422 is further connected to the first top rod 622. When casting is performed, the molding die 423 may extend out of the communication groove 4212 and cooperate with the molding projection 4004 to form a second molding groove 4002 for molding the second bead 102. When carrying out first process, first traction block 422 can move up along with first ejector pin 622, and then goes on along the slip of intercommunication groove 4212 through the drive structure in order to order about forming module 423 to guarantee when the second process, the drawing of patterns that carries on of first mounting groove 110 can noninterference.

It can be understood that, as shown in fig. 1, the cross sections of the first installation grooves 110 in the vertical direction are all triangular, and the projection of the first installation groove 110 in the horizontal direction is trapezoidal or triangular; and one of the end surfaces of the first mounting groove 110 is parallel to the molding direction and the other end surface is inclined to the molding direction. If the first core 42 is configured as the second core 43, a part of the structure of the first core 42 interferes with the inclined end surface of the first mounting groove 110 during mold release and cannot move. Therefore, in the present embodiment, the forming module 423 is used to form the portion of the second rib 102 where the mold releasing interference occurs; therefore, in the demolding process, the first traction block 422 drives the forming module 423 to tilt and move upwards relative to the first base block 421, and the upward movement distance only needs to satisfy the requirement of not interfering with demolding, namely, the horizontal movement distance generated when the forming module 423 tilts and moves upwards to the set distance is t.

In this embodiment, as shown in fig. 9 to 14, the molding module 423 includes a plurality of molding modules 4006 and a connecting block 4231, and each molding module 4006 is fixed to the connecting block 4231 by a back portion. The length of each molding module 4006 is different for adapting and molding the second ribs 102 with different sizes on the bottom slope of the first mounting groove 110. The driving structure comprises a driving slot 4220 and a driving block 4232, and the opening direction of the driving slot 4220 and the extending direction of the driving block 4232 are parallel to the inclined surface of the first forming block 4211. The drive groove 4220 and the drive block 4232 are mounted in two ways; first, the driving groove 4220 is arranged on the first traction block 422, and the driving block 4232 is arranged on the connecting block 4231; secondly, the driving groove 4220 is arranged on the connecting block 4231, and the driving block 4232 is arranged on the first traction block 422. Thus, when casting is performed, each molding block 4006 may protrude along the corresponding communication groove 4212 to mold the second ribs 102 of different sizes by cooperating with the corresponding molding projections 4004. When carrying out the first process, through the cooperation of drive groove 4220 and drive block 4232 to the bottom inclined plane direction of the first base piece 421 is turned into by vertical direction with the traction force of first traction block 422 to shaping module 423, thereby breaks away from with the second protruding muscle 102 after the shaping through driving shaping module 423, and then in the second process, when the flywheel housing 100 of forming carries out the drawing of patterns under demoulding mechanism 6's vertical drive, the first mounting groove 110 can be vertical noninterference the drawing of patterns that carries on.

It can be understood that the length of each molding protrusion 4004 is different according to the slope structure of the first mounting groove 110. The molding module 4006 has the same length as the corresponding molding bump 4004. The length of each forming bump 4004 is shorter than the width of the corresponding position of the first forming bump 4211, so that the first sliding cavity 4210 has a space which can satisfy the moving of the forming module 423 when the forming module 423 is demolded.

In the present embodiment, as shown in fig. 10 and 12, the molding projection 4004 and the molding block 4006 are each provided with a plurality of molding grooves 4005 in the extending direction. When casting is performed, the molding projection 4004 and the molding groove 4005 of the molding block 4006 may be in aligned communication for molding the first rib 101.

In this embodiment, as shown in fig. 11 and 12, the connecting block 4231 is parallel to the bottom slope of the first molding block 4211. The bottom of the first traction block 422 is an extrusion surface 4221 parallel to the connecting block 4231, and a plurality of top blocks 4222 corresponding to the length of the forming module 4006 are arranged on two sides of the first traction block 422. Therefore, during casting, the stability of the first mold core 42 during casting can be ensured through the abutting fit of the pressing surface 4221 and the connecting block 4231 and the abutting fit of the top block 4222 and the corresponding molding module 4006.

When the demolding mechanism 6 performs demolding, generally, the first ejector pins 622 and the second ejector pins 623 move upward synchronously, and the upward movement distance is also the same. However, according to the different structures of the first core 42 and the second core 43, the distance that the first top rod 622 drives the first traction block 422 to move upwards is much smaller than the distance that the second top rod 623 drives the second traction block 432 to move upwards.

Therefore, the first core 42 and the second core 43 can be smoothly released from the mold releasing mechanism 6. One embodiment of the present application is shown in fig. 11 and 13-16. The first traction block 422 and the first base block 421 may be elastically connected by a second spring 720, and the second spring 720 is always in a stretched state. The upper part of the first traction block 422 is provided with a connecting groove 4223, and the bottom of the connecting groove 4223 is provided with a clamping groove 4225 communicated with each other along the circumferential direction. The first base block 421 is provided with a through hole 4213 aligned with the coupling groove 4223, a side wall of the through hole 4213 is provided with a guide groove 4214, and the guide groove 4214 includes an inclined section and a vertical section. A clamping block 6221 is provided at the lower end of the first post rod 622, and a guide block 6222 is provided at the lower side wall of the first post rod 622. When casting is performed, the first ejector rod 622 can penetrate through the through hole 4213 to be connected with the connecting groove 4223, and at the moment, the clamping block 6221 at the lower end of the first ejector rod 622 is in clamping fit with the clamping groove 4225; while the guide block 6222 on the first ejector pin 622 engages with the inclined section. When the first process is performed, the first ejector rod 622 can drive the first traction block 422 to move up synchronously, so as to drive the forming module 423 to move up obliquely; during the process of moving the first top rod 622 upwards, the first top rod 622 can slide along the inclined section through the guide block 6222 to rotate until the latch 6221 is disengaged from the latch groove 4225, and at this time, the forming module 423 is just moved upwards in an inclined manner to a set distance position. The first drag block 422 is then kept stationary by the force of the second spring 720, while the first ejector pin 622 can continue its upward movement relative to the first drag block 422 along the vertical section by means of the guide block 6222, in order to avoid the stroke of the demolding mechanism 6 from being too large to interfere with the demolding of the first core 42.

It will be appreciated that the angular extent of the inclined section of the guide slot 4214 in the axial direction corresponds to the arc length of the slot 4225. Meanwhile, the opening size of the driving groove 4220 can be set to be larger than the thickness size of the driving block 4232, so that the vertical length of the inclined section can meet the design requirement.

The following may specifically describe the demolding process of the first core 42; for convenience of description, the driving groove 4220 may be provided to the first traction block 422, and the driving block 4232 may be provided to the connection block 4231; and the upper end of the first traction block 422 is coupled with the second spring 720.

(1) When casting is performed, as shown in (1) in fig. 13 and 16, each molding module 4006 of the molding module 423 extends along the corresponding communication groove 4212 to the outside of the first molding block 4211, and cooperates with the corresponding molding projection 4004 for molding the first rib 101 and the second rib 102. At this time, the drive block 4232 abuts against the upper end of the drive groove 4220; meanwhile, the clamping block 6221 of the first top rod 622 is in clamping fit with the clamping groove 4225.

(2) When the first process is performed, as shown in fig. 14; first, the first top rod 622 can drive the first traction block 422 to synchronously move vertically upwards through the engagement of the clamping block 6221 and the clamping groove 4225 until the lower end of the driving groove 4220 contacts with the lower end of the driving block 4232. Subsequently, the first ejector rod 622 continues to engage with the clamping block 6221 and the clamping groove 4225, so as to drive the first traction block 422 to continue to move vertically and synchronously, and in the process that the first traction block 422 moves upwards, the forming module 423 is driven to move upwards in an inclined manner by a set distance through the abutting fit between the lower end of the driving groove 4220 and the lower end of the driving block 4232. In this process, as shown in (2) of fig. 16, the first ejector rod 622 can move upward and rotate at the same time through the sliding fit between the guide block 6222 and the inclined section of the guide groove 4214 until the latch 6221 rotates to disengage from the latch groove 4225. Meanwhile, in the above process, the second spring 720 is always maintained in a stretched state. Finally, the first ejector pin 622 can continue to move upward along the vertical section of the guide groove 4214 by the guide block 6222 until the second core 43 is completely demolded. In this process, the first traction block 422 may be kept stationary by the abutting engagement with the upper end of the first sliding chamber 4210 and the elastic force of the second spring 720, or may be moved upward by the elastic force of the second spring 720 until it abuts against the upper end of the first sliding chamber 4210.

(3) When resetting is performed after the second process is completed; first, the first top bar 622 is vertically slid by the engagement of the guide block 6222 with the vertical section of the guide groove 4214 until the guide block 6222 is about to engage with the inclined section of the guide groove 4214. In this process, the first push rod 622 can move downwards to the lower end to abut against the bottom of the connecting groove 4223. Subsequently, the first top rod 622 continues to move downwards and rotates through the matching of the guide block 6222 and the inclined section of the guide groove 4214, so that the lower fixture block 6221 and the fixture groove 4225 can be clamped in the rotating process. In addition, during the process of rotating and moving down the first top rod 622, the first traction block 422 can move down synchronously stretching the second spring 720, and through the abutting fit between the driving groove 4220 and the driving block 4232, the molding module 423 is driven to move down obliquely until being reset to the casting position.

While the demolding mechanism 6 performs the first process, the demolding mechanism 6 effects demolding of the first core 42 and the second core 43 and the third core 44 by the first ejector pin 622 and the second ejector pin 623 moving vertically upward; when the demoulding mechanism 6 performs the second process, the flywheel housing 100 needs to be driven to vertically move downwards to realize demoulding with the upper mould core 4.

In order to ensure that the demolding mechanism 6 can smoothly perform the first process and the second process, as shown in fig. 17 to 19, the demolding mechanism 6 includes a drive plate 61, a first demolding unit 62, and a plurality of second demolding units 63. The driving plate 61 is slidably mounted at the upper end of the upper die 2, the first demoulding component 62 is used for demoulding the core assembly, and the second demoulding component 63 is used for demoulding the flywheel shell 100; the driving plate 61 is connected to the first stripper unit 62 through the reversing unit, and the driving plate 61 is connected to the second stripper unit 63. When the driving plate 61 moves downwards to perform demoulding, in the first process, the first demoulding assembly 62 can move upwards vertically through the reversing assembly, and then the core assembly is driven to move upwards in the direction perpendicular to the inclined plane of the mounting groove; while the flywheel housing 100 remains stationary; in a second process, the second stripper assembly 63 can be removed from the upper mold core 4 by downward movement of the drive plate 61 to remove the extruded flywheel housing 100.

In this embodiment, as shown in fig. 17 and 18, the first demolding assembly 62 is mounted on the upper mold 2, and the first demolding assembly 62 includes a slide plate 621, a first ejector pin 622, and a second ejector pin 623. Slide 621 slidable mounting goes up mould 2 in, and first ejector pin 622 and second ejector pin 623 all slidable mounting go up mould 2 and last mould core 4, and the upper end of first ejector pin 622 and second ejector pin 623 all carries out fixed connection with slide 621.

Meanwhile, the reversing assembly includes a first rack plate 611, a gear 612, and a second rack plate 624; the first rack plate 611 is vertically mounted to the driving plate 61, the gear 612 is rotatably mounted to the upper die 2, and the second rack plate 624 is vertically mounted to the slide plate 621. The first rack plate 611 and the second rack plate 624 are respectively engaged with both sides of the gear 612. Therefore, during the first process, the driving plate 61 can move vertically downwards under the driving of the driving device, and during the downward movement, the driving plate can drive the first rack plate 611 to move downwards synchronously to drive the gear 612 to rotate, so as to drive the sliding plate 621 to drive the first push rod 622 and the second push rod 623 to move vertically upwards through the engagement between the gear 612 and the second rack plate 624.

It will be appreciated that the drive means is of prior art and that its specific construction and operation are well known to those skilled in the art. Common driving devices include air cylinders, hydraulic cylinders, linear motors, and the like. Meanwhile, in order to ensure the stable stress of the first demolding assembly 62, there may be a plurality of reversing assemblies, preferably two reversing assemblies, and the reversing assemblies are symmetrically located on both sides of the sliding plate 621.

In this embodiment, as shown in fig. 17 and 19, the upper die 2 is provided with a plurality of vertical sliding holes 210; the lower sidewall of the slide hole 210 is vertically provided with a slide groove 220. The second stripper assembly 63 includes an upper ram 631, a lower ram 632, and a stop 633. The upper push rod 631 is fixedly connected with the driving plate 61 through an upper end, and the upper push rod 631 can be slidably engaged with the slide hole 210. Lower ejector pin 632 is slidably mounted on upper mold core 4 by third spring 730, upper ejector pin 631 and lower ejector pin 632 are aligned, and the upper end dimension of lower ejector pin 632 is greater than the lower end dimension of upper ejector pin 631. The stop 633 is slidably mounted in the sliding groove 220 through a fourth spring 740; when casting is performed, the first end of the stop block 633 extends into the sliding hole 210 under the elastic force of the fourth spring 740, so that the lower ejector 632 can be abutted and matched with the first end of the stop block 633 under the elastic force of the third spring 730; and the lower end of the upper push rod 631 is spaced apart from the upper end of the lower push rod 632. When the first process is performed, the lower post rod 632 can move downward along the sliding hole 210 along with the driving plate 61 until the lower end of the lower post rod 632 is pressed against the inclined surface of the first end of the stop block 633, and then contacts with the upper end of the lower post rod 632. When the second process is performed, the lower post 632 can continue to move down along the slide hole 210 with the driving plate 61; in the process, the lower ejector pin 632 can move downwards synchronously according to the extrusion of the upper ejector pin 631 to compress the third spring 730, so that the molded flywheel housing 100 is extruded downwards to be separated from the upper mold core 4.

A specific working process of the second stripper assembly 63 can be described:

(1) when casting is performed, the lower end of the lower ejector rod 632 is just matched with a cavity for molding the flywheel housing 100; meanwhile, the lower ejector rod 632 pushes the upper end of the lower ejector rod to abut against the first end of the stop block 633 through the elastic force of the third spring 730, so that the lower ejector rod 632 has sufficient stability in the casting process.

(2) When the first process is performed, the upper push rod 631 is driven by the driving plate 61 to move vertically downward along the slide hole 210 until the stopper 633 is pressed by the lower end of the upper push rod 631 through the first end slope to slide toward the inside of the slide groove 220, and the lower end of the upper push rod 631 can be in right contact with the upper end of the lower push rod 632. At this time, the first end of the stopper 633 is pressed against the sidewall of the upper post 631 by the elastic force of the fourth spring 740.

(3) When the second process is performed, the upper ejector 631 continuously performs the vertical downward movement along the slide hole 210 by the driving of the driving plate 61; the lower ejector rod 632 is extruded by the upper ejector rod 631 to synchronously move downwards and vertically to compress the third spring 730, so that the formed flywheel shell 100 is separated from the upper die core 4, and the whole demolding process of the flywheel shell 100 is completed; in this process, the first end of the stop 633 is pressed against the sidewall of the upper post 631 by the elastic force of the fourth spring 740.

(4) When the reset is performed, the upper push rod 631 vertically moves up along the slide hole 210 by the driving plate 61 until it is reset to the initial position. In the process that the upper push rod 631 moves upwards, the lower push rod 632 can synchronously move upwards vertically under the elastic force of the third spring 730 until the lower push rod 632 approaches the stop block 633, and the size of the upper end of the lower push rod 632 is larger than that of the lower end of the upper push rod 631, so that the lower push rod 632 is kept still by abutting against the stop block 633.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and such changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims

1. A flywheel housing casting mold is characterized by comprising:

the upper end of the lower die is provided with a lower die core;

the lower end of the upper die is provided with an upper die core; the upper mold core and the lower mold core are mutually matched to form a cavity for casting the flywheel shell; the upper die core comprises two symmetrically arranged core groups, and the core groups are suitable for being matched with the lower die core to form mounting grooves of the flywheel shell; and

a demolding mechanism mounted on the upper mold; when demoulding is carried out, the upper die drives the formed flywheel housing to move upwards relative to the lower die; meanwhile, the demolding mechanism is suitable for sequentially performing a first process and a second process;

wherein the first process: the demoulding mechanism is suitable for driving the mould core group to move upwards in a direction vertical to the inclined plane of the mounting groove until the mould core group is separated from the formed mounting groove; the second process: the demoulding mechanism is suitable for driving the formed flywheel shell to move downwards so as to be separated from the upper mould core.

2. The flywheel housing casting mold of claim 1, wherein: the upper mold core further comprises a base mold core; the core group is detachably arranged on the base core; the mold core group comprises a first mold core, a second mold core and a third mold core, and is used for forming a first mounting groove, a second mounting groove and a third mounting groove respectively, and the demolding structures of the first mold core and the third mold core are the same; the demolding mechanism is respectively connected with the first mold core and the third mold core through a first ejector rod, and is connected with the second mold core through a second ejector rod; when the first process is carried out, the demoulding mechanism respectively drives the core assembly to synchronously move upwards in the direction vertical to the inclined plane of the corresponding mounting groove through the vertical upwards movement of the first ejector rod and the second ejector rod.

3. The flywheel housing casting mold of claim 2, wherein: a second mounting cavity is formed in the base mold core; the second mold core is slidably mounted in the second mounting cavity; the second mold core comprises a second base block and a second traction block; the bottom inclined plane of the second base block is used for forming a second convex rib; a second sliding cavity is formed in one side of the second base block, the other side of the second base block is matched with the second installation cavity through a guide structure, and the second traction block is connected with the second ejector rod;

when the second core is cast, the bottoms of the second base block and the second traction block are extended out of the second mounting cavity in a matched mode to form a first convex rib and a second convex rib;

when the first process is carried out, the second traction block shrinks into the second sliding cavity along with the upward movement of the second ejector rod, and then the second traction block is matched with the second sliding cavity in a propping mode to drive the second base block to move upward in a direction perpendicular to the bottom inclined plane of the second base block through the guide structure until the second base block is separated from the formed second convex rib.

4. The flywheel housing casting mold of claim 3, wherein: a first spring is mounted at the top of the second mounting cavity and is abutted and matched with the top of the second base block; the guide structure comprises a positioning block and a positioning groove which are in sliding fit with each other, and the matching sliding direction of the positioning block and the positioning groove is perpendicular to the bottom inclined plane of the second base block;

the positioning block is arranged on the second base block, and the positioning groove is arranged in the second installation cavity;

or, the positioning block is arranged in the second mounting cavity, and the positioning groove is arranged in the second base block;

when the second traction block drives the second base block to synchronously move through the propping against the second sliding cavity, the second base block is suitable for sliding in a manner of matching with the positioning block and the positioning groove, and the second base block inclines and moves upwards perpendicular to the bottom slope of the second base block and compresses the first spring.

5. The flywheel housing casting mold of claim 2, wherein: the first mold core comprises a first base block, a first traction block and a forming module; the first base block is fixed to the base core; a first sliding cavity is arranged in the first base block, a plurality of forming convex blocks are arranged on the bottom inclined surface of the first base block, a communicating groove communicated with the first sliding cavity is arranged between every two adjacent forming convex blocks, and the opening direction of the communicating groove is perpendicular to the bottom inclined surface of the first base block; the molding module is slidably arranged in the first sliding cavity and matched with the communication groove; the first traction block is slidably arranged in the first sliding cavity and is connected with the first traction block through a driving structure, and the first traction block is also connected with the first ejector rod;

when casting is carried out, the molding module is suitable for extending out of the communication groove and is matched with the molding lug to mold a second convex rib;

when the first process is carried out, the first traction block is suitable for moving upwards along with the first ejector rod, and the forming module is driven to slide along the communication groove through the driving structure.

6. The flywheel housing casting mold of claim 5, wherein: the forming module comprises a plurality of forming modules and a connecting block; the driving structure comprises a driving groove and a driving block, and the opening direction of the driving groove and the extending direction of the driving block are both parallel to the bottom inclined plane of the first base block;

the driving groove is arranged on the first traction block, and the driving block is arranged on the connecting block;

or the driving groove is arranged on the connecting block, and the driving block is arranged on the first traction block;

when the first process is carried out, the driving groove is matched with the driving block, so that the traction force of the first traction block on the forming module is converted from the vertical direction to the direction perpendicular to the bottom inclined plane of the first base block.

7. The flywheel housing casting mold of claim 5, wherein: the first traction block is elastically connected with the first base block through a second spring; the upper part of the first traction block is provided with a connecting groove, and the bottom of the connecting groove is provided with clamping grooves communicated along the circumferential direction; a through hole aligned with the connecting groove is formed in the first base block, a guide groove is formed in the side wall of the through hole and comprises an inclined section and a vertical section; a clamping block is arranged at the lower end of the first ejector rod, and a guide block is arranged at the lower part of the first ejector rod; the second spring is always in a stretching state;

when casting is carried out, the first ejector rod penetrates through the through hole to be connected with the connecting groove, so that the clamping block is matched with the clamping groove;

when the first process is carried out, the first ejector rod drives the first traction block to move upwards and simultaneously rotates along the sliding of the inclined section through the guide block until the fixture block is disengaged from the clamping groove, and the first ejector rod vertically moves upwards relative to the first traction block.

8. The flywheel housing casting mold according to any of claims 2 to 7, wherein: the demolding mechanism comprises a driving plate, a first demolding assembly and a plurality of second demolding assemblies; the driving plate is slidably mounted on the upper die, the first demolding assembly is used for demolding the core set, and the second demolding assembly is used for demolding the flywheel shell; the driving plate is connected with the first demolding assembly through a reversing assembly, and the driving plate is connected with the second demolding assembly;

when the driving plate moves downwards to perform demoulding, in the first process, the first demoulding assembly vertically moves upwards through the reversing assembly to drive the die core group to move upwards in the direction vertical to the inclined plane of the mounting groove; in the second process, the second demolding component separates the extruded flywheel shell from the upper mold core through downward movement of the driving plate.

9. The flywheel housing casting mold of claim 8, wherein: the first demolding assembly comprises a sliding plate, the first ejector rod and the second ejector rod; the sliding plate is slidably mounted on the upper die, and the first ejector rod and the second ejector rod are fixedly connected with the sliding plate; the reversing assembly comprises a first rack plate, a gear and a second rack plate; the first rack plate is vertically arranged on the driving plate, the gear is rotatably arranged on the upper die, and the second rack plate is vertically arranged on the sliding plate; the first rack plate and the second rack plate are respectively meshed with two sides of the gear; and then in the first process, the driving plate drives the sliding plate to drive the first ejector rod and the second ejector rod to vertically move upwards by driving the first rack plate to move downwards.

10. The flywheel housing casting mold of claim 8, wherein: the upper die is provided with a plurality of vertical sliding holes; a sliding groove is vertically formed in the side wall of the lower part of the sliding hole; the second demolding assembly comprises an upper ejector rod, a lower ejector rod and a stop block; the upper ejector rod is fixedly connected with the drive plate and is in sliding fit with the slide hole; the lower ejector rod is slidably mounted on the upper mold core through a third spring, the upper ejector rod is aligned with the lower ejector rod, and the size of the upper end of the lower ejector rod is larger than that of the lower end of the upper ejector rod; the stop block is slidably arranged in the chute through a fourth spring;

when casting is carried out, the first end of the stop block extends into the sliding hole under the elastic force of the fourth spring, so that the lower ejector rod is abutted and matched with the first end of the stop block under the elastic force of the third spring; meanwhile, the lower end of the upper ejector rod and the upper end of the lower ejector rod are arranged at intervals;

when the first process is carried out, the lower ejector rod moves downwards along with the driving plate until the lower ejector rod is extruded with the inclined surface of the first end of the stop block, and then the lower ejector rod is contacted with the upper end of the lower ejector rod;

when the second process is performed, the lower carrier rod is adapted to perform a synchronous downward movement for compressing the third spring according to the compression of the upper carrier rod.