Spliced flywheel type casting mold and splicing method thereof

Abstract

The present application relates to the field of metal casting mold, in particular to a spliced flywheel casting mold and a splicing method thereof, the mold comprises a mold frame, an upper mold and a lower mold in a parting structure, the upper mold comprises an upper core, a pressing surface block and a fixing arm, the fixing arm is connected with a mold fixing assembly in the lower mold, the lower mold comprises a lower core ring seat and a movable base core ring seat, after casting is completed, the upper mold is lifted by hoisting equipment, the elastic member drives the pressing surface block to rise obliquely upward, then the telescopic cylinder drives the movable base core ring seat carrying the flywheel to rise, because the parting gap is connected and the atmospheric pressure inside and outside the balanced cavity is balanced, the demolding is relatively easy, when casting, the molten iron extends to the pouring lug column on both sides of the flywheel to form casting lugs, the casting lugs on both sides are connected by a forklift or hoisting equipment to quickly demold and take away the flywheel, so that the flywheel is demolded faster and more conveniently, and the upper and lower molds can quickly return to the original position to continue the next casting operation, so that the casting and demolding operations are quickly and conveniently performed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metal casting mold, in particular to a spliced flywheel type casting mold and a splicing method thereof. BACKGROUND

[0002] The flywheel casting part is installed on the power output end of the crankshaft of a diesel engine or other power equipment, and the large inertia of the flywheel is used to ensure that the diesel engine has a permissible rotational unevenness, and a steel gear ring is installed on the outer edge of the flywheel to mesh with the gear of the starter motor to start the engine.

[0003] The metal flywheel is large in size and has a large difference in casting conditions from plastic products. It is usually manufactured by sand mold casting. After the rough casting, the work surface needs to be milled in a machining center to achieve the required surface roughness.

[0004] The prior art usually uses two complete upper and lower molds to form a core by mutual clamping when casting a flywheel. After casting is completed, demolding operation is required. The usual demolding includes two parts. First, a part of the mold is removed from the workpiece. Second, the workpiece is allowed to fall off from the remaining mold by gravity or other means. This makes it difficult to demold the cast flywheel in the first part. After removing one mold, the other mold needs to be lifted to an inclined position in the second part before the workpiece can be removed from the other mold. This causes great inconvenience to processing. Some split molds for metal casting are usually assembled and spliced when needed. This not only makes splicing more complicated, but also requires a large degree of movement and disassembly of the mold during demolding. It still causes great inconvenience to processing. In addition, the pouring gate is usually located on the end face of the flywheel workpiece during casting, and the pouring ears formed at the pouring gate are usually perpendicular to the end face of the flywheel, which causes great inconvenience to demolding. SUMMARY

[0005] In view of the above-mentioned problem of inconvenient demolding of the metal flywheel casting mold, the present application provides a spliced flywheel type casting mold, which comprises an upper mold and a lower mold. The outer sides of the upper mold and the lower mold are provided with a mold frame. The upper mold and the lower mold are both split structure. The upper mold is movably mounted at the top end of the mold frame and is pressed downward on the lower mold. The pressing range of the upper mold and the lower mold forms a cavity inside.

[0006] The upper mold comprises an upper core and a pressing block arranged around the upper core. The pressing block is movably mounted at the side end of the upper core. The upper core is provided with an elastic member for providing upward elastic force to the pressing block. The bottom end of the upper core and the pressing block is a working contact surface.

[0007] The lower mold comprises a lower mold ring seat and a movable base mold ring seat, the top end of the lower mold ring seat and the movable base mold ring seat is a working contact surface and cooperates with the bottom end of the upper mold core and the pressing surface block to form a mold cavity;

[0008] The mold cavity part of the top end of the movable base mold ring seat comprises two reference surfaces forming the center and the outer edge of the flywheel;

[0009] The upper mold further comprises a fixed arm connected with the elastic member and the movable pressing surface block, the fixed arm extends downward and is connected with the fixed mold assembly provided in the lower mold and covers the upper mold.

[0010] Further, the movable base mold ring seat comprises a flange cavity of the inner ring and an outer edge cavity of the outer ring, a vertical hole is provided in the middle of the flange cavity, and the flange cavity and the outer edge cavity form the flange part and the outer edge part of the flywheel respectively;

[0011] The bottom end of the upper mold core is provided with an extended tubular structure and is gap-connected with the hole in the middle of the flange cavity of the movable base mold ring seat;

[0012] A vertical flange hole column is provided around the hole of the flange cavity and abuts against the upper mold core.

[0013] Further, the area of the outer side of the upper mold core in contact with the pressing surface block is provided with an opening, and the inner side of the pressing surface block is provided with a driving arm extending to the inner side of the upper mold core through the opening;

[0014] Two clamping discs are provided in the upper mold core at the fixed arm, the clamping disc at the bottom end abuts against the elastic member, and the driving arm is clamped between the clamping discs and moves synchronously with the clamping discs in the vertical direction.

[0015] Further, the fixed arm extends out of the tubular structure provided at the bottom end of the upper mold core and extends downward;

[0016] The fixed mold assembly is fixedly provided at the bottom end of the lower mold, the fixed mold assembly comprises a guide pipe and a telescopic cylinder provided in the guide pipe, a movable pull arm is clamped at the top end and is rotationally connected with the telescopic arm of the telescopic cylinder;

[0017] A guide wheel is provided on the movable pull arm, an inclined guide chute is provided in the guide pipe, and the movable pull arm moves in the guide chute through the guide wheel and cooperates with the guide pipe.

[0018] Further, the top end of the movable pull arm extends by a certain length and is provided with a hook head at the top end of the extension, the bottom end of the fixed arm outside the tubular structure is provided with a buckle seat, and the buckle seat and the hook head are both semicircular or crescent-shaped and each occupies half of the projection area of the fixed arm on the horizontal plane;

[0019] The projection of the extension part on the horizontal plane only occupies one quarter of the projection plane of the fixed arm on the horizontal plane and does not interfere with the movement path of the buckle base, the path of the hook head is vertically spiral and interferes with the buckle base below the hook head.

[0020] Further, the upper core is externally provided with a guide frame with an inclined guide groove, the middle of the guide frame is provided with an opening and is located at the opening on the outside of the upper core, the inside of the pressure block is clamped on the guide groove of the guide frame through the movable roller;

[0021] The angle between the bottom end of the inclined guide groove and the outer wall of the upper core is greater than 5°.

[0022] Further, the pressure blocks on both sides of the movable base core ring seat are provided with pouring openings and pass through the internal cavity, the outer edge cavity edges on both sides of the movable base core ring seat are also provided with notches, and the notches on both sides of the movable base core ring seat are provided with pouring ear columns which can be detachably arranged on the mold frame.

[0023] Further, the bottom end of the movable base core ring seat is provided with a vertical limiting slide rod, and the movable base core ring seat retains the vertical movement freedom degree on the limiting slide rod, and the bottom end of the movable base core ring seat is also provided with a telescopic cylinder.

[0024] Further, the top end of the upper core is provided with a hook, the top end of the mold frame is provided with hoisting equipment, and the top end of the upper core is connected with the hoisting equipment through a rope or an iron chain.

[0025] The application also provides a splicing method of the splicing type flywheel type casting mold.

[0026] Step one: the mold assembly, the positioning slide rod and the telescopic cylinder are arranged at the bottom end of the mold frame, the slide sleeve is arranged at the bottom end of the movable base core ring seat, then the center of the movable base core ring seat and the slide sleeve at the bottom end thereof are aligned with the mold assembly and the limiting slide rod, and are arranged from top to bottom to the bottom end of the mold frame, and the telescopic arm of the telescopic cylinder is connected with the bottom end of the movable base core ring seat, at this time, the mold assembly is located in the center of the movable base core ring seat.

[0027] Step two: then the lower core ring seat is nested in the movable base core ring seat from the upper direction of the movable base core ring seat, and the bottom end of the lower core ring seat is fixed with the bottom end of the mold frame, and the pouring ear columns are installed at the notches on both sides of the movable base core ring seat.

[0028] Step three: the elastic member is first placed in the upper core, then the fixed arm is inserted into the upper core, the plurality of pressure blocks are clamped on the guide groove of the guide frame through the movable roller around the upper core, and the driving arm of the pressure block is inserted into the upper core and clamped between the clamping discs.

[0029] Step four: install the upper hook on the top end of the upper mold core, and install the hoisting equipment on the top end of the mold frame, connect the upper mold core with the hoisting equipment through ropes or iron chains, hoist the upper mold and align the lower mold;

[0030] Step five: put down the upper mold through the hoisting equipment to make the fixed arm enter the middle of the movable base mold ring seat until the upper mold core is pressed on the flange hole column in the middle of the movable base mold ring seat, start the mold fixing assembly to pull down the fixed arm to make the pressing block further press on the movable base mold ring seat to form the mold core, thereby completing the splicing operation of the flywheel casting mold.

[0031] Compared with the prior art, the present application has the following beneficial effects:

[0032] 1、The present application adopts the split type upper mold and lower mold to cast the flywheel, one side of the mold cavity is formed by the pressing block surrounding the upper mold core, the other side of the mold cavity is formed by the nested lower mold ring seat and movable base mold ring seat, the upper mold is set in the form of hoisting and moving, and the movable base mold ring seat of the lower mold is set in the form of movable jacking, after the upper mold and lower mold are cast, the upper mold is lifted by the hoisting equipment, the elastic member drives the pressing block to rise obliquely upward, a plurality of gaps are formed between the disassembled pressing blocks for connecting and balancing the atmospheric pressure inside and outside the mold cavity, so that the upper mold can be easily demolded from the flywheel, and then the telescopic cylinder at the bottom end of the movable base mold ring seat is started to drive the movable base mold ring seat carrying the flywheel to rise, since the edge parts formed by the flange part and the outer edge part have gaps formed by the movable base mold ring seat and the lower mold ring seat for connecting and balancing the atmospheric pressure inside and outside the mold cavity, the movable base mold ring seat drives the flywheel to jacking more easily, at this time, the flywheel workpiece is transported away, so that the flywheel can be better separated from the mold.

[0033] 2、The present application is provided with the mold fixing assembly at the bottom of the lower mold to cooperate with the fixed arm of the upper mold, when the pressing block of the upper mold is naturally parted to both sides through the elastic member, the hook head screw is guided to descend and hook the buckle seat downward through the guide pipe of the mold fixing assembly, so as to pull down the fixed arm and further make the fixed arm drive the pressing block to descend and press on the lower mold, thereby ensuring that the pressing block can be naturally parted to both sides through the elastic member after the fixed arm is separated from the restriction of the mold fixing assembly during demolding, and ensuring that the upper and lower molds can be quickly and stably tightly closed during molding.

[0034] 3、The present application forms the pouring gate at the pressing surface block of the movable base type ring seat, and the outer edge type cavity edge of the movable base type ring seat is also provided with a notch, and the pouring lug post is provided outside the notch, so that the excess molten iron is extended to the pouring lug post during pouring, thereby forming the outwardly extending pouring lug on both sides of the flywheel, and the user can connect the pouring lugs on both sides through the forklift or hoisting vehicle, so that the flywheel is quickly hoisted and taken away to perform the next process, so that the flywheel is more quickly and conveniently stripped, and the upper and lower molds can quickly return to the original position after being coated with the release agent to continue the next pouring operation, so that the pouring and stripping operations are quickly and conveniently performed. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the spliced flywheel type casting mold of the present application.

[0036] Figure 2 It is a schematic diagram of the local section of the flywheel type workpiece.

[0037] Figure 3 It is a schematic diagram of the three-dimensional structure of the bottom surface of the upper mold.

[0038] Figure 4 It is a three-dimensional diagram of the overall structure of the upper mold.

[0039] Figure 5 It is a schematic diagram of the upper mold, the lower mold, and the flywheel workpiece.

[0040] Figure 6 It is a schematic diagram of the three-dimensional structure of the flywheel workpiece and the lower mold.

[0041] Figure 7 It is a schematic diagram of the state of the fixed arm and the mold fixing assembly.

[0042] Figure 8 It is a three-dimensional structure diagram of the mold fixing assembly.

[0043] In the figure: A, flywheel; A1, flange part; A2, outer edge part; A3, pouring lug;

[0044] 1, upper mold; 2, lower mold; 3, mold frame; 4, mold fixing assembly; 5, telescopic cylinder;

[0045] 11, upper core; 12, pressing surface block; 13, guide frame; 14, elastic member; 15, fixed arm; 21, lower ring seat; 22, movable base type ring seat; 23, pouring lug post; 41, guide pipe; 42, movable pull arm; 43, hook head; 44, extension part;

[0046] 121. Movable roller; 122. Drive arm; 123. Casting gate; 151. Clamping disc; 152. Fastener; 221. Flange cavity; 222. Outer edge cavity; 223. Flange post; 411. Guide groove; 421. Guide wheel. Detailed Implementation

[0047] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Example: Figures 1-8 As shown, the present invention provides a spliced ​​flywheel casting mold, which includes an upper mold 1 and a lower mold 2, and a mold frame 3 provided on the outside of the upper mold 1 and the lower mold 2. Both the upper mold 1 and the lower mold 2 have a parting structure. The upper mold 1 has an outwardly expanding parting structure, while the lower mold 2 has an alternating upper and lower parting structure. The upper mold 1 is movably mounted on the top of the mold frame 3 and presses down on the lower mold 2. A cavity is formed in the middle of the pressing area of ​​the upper mold 1 and the lower mold 2. The cavity is used to form the cast molten iron into a flywheel A.

[0049] Specifically, for the upper mold 1 part, the upper mold 1 includes an upper core 11 and a pressure block 12 arranged around the upper core 11. The pressure block 12 is movably mounted on the side end of the upper core 11. The bottom end of the upper core 11 and the pressure block 12 is the working contact surface. The protruding part at the bottom end of the upper core 11 cooperates with the pressure block to form the recessed part of the middle flange A1 of the flywheel A on this surface.

[0050] An opening is provided in the area where the outer side of the upper core 11 contacts the pressing block 12, and a guide frame 13 with an inclined guide groove is provided at the opening. The inner side of the pressing block 12 is movably engaged with the guide groove of the guide frame 13 by a movable roller 121. A drive arm 122 is provided on the inner side of the pressing block 12 and extends to the inner side of the upper core 11 through the opening.

[0051] The fixed arm 15 passes through the upper core 11 and has two clamping discs 151 inside the upper core 11. The upper core 11 has an elastic element 14 that provides upward elastic force to the pressing block 12. The clamping disc 151 at the bottom abuts against the elastic element 14, causing the arm 122 to engage between the clamping discs 151 and move synchronously with the clamping discs 151 in the vertical direction.

[0052] In this embodiment, the elastic element 14 is a spring, and the angle between the bottom end of the inclined guide groove and the outer wall of the upper core 11 is greater than 5°, so that the pressing block 12 is subjected to the elastic force of being pushed up in opposite directions and rises obliquely upward along the inclined guide groove.

[0053] Specifically, for the lower die 2 part, the lower die 2 includes a lower mold ring seat 21 and a movable base mold ring seat 22, the top end of the lower mold ring seat 21 and the movable base mold ring seat 22 is a working contact surface and cooperates with the bottom end of the upper mold core 11 and the pressing surface block 12 to form a mold cavity, the mold cavity part of the top end of the movable base mold ring seat 22 includes two reference surfaces forming the center and the outer edge of the flywheel A;

[0054] The two reference surfaces are respectively reflected on the movable base mold ring seat 22 by the flange cavity 221 of the inner ring and the outer edge cavity 222 of the outer ring, the middle part of the flange cavity 221 is provided with a vertical hole, the flange cavity 221 and the outer edge cavity 222 form the flange part A1 and the outer edge part A2 of the flywheel A respectively, and the vertical flange hole column 223 is arranged around the hole of the flange cavity 221 and abuts against the upper mold core 11, and the upper mold 1 is limited and supported by the flange hole column 223 when the upper mold 1 and the lower mold 2 are assembled.

[0055] The bottom end of the movable base mold ring seat 22 is provided with a vertical limiting slide rod, and the movable base mold ring seat 22 retains the vertical movement freedom on the limiting slide rod, and the bottom end of the movable base mold ring seat 22 is also provided with the telescopic cylinder 5 for controlling the jacking movement of the movable base mold ring seat 22.

[0056] In the cooperation of the upper mold 1 and the lower mold 2, the bottom end of the upper mold core 11 is provided with an extended tubular structure and gap fits the hole in the middle of the flange cavity 221 of the middle part of the movable base mold ring seat 22, the upper mold 1 further includes a fixed arm 15 connected with the elastic member 14 and the movable pressing surface block 12, the fixed arm 15 extends out of the tubular structure provided at the bottom end of the upper mold core 11 and extends downward, the fixed arm 15 extends downward and is connected with the fixed mold assembly 4 provided in the lower mold 2 and covers the upper mold 1.

[0057] Specifically, for the fixed mold assembly 4 part, the fixed mold assembly 4 is fixedly arranged at the bottom end of the lower mold 2, the fixed mold assembly 4 includes a guide pipe 41 and a telescopic cylinder 5 arranged in the guide pipe 41, a movable pull arm 42 is clamped at the top end and is rotationally connected with the telescopic arm of the telescopic cylinder 5, a guide wheel 421 is arranged on the movable pull arm 42, an inclined guide inclined groove 411 is arranged in the guide pipe 41, and the movable pull arm 42 moves in the guide inclined groove 411 through the guide wheel 421 and cooperates with the guide pipe 41.

[0058] At the same time, the top end of the movable pull arm 42 extends a section of extension and is provided with a hook head 43 at the top end of the extension 44, the bottom end of the fixed arm 15 outside the tubular structure is provided with a buckle seat 152, the buckle seat 152 and the hook head 43 are both semicircular or crescent and each occupies half of the projection area of the fixed arm 15 in the horizontal plane.

[0059] The projection of the extension 44 on the horizontal plane only occupies one quarter of the projection plane of the fixed arm 15 on the horizontal plane and does not interfere with the movement path of the buckle seat 152, the path of the hook head 43 is vertically spiral and interferes with the buckle seat 152 below the hook head 43, the extension 44 follows the descent and rotation of the movable pull arm 42, and during this period, it does not interfere with the buckle seat 152.

[0060] For the casting part, the pressing blocks 12 on both sides of the movable base ring seat 22 are provided with casting openings 123 and pass through the internal cavity, and the edges of the outer edge cavities 222 on both sides of the movable base ring seat 22 are also provided with notches. The molten iron enters the cavity through the casting openings 123 on both sides, and the notches on both sides of the movable base ring seat 22 are provided with pouring ear columns 23, which are detachably installed on the mold frame 3. During casting, the excess molten iron extends to the pouring ear columns 23, thereby forming outwardly extending pouring ears A3 on both sides of the flywheel A.

[0061] The embodiment also provides a splicing method of the splicing type flywheel A class casting mold, which comprises the following steps:

[0062] Step one: position and install the mold assembly 4, the positioning slide rod and the telescopic cylinder 5 at the bottom end of the mold frame 3. In this embodiment, the positioning slide rod has four rods, so the four positioning slide rods are positioned in a square four-corner manner, and the mold assembly 4 is located at the center. Then, the telescopic cylinder 5 is installed on the radius connecting line of the positioning slide rod, the slide sleeve is installed at the bottom end of the movable base ring seat 22 and is nested with the positioning slide rod, then the center of the movable base ring seat 22 and the slide sleeve at the bottom end thereof are aligned with the mold assembly 4 and the limiting slide rod, and the movable base ring seat 22 is installed from top to bottom at the bottom end of the mold frame 3, and the telescopic arm of the telescopic cylinder 5 is connected with the bottom end of the movable base ring seat 22. At this time, the mold assembly 4 is located inside the center of the movable base ring seat 22.

[0063] Step two: then nest the lower ring seat 21 upwards into the movable base ring seat 22 from the movable base ring seat 22 and fix the bottom end of the lower ring seat 21 with the bottom end of the mold frame 3. In work, the lower ring seat 21 remains fixed, and the movable base ring seat 22 moves relative to the lower ring seat 21. The pouring ear columns 23 are installed at the notches on both sides of the movable base ring seat 22, the top ends of the pouring ear columns 23 are flush with the bottom surface of the notches, and the pouring ear columns 23 can also be provided with certain grooves as extensions of the notches.

[0064] Step three: first, put the elastic member 14 into the upper core 11, then the inner side of the pressing block 12 is movably clamped on the guide groove of the guide frame 13 through the movable roller 121, and the fixed arm 15 is inserted into the upper core 11, a plurality of pressing blocks 12 are movably clamped on the guide groove of the guide frame 13 through the movable roller 121 around the upper core 11, and the driving arm 122 of the pressing block 12 is inserted into the upper core 11 and clamped between the clamping discs 151.

[0065] Step four: install the upper hook on the top end of the upper core 11, and install the hoisting equipment on the top end of the mold frame 3, which can be done by a winch, connect the upper core 11 with the hoisting equipment through a rope or a chain, hoist the upper mold 1 and align it with the lower mold 2, install four hook-wrapped ropes on the top end of the upper core 11, which extend to four directions and are connected with fixed pulleys and movable pulleys and further connected with the winch, so as to stabilize the state of the upper mold 1 and prevent it from rotating;

[0066] Step five: put down the upper mold 1 through the hoisting equipment to make the fixed arm 15 extend into the middle of the movable base core ring seat 22, control the buckle seat 152 and the hook head 43 to stagger with each other when stabilizing the state of the upper mold 1, so that the buckle seat 152 can pass through the hook head 43 and reach below the hook head 43, until the upper core 11 is pressed on the flange hole column 223 in the middle of the movable base core ring seat 22, start the mold fixing assembly 4, the telescopic cylinder 5 drives the movable pull arm 42 to descend, the movable pull arm 42 moves in the guide chute 411 through the guide wheel 421 and rotates when descending, so as to drive the hook head 43 to rotate and hook the buckle seat 152 of the fixed arm 15 downward, pull the fixed arm 15 downward to make the pressing surface block 12 further press on the movable base core ring seat 22 to form a core, thereby completing the splicing operation of the flywheel A casting mold.

[0067] It should be noted that the known mold surface and the surface inward to a certain thickness are sand layer surfaces, the certain thickness is set according to the needs of those skilled in the art, and the cavity surface is coated with permanent or semi-permanent release agent before splicing, and after splicing, the pouring step can be entered, the molten iron is poured into the cavity between the upper mold 1 and the lower mold 2 through the pouring port 123 on both sides, until the molten iron is full of the pouring lug 23, one is to ensure that the liquid level of the molten iron is higher than the cavity of the upper mold 1, so as to ensure the integrity of the molding, and the other is to form the pouring lug A3 of the flywheel A on both sides of the flywheel A, which is convenient for subsequent cutting and entering the finishing process, or directly entering the finishing stage by turning off the pouring lug A3;

[0068] Subsequently, the demolding is carried out, the telescopic cylinder 5 of the solidifying assembly 4 is started to push upward, the movable pull arm 42 is moved in the guide chute 411 through the guide wheel 421 and is rotated when rising, so as to drive the hook head 43 to rotate and release the overlaid state with the buckle seat 152 of the fixed arm 15, at this time, the fixed arm 15 loses the pulling force, the spring elastic element 14 in the upper core 11 drives the pressing block 12 to rise by lifting the clamping disc 151 upward, the pressing block 12 rises along the guide groove of the guide frame 13 to the upper side, since the pressing block 12 has multiple blocks and is arranged in combination with the upper core 11, the flywheel A has multiple gaps on the top surface for communicating and balancing the atmospheric pressure inside and outside the cavity, so that the upper mold 1 can be demolded from the flywheel A more easily, subsequently, the winch is started to drive the upper mold 1 to rise to a certain height, at this time, the telescopic cylinder 5 at the bottom end of the movable base ring seat 22 is started, the movable base ring seat 22 carrying the flange part A1 and the outer edge part A2 of the flywheel A is driven to rise, since the flange part A1 and the outer edge part A2 have the gaps formed by the movable base ring seat 22 and the lower ring seat 21 for communicating and balancing the atmospheric pressure inside and outside the cavity, the movable base ring seat 22 drives the flywheel A to rise more easily, at this time, the movable base ring seat 22 is also away from the bottom end of the pouring column 23, the pouring ears A3 on both sides of the flywheel A are exposed, at this time, the user can connect the pouring ears A3 on both sides through the forklift or the hoisting vehicle and the like, so as to quickly hoist and take away the flywheel A to perform the next step, and the upper and lower molds can be quickly returned to the original position after coating the demolding agent to continue the next casting operation.

[0069] The technical features of the above embodiments can be combined arbitrarily, in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered that it is within the scope of the present disclosure.

Claims

1. A split flywheel class casting mold, the structure of which comprises an upper mold and a lower mold, characterized in that: The upper die and the lower die are provided with a die frame outside, the upper die and the lower die are both split structure, the upper die is movably arranged on the top end of the die frame and is pressed on the lower die, the pressing range of the upper die and the lower die forms a cavity inside; The upper die comprises an upper core and a pressing block arranged around the upper core, the pressing block is movably arranged on the side end of the upper core, the upper core is provided with an elastic member inside to provide upward elastic force for the pressing block, the bottom end of the upper core and the pressing block is a working contact surface; The lower die comprises a lower core ring seat and a movable base core ring seat, the top end of the lower core ring seat and the movable base core ring seat is a working contact surface and cooperates with the bottom end of the upper core and the pressing block to form a cavity; The cavity part of the top end of the movable base core ring seat comprises two reference surfaces forming the center and the outer edge of the flywheel; The upper die further comprises a fixed arm connected with the elastic member and the movable pressing block, the fixed arm extends downward and is connected with a fixed die assembly arranged in the lower die and is pressed on the upper die.

2. A split flywheel mold as in claim 1, wherein: The movable base core ring seat comprises a flange cavity of the inner ring and an outer edge cavity of the outer ring, the middle part of the flange cavity is provided with a vertical hole, the flange cavity and the outer edge cavity form the flange part and the outer edge part of the flywheel respectively; The bottom end of the upper core is provided with an extended tubular structure and is gap-fitted with the hole in the middle part of the flange cavity of the movable base core ring seat; The surrounding of the hole of the flange cavity is provided with a vertical flange hole column and abuts against the upper core.

3. A split flywheel mold as set forth in claim 1 or 2, characterized in that: The area of the outer side of the upper core in contact with the pressing block is provided with an opening, the inner side of the pressing block is provided with a driving arm and extends to the inner side of the upper core through the opening; The fixed arm is provided with two clamping discs inside the upper core, the clamping disc at the bottom end abuts against the elastic member, the driving arm is clamped between the clamping discs and moves synchronously with the clamping discs in the vertical direction.

4. A split flywheel mold as set forth in claim 3, wherein: The fixed arm extends out of the tubular structure arranged at the bottom end of the upper core and extends downward; The fixed die assembly is fixedly arranged at the bottom end of the lower die, the fixed die assembly comprises a guide pipe and a telescopic cylinder arranged in the guide pipe, the top end of the fixed die assembly is clamped with a movable pull arm and is rotationally connected with the telescopic arm of the telescopic cylinder; The movable pull arm is provided with a guide wheel, the guide pipe is provided with an inclined guide chute, the movable pull arm moves in the guide chute through the guide wheel and cooperates with the guide pipe.

5. A split flywheel mold as defined in claim 4, wherein: The top end of the movable pull arm extends out of a section of extension and is provided with a hook head at the top end of the extension, the bottom end of the fixed arm outside the tubular structure is provided with a buckle seat, the buckle seat and the hook head are both semicircular or crescent and each occupies half of the projection area of the fixed arm on the horizontal plane; The projection of the extension on the horizontal plane only occupies one fourth of the projection area of the fixed arm on the horizontal plane and does not interfere with the movement path of the buckle seat, the path of the hook head is vertical spiral and interferes with the buckle seat below the hook head.

6. A split flywheel mold as set forth in claim 3, wherein: The outer side of the upper core is provided with a guide frame with an inclined guide slot, the middle part of the guide frame is provided with an opening and is located at the opening outside the upper core, the inner side of the pressing block is movably clamped on the guide slot of the guide frame through a movable roller; The angle between the bottom end of the inclined guide slot and the outer wall of the upper core is greater than 5°.

7. A split flywheel mold as in claim 2, wherein: The pressing block on both sides of the movable base mold ring seat is provided with a pouring opening and a straight-through internal cavity, the outer edge cavity edge on both sides of the movable base mold ring seat is also provided with a notch, and the pouring ear column is arranged at the notch on both sides of the movable base mold ring seat.

8. A split flywheel mold as in claim 2, wherein: The bottom end of the movable base mold ring seat is provided with a vertical limiting sliding rod, and the movable base mold ring seat retains a vertical movement freedom on the limiting sliding rod.

9. A split flywheel mold as in claim 1, wherein: The top end of the upper mold core is provided with a hook, the top end of the mold frame is provided with hoisting equipment, and the top end of the upper mold core is connected with the hoisting equipment through a rope or an iron chain.

10. A method of splicing a spliced flywheel class casting mold, characterized by: The spliced flywheel type casting mold is used, and the spliced flywheel type casting mold comprises the following steps: Step one: the mold frame is provided with a fixed mold assembly, a limiting sliding rod and a telescopic cylinder, the movable base mold ring seat is provided with a sliding sleeve at the bottom end, the center of the movable base mold ring seat and the sliding sleeve at the bottom end are aligned with the fixed mold assembly and the limiting sliding rod, the movable base mold ring seat is installed from top to bottom at the bottom end of the mold frame, the telescopic arm of the telescopic cylinder is connected with the bottom end of the movable base mold ring seat, and the fixed mold assembly is located in the center of the movable base mold ring seat; Step two: then the lower mold ring seat is nested into the movable base mold ring seat from top to bottom, the bottom end of the lower mold ring seat is fixed with the bottom end of the mold frame, and the pouring ear column is installed at the notch on both sides of the movable base mold ring seat; Step three: the elastic member is placed in the upper mold core, the fixed arm is inserted into the upper mold core, the plurality of pressing blocks are clamped on the guide groove of the guide frame through the movable roller, and the driving arm of the pressing block is inserted into the upper mold core and clamped between the clamping discs; Step four: the hook is installed at the top end of the upper mold core, the hoisting equipment is installed at the top end of the mold frame, the upper mold core is connected with the hoisting equipment through a rope or an iron chain, the upper mold is hoisted and aligned with the lower mold; Step five: the fixed arm is inserted into the movable base mold ring seat through the hoisting equipment, until the upper mold core is pressed on the flange hole column in the movable base mold ring seat, the fixed arm is pulled down by the fixed mold assembly, the pressing block is further pressed on the movable base mold ring seat to form a mold core, and the splicing operation of the flywheel type casting mold is completed.

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