A split-casting brake shoe and a split-casting device thereof

Abstract

The application relates to a split-casting brake shoe and a split-casting device thereof, and relates to the technical field of brake shoe casting devices. The device comprises a rack, a mounting disc rotatably arranged on the rack and a driving element for driving the mounting disc to rotate. An iron mold is arranged on the mounting disc. The iron mold is provided with a casting cavity and a casting opening communicated with the casting cavity. The iron mold comprises a fixed iron mold arranged on the mounting disc and a movable iron mold slidably arranged on the mounting disc. The side walls of the fixed iron mold and the movable iron mold are movably attached to each other. A discharging opening is arranged on the mounting disc at the iron mold. A molding assembly for molding the iron mold, a pretreatment assembly for preventing the iron mold from sticking and preheating treatment, and a mold opening and discharging assembly for the iron mold are arranged on the rack. The application has the effects of realizing integrated casting of the brake shoe, improving production efficiency, and improving the casting precision and strength of the brake shoe.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of brake shoe casting devices, in particular to a split-casting brake shoe and a split-casting device thereof. BACKGROUND

[0002] The brake shoe is a key friction element in a drum brake, which generates friction force by contacting with a brake drum to realize braking of a vehicle. The brake shoe comprises a circular-arc-shaped wing plate and two circular-arc-shaped webs fixed to the inner peripheral wall of the wing plate. The two webs are oppositely arranged, and a support rib is fixed at the connection between the wing plate and the webs. Uniformly distributed heat dissipation holes are formed in the wing plate, and fixing pin holes for mounting return springs are formed in the webs, and support holes for mounting cam blocks are formed in the webs.

[0003] At present, the brake shoe is usually cast by an iron type sand covering process. The iron type comprises an upper iron type and a lower iron type, and the upper iron type cooperates with the lower iron type to form a complete casting mold. During production, the iron type is first preheated, then sand is shot into the iron type to uniformly attach a 6-10 mm thick sand layer to the inner wall of the iron type, then the iron type is opened, and the surface of the sand layer is checked for uniformity, sand holes or cracks, then the upper iron type is combined with the lower iron type, and casting is performed to realize the casting of the brake shoe. Then, the heat dissipation holes, the fixing pin holes and the support holes can be machined by drilling equipment, or the sand cores can be fixed to the sand layer by an adhesive during the opening and checking to model the heat dissipation holes, the fixing pin holes and the support holes, thereby realizing the integrated casting of the brake shoe.

[0004] According to the related art, since the iron type is split into upper and lower parts, the split surface of the iron type is located at the center line of the outer peripheral wall of the wing plate, and after casting, a clear joint line is formed on the outer peripheral wall of the wing plate, i.e. the friction surface of the brake shoe. At this time, the brake shoe needs to be turned to the designed size by a technician, and a machining allowance needs to be reserved during casting, which increases the time cost and material cost. In addition, if the heat dissipation holes, the fixing pin holes and the support holes are machined by drilling equipment, continuous drilling can easily cause stress concentration around the holes, affecting the fatigue resistance of the brake shoe, thereby reducing the strength of the brake shoe. If the heat dissipation holes, the fixing pin holes and the support holes are modeled by sand cores, the technician needs to fix the preformed sand cores to the specified position, and the brake shoe modeling is complex, which is not convenient for the technician to position and fix the sand cores, and can easily introduce artificial errors, thereby reducing the casting accuracy of the brake shoe. Therefore, improvement is needed. SUMMARY

[0005] In order to realize the integrated casting of the brake shoe, improve the production efficiency, and at the same time improve the casting accuracy and strength of the brake shoe, the application provides a split-casting brake shoe and a split-casting device thereof.

[0006] The first aspect of the application provides a parting casting brake shoe parting casting device, which adopts the following technical scheme:

[0007] A parting casting brake shoe parting casting device, comprising a rack, a mounting disc rotatably arranged on the rack, and a driving member for driving the mounting disc to rotate, wherein the mounting disc is provided with an iron mold, the iron mold is provided with a casting cavity and a casting opening communicated with the casting cavity, and the iron mold comprises a fixed iron mold arranged on the mounting disc and a movable iron mold slidably arranged on the mounting disc, the side walls of the fixed iron mold and the movable iron mold are movably attached to each other, and the mounting disc is provided with a discharging opening at the iron mold;

[0008] Further comprising sand shooting equipment for sand coating molding of the iron mold and conveying equipment for transferring the brake shoe body, wherein the rack is provided with a molding assembly for molding the iron mold, a pretreatment assembly for preventing sticking and preheating treatment of the iron mold, and a mold opening and discharging assembly for the iron mold;

[0009] The molding assembly comprises a first protrusion arranged on the movable iron mold, wherein the outer peripheral wall of the first protrusion is in a circular arc shape corresponding to the inner peripheral wall of the wing plate, the fixed iron mold is provided with a first recess corresponding to the first protrusion, the inner peripheral wall of the first recess corresponds to the outer peripheral wall of the wing plate, and the outer peripheral wall of the first protrusion is provided with a second recess corresponding to the web and the support rib;

[0010] The iron mold is movably arranged with a first sand core corresponding to the support hole and a second sand core corresponding to the fixed pin hole, the fixed iron mold is slidably arranged with a plurality of molding columns, the plurality of molding columns correspond one-to-one to the plurality of heat dissipation holes, one end of the molding column movably protrudes from the inner peripheral wall of the first recess and movably attaches to the outer peripheral wall of the first protrusion, and the rack is provided with a synchronizing member for driving the molding column to slide and a placing assembly for installing and cleaning the first sand core and the second sand core;

[0011] When the fixed iron mold and the movable iron mold are attached, the first protrusion, the first sand core, the second sand core, and the molding column form a casting cavity, the casting cavity with a sand coating layer is attached to the outer surface of the brake shoe body, and the casting cavity is communicated with the casting cavity.

[0012] By adopting the above technical scheme, when processing is required, the iron mold corresponds to the placing assembly, the protruding end of the molding column is attached to the outer peripheral wall of the first protrusion, the fixed iron mold and the movable iron mold are attached, and the first protrusion, the first sand core, the second sand core, and the molding column form a casting cavity, at this time, the iron mold is in a mold closing state, the placing assembly installs the first sand core and the second sand core in the iron mold, and then the pretreatment assembly prevents sticking and preheats the iron mold, facilitating subsequent demolding.

[0013] Then the driving part drives the mounting disc to rotate intermittently until the iron mold moves to the corresponding sand shooting device, and the sand shooting device performs sand coating molding on the iron mold. At this time, the preheated iron mold is beneficial to the solidification of the sand coating layer, improves the processing efficiency, reduces the temperature gradient inside and outside the iron mold during casting, reduces the risk of deformation of the iron mold, and improves the stability of the size of the iron mold.

[0014] After the sand coating molding is completed, the mounting disc continues to rotate until the iron mold moves away from the sand shooting device. At this time, the blanking assembly opens the mold for the iron mold, and then the technician checks whether the sand coating layer has defects such as cracks and peeling, and adjusts the sand shooting device to reduce the occurrence of repeated defects in batch production and improve the yield of the brake shoe body. At the same time, the technician can adjust the frequency of sampling inspection according to the cast brake shoe body.

[0015] After the inspection is completed, the blanking assembly makes the iron mold in the closed mold state, and then the mounting disc continues to rotate until the iron mold moves to the casting position. Then the technician pours the molten iron into the casting opening, and the molten iron enters the casting cavity through the buffer flow of the casting cavity, realizing the casting of the brake shoe body and improving the quality of the casting.

[0016] Then the mounting disc continues to rotate, and the synchronous part drives the molding column to slide, so that the molding column is separated from the heat dissipation holes on the brake shoe body. Then the blanking assembly opens the mold for the iron mold. At this time, the molding column is not easy to hinder the demolding of the brake shoe body, until the iron mold moves to the corresponding conveying device. At this time, the blanking assembly completes the opening and blanking, so that the brake shoe body falls from the blanking opening to the conveying device under the action of gravity, and the brake shoe body is transported to the next process position by the conveying device, realizing the integrated casting and forming of the brake shoe body, improving the production efficiency, and improving the casting precision and strength of the brake shoe body.

[0017] When the iron mold is closed, the wing plate corresponds to the first groove on the fixed iron mold, and the parting surface of the fixed iron mold and the movable iron mold avoids the wing plate arc surface, so that the wing plate outer arc surface does not need to be machined twice due to the parting surface. The mold line reduces the time cost and material cost of machining.

[0018] After casting is completed, the mounting disc continues to rotate until the iron mold corresponds to the placing assembly. At this time, the blanking assembly makes the iron mold in the closed mold state, and then the placing assembly cleans the first sand core and the second sand core remaining in the iron mold, and places new first sand core and second sand core. Then repeat the above steps to realize the recycling of the brake shoe body by the same iron mold, reduce the transfer time of the iron mold, and improve the production efficiency.

[0019] Optionally, the synchronizer comprises a plurality of sliding plates slidingly arranged in the fixed iron mold, the plurality of sliding plates are uniformly arranged along the inner circumferential wall of the first groove, and the sliding plates slide along the radial direction of the inner circumferential wall of the first groove; the side of the modeling column away from the protruding end is detachably connected with the sliding plate, and the plurality of modeling columns are uniformly distributed on the plurality of sliding plates.

[0020] By adopting the above technical scheme, since the modeling column frequently slides, the size is prone to deviation due to wear, at this time, the detachable connection of the modeling column and the sliding plate facilitates the periodic replacement of the modeling column by the technician, thereby improving the stability of the size of the mold cavity, improving the casting precision of the brake shoe body, realizing the modeling of the heat dissipation holes in different directions, and facilitating the demolding of the brake shoe body.

[0021] Optionally, the synchronizer further comprises a guide plate slidingly arranged on the sliding plate, one end of the guide plate extends obliquely downward to the side away from the axis of the first protrusion, a guide groove corresponding to the guide plate is formed in the sliding plate, and the side wall of the guide plate is movably abutted against the inner side wall of the guide groove; a synchronous frame is arranged in the fixed iron mold and is arranged in a lifting manner; the two ends of the plurality of guide plates are connected with the synchronous frame; and a first power element is arranged on the mounting disc to drive the synchronous frame to lift.

[0022] By adopting the above technical scheme, when the mold needs to be opened and discharged, the first power element drives the synchronous frame and the guide plate to synchronously rise, since one end of the guide plate extends obliquely downward to the side away from the axis of the first protrusion, and the side wall of the guide plate is movably abutted against the inner side wall of the guide groove, at this time, the guide plate drives the sliding plate to slide along the radial direction of the inner circumferential wall of the first groove away from the movable iron mold, and drives the plurality of modeling columns to synchronously slide, so that the modeling column is separated from the heat dissipation hole of the brake shoe body, facilitating subsequent demolding.

[0023] When the iron mold needs to be prevented from sticking and preheated, the first power element works to drive the modeling column to slide close to the movable iron mold, so that the protruding end of the modeling column is movably attached to the outer circumferential wall of the first protrusion, and the modeling of the heat dissipation hole is realized.

[0024] Optionally, the iron mold is provided with mounting holes for mounting the first sand core and the second sand core; the placing assembly comprises two plug-in rods arranged in a lifting manner on the rack, the two plug-in rods correspond to the two mounting holes one by one and are movably inserted into the mounting holes; a containing box is arranged on the rack; the prefabricated first sand core and the second sand core are movably placed in the containing box, and the outer circumferential wall of the first sand core and the outer circumferential wall of the second sand core are movably attached to the outer circumferential wall of the corresponding plug-in rod; the containing box is arranged obliquely, and the lowest end of the bottom of the containing box is provided with discharge holes corresponding to the two mounting holes; the plug-in rods movably block the discharge holes; and a second power element is arranged on the rack to drive the plug-in rods to lift.

[0025] By adopting the technical scheme, when the iron mold corresponds to the containing box, the two mounting holes correspond to the two discharge holes one by one, the plug-in rod plugs the discharge hole, then the second power member drives the plug-in rod to descend and insert into the mounting hole, and the residual first sand core and the second sand core in the mounting hole are pushed into the casting cavity, then the second power member drives the plug-in rod to ascend, so that the plug-in rod is separated from the mounting hole, at this time, the discharging assembly completes the opening and closing of the iron mold once, and the residual first sand core and the second sand core are cleaned.

[0026] Then the plug-in rod continues to ascend until the first sand core and the second sand core are separated from the corresponding plug-in rod, at this time, the first sand core and the second sand core slide to the discharge hole under the action of gravity and fall into the mounting hole, at this time, the second power member drives the plug-in rod to descend and press-fit the first sand core and the second sand core in place, reduces the error caused by manually placing the sand core in the closing mold, realizes the automatic installation and cleaning of the first sand core and the second sand core, improves the installation precision of the first sand core and the second sand core, improves the casting precision of the brake shoe body, and improves the production efficiency.

[0027] Optionally, the discharging assembly comprises a first ejector pin slidingly arranged on the fixed iron mold, one end of the first ejector pin is movably attached to the inner wall of the first groove, and the other end of the first ejector pin protrudes from the side wall of the fixed iron mold, a second ejector pin is slidingly arranged on the movable iron mold, one end of the second ejector pin is movably attached to the outer wall of the first protrusion, and the other end of the second ejector pin protrudes from the side wall of the movable iron mold, a third power member for driving the movable iron mold to slide is arranged on the mounting disc, and a pusher for driving the first ejector pin and the second ejector pin to slide is arranged on the rack.

[0028] By adopting the technical scheme, when the iron mold moves to correspond to the conveying device, the pusher drives the first push rod and the second push rod to slide, at this time, the first push rod abuts against and drives the brake shoe body to move away from the fixed iron mold, the second push rod moves away from the brake shoe, and the third power member drives the movable iron mold to slide away from the fixed iron mold, so that the iron mold is opened, at this time, the second push rod slides towards the fixed iron mold relative to the movable iron mold, so that the second push rod abuts against and drives the brake shoe body to slide away from the movable iron mold, so that the brake shoe body is separated from the iron mold, and the iron mold is opened and discharged.

[0029] Optionally, the pushing piece comprises a first ring track and a second ring track arranged on the rack, the first ring track and the second ring track are coaxially arranged with the mounting disc, the first ring track is provided with a first protrusion, the second ring track is provided with a second protrusion and a third protrusion, the first protrusion corresponds to the second protrusion, and the protruding radii of the first protrusion, the second protrusion and the third protrusion increase in turn, the bottom of the first ring track and the second ring track is provided with a sliding groove corresponding to the shape thereof, the sliding wheel at the end of the first push rod and the second push rod away from each other, the sliding wheel on the first push rod is movably arranged in the sliding groove on the first ring track, the sliding wheel on the second push rod is movably arranged in the sliding groove on the second ring track, and the outer circumferential wall of the sliding wheel movably abuts against the inner side wall of the sliding groove.

[0030] By adopting the above technical scheme, when the mounting disc rotates, the first push rod and the second push rod on the iron mold are driven to move synchronously, and the sliding wheel is driven to slide in the sliding groove, at this time, the first push rod keeps abutting against the inner circumferential wall of the first groove, and the second push rod keeps abutting against the outer circumferential wall of the first protrusion.

[0031] When the sliding wheel on the first push rod moves to correspond to the first protrusion, the sliding wheel on the second push rod moves to correspond to the second protrusion, so as to realize the synchronous sliding of the first push rod and the second push rod, at this time, the first push rod separates the brake shoe body from the fixed iron mold, and the third power piece works to separate the movable iron mold from the fixed iron mold, at this time, the second push rod separates the brake shoe body from the movable iron mold, since the protruding radii of the first protrusion, the second protrusion and the third protrusion increase in turn, the distance between the first push rod and the second push rod increases at this time, so as not to easily hinder the falling of the brake shoe body, thereby realizing the mold opening and blanking of the iron mold.

[0032] When the sliding wheel on the second push rod moves to correspond to the third protrusion, the first push rod keeps abutting against the inner circumferential wall of the first groove, and the second push rod slides away from the fixed iron mold, at the same time, the third power piece drives the movable iron mold to slide away from the fixed iron mold, and the relative position between the second push rod and the movable iron mold keeps constant, so as to realize the mold opening without damaging the sand layer on the second push rod.

[0033] If the brake shoe body is pushed out by a hydraulic cylinder or a linear motor, the hydraulic cylinder or the linear motor needs to be fixed on the iron mold, and the high temperature during preheating and casting is easy to cause electrical failure and reduce the stability of equipment operation, by the above scheme, the above problems are effectively solved, and the power source is saved.

[0034] Optionally, the inner circumferential wall of the first groove is provided with a plurality of accommodating holes corresponding to the plurality of shaping columns, the fixed iron mold is provided with a communication hole communicating the plurality of accommodating holes, and the shaping column movably seals the communication hole; the pretreatment assembly comprises a tee joint arranged on the fixed iron mold and a liquid storage tank arranged on the mounting disc, the liquid storage tank is used for storing the release agent, one end of the tee joint is in communication with the communication hole, and the other two ends of the tee joint are respectively in communication with a gas pump and a liquid pump, the input end of the liquid pump is in communication with the liquid storage tank, and the rack is provided with a far-infrared heater movably corresponding to the iron mold.

[0035] By adopting the above technical scheme, after the iron mold is opened and discharged, the shaping column is separated from the heat dissipation hole, so that the communication hole is in an open state, at this time, the gas pump works, and high-pressure gas enters the mold cavity through the tee joint, the communication hole and the accommodating hole in sequence, which helps to separate the brake shoe body from the iron mold and facilitates subsequent opening and discharging.

[0036] When the first sand core and the second sand core are cleaned, the iron mold is in a closed state, at this time, the high-pressure gas drives a small amount of sand particles remaining in the mold cavity to move, thereby achieving cleaning of the mold cavity, then, after the iron mold is opened and closed once, the high-pressure gas blows the residual sand particles in the mold cavity away from the mold cavity, thereby achieving cleaning of the mold cavity, and after the iron mold is closed, the liquid pump works to pump the release agent in the liquid storage tank into the mold cavity through the tee joint, the communication hole and the accommodating hole, thereby achieving spraying of the release agent and achieving anti-sticking treatment.

[0037] Then, the mounting disc rotates to move the iron mold to correspond to the far-infrared heater, thereby achieving preheating of the iron mold, and the heat generated by preheating accelerates drying of the iron mold, thereby facilitating subsequent sand coating molding.

[0038] Optionally, a plurality of iron molds are provided, the plurality of iron molds are uniformly arranged along the circumferential direction of the mounting disc, the driving member comprises an inner ring gear coaxially arranged on the mounting disc and a driving gear rotatably arranged on the rack, the driving gear is engaged with the inner ring gear, and the rack is provided with a fourth power member for driving the driving gear to rotate.

[0039] By adopting the above technical scheme, the fourth power member intermittently drives the driving gear to rotate, thereby driving the inner ring gear to rotate, so as to achieve intermittent rotation of the mounting disc, and by arranging a plurality of iron molds, synchronous opening and discharging, cleaning of the first sand core, the second sand core and the mold cavity, anti-sticking preheating treatment, sand coating molding and checking of the sand coating layer of one iron mold can be performed simultaneously, thereby achieving cyclic processing and improving processing efficiency.

[0040] In a second aspect, the application provides a split-casting brake shoe, which adopts the following technical scheme:

[0041] The application discloses a split-cast brake shoe, which comprises a wing plate and two oppositely arranged web plates, the wing plate is semicircular, the web plates are connected with the inner circumferential wall of the wing plate, and a plurality of support ribs are arranged on the connection between the web plates and the wing plate and are uniformly and parallelly arranged along the circumferential direction of the wing plate.

[0042] A plurality of heat dissipation holes are uniformly arranged on the outer circumferential wall of the wing plate, a support hole is arranged at one end of the web plate, a circular arc opening is arranged at the other end of the web plate, a fixing pin hole for mounting a spring is further arranged on the web plate, the thickness of the web plate at the support hole, the circular arc opening and the fixing pin hole is greater than that of other parts, and a support frame is arranged on the inner circumferential wall of the wing plate along the circular edge of the wing plate.

[0043] By adopting the above technical scheme, the circular arc opening is convenient for technicians to install the brake shoe body, the support hole is convenient for technicians to install and replace a cam top block for driving the brake shoe body to rotate, the support frame and the support rib are arranged to reduce the thickness of the wing plate and the web plate while ensuring the bending and torsion resistance of the brake shoe body, reduce the risk of deformation or even fracture of the brake shoe body caused by stress concentration, so as to realize the lightweight design of the brake shoe body, reduce the material cost of casting, and the parallelly arranged support ribs are convenient for demolding of the brake shoe body after casting.

[0044] Meanwhile, the two web plates are arranged, and the thickness of the web plates is different at different positions, so that the strength of the brake shoe body is ensured, and the lightweight design of the brake shoe body is further realized.

[0045] Meanwhile, the support frame and the support rib can effectively disperse the load when braking, so that the wing plate is uniformly stressed when braking, and the stability of the braking performance of the brake shoe body is improved.

[0046] In summary, the application has at least one of the following beneficial technical effects:

[0047] 1. When the iron mold is closed, the protruding end of the molding column is attached to the outer wall of the first protrusion, at which time the fixed iron, the movable iron, and the first protrusion, the first sand core, the second sand core, and the molding column form a casting cavity, realizing the integrated forming of the brake shoe body, improving production efficiency, and further improving the casting precision and strength of the brake shoe, and at this time the second power member drives the insertion rod to press-fit the first sand core and the second sand core into place, and the first power member drives the synchronous frame and the guide plate to synchronously ascend and descend, since one end of the guide plate extends obliquely downward to the side away from the axis of the first protrusion, and the side wall of the guide plate is movably attached to the inner side wall of the guide groove, realizing the sliding of the sliding plate and the molding column along the radial direction of the inner wall of the first groove, realizing the molding of the heat dissipation holes in different directions, and facilitating subsequent demolding, realizing automatic molding, reducing the error caused by manually placing the sand core in the re-molding, and thus improving the casting precision of the brake shoe body;

[0048] 2. By setting the first sand core, the second sand core, and the molding column, the brake shoe body is integrally cast and formed, without the need for secondary processing of the heat dissipation holes, the fixed pin holes, and the support holes, and since the iron mold is closed, the wing plate corresponds to the first groove on the fixed iron, and the parting surface of the fixed iron and the movable iron avoids the wing plate arc surface, without the need for secondary cutting processing of the wing plate outer arc surface due to the parting surface, reducing the influence of the thermal stress generated by secondary cutting processing on the fatigue resistance of the wing plate, improving the performance of the brake shoe, and reducing the time cost and material cost of processing;

[0049] 3. When the mold is opened and the material is discharged, the rotation of the iron mold causes the first ejector rod and the second ejector rod to rotate around the axis of the mounting disc, causing the sliding wheel to slide in the sliding groove, realizing the sliding of the first ejector rod away from the fixed iron, causing the brake shoe body to separate from the fixed iron, and simultaneously, the third power member drives the movable iron to slide away from the fixed iron, realizing the sliding of the second ejector rod relative to the movable iron in the direction of approaching the fixed iron, and at this time, the distance between the first ejector rod and the second ejector rod increases, which does not easily hinder the falling of the brake shoe body, thereby realizing the discharging, if the brake shoe body is ejected by a hydraulic cylinder or a linear motor, the hydraulic cylinder or the linear motor needs to be fixed on the iron mold, and the high temperature during preheating and casting is easy to cause electrical faults, reducing the stability of the equipment operation, and through the above scheme, the above problems are effectively solved, and the power source is saved;

[0050] 4. By driving the mounting disc to gapingly rotate, when one iron mold is cast, the iron mold is intermittently moved, realizing the simultaneous opening of the other iron molds, the cleaning of the first sand core, the second sand core, and the casting cavity, the anti-sticking preheating treatment, the sand coating molding, and the inspection of the sand coating layer, realizing cyclic processing, reducing the transfer time of the iron mold, and improving the processing efficiency;

[0051] 5. By setting the support frame, support rib and the difference design of the web thickness, the bending and torsion resistance of the brake shoe body is ensured, the lightweight design of the brake shoe body is realized, the material cost of casting is reduced, and during braking, the support frame can effectively disperse the load, so that the friction lining installed on the outer peripheral wall of the wing plate is in uniform contact with the brake drum, thereby improving the stability of the brake shoe body braking performance. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 is the overall structure schematic diagram of the embodiment of the present application;

[0053] Figure 2 is the connection structure schematic diagram of the mounting disc, the inner gear ring and the rack;

[0054] Figure 3 is the connection structure schematic diagram of the fixed iron type, the molding column and the molding block;

[0055] Figure 4 is the connection structure schematic diagram of the movable iron type, the first sand core and the second sand core;

[0056] Figure 5 is the connection structure schematic diagram of the fixed iron type, the sliding plate, the guide plate and the synchronous frame;

[0057] Figure 6 is the connection structure schematic diagram of the plug-in rod, the containing box and the second power element;

[0058] Figure 7 is the connection structure schematic diagram of the first sand core, the second sand core and the plug-in rod;

[0059] Figure 8 is Figure 1 is the local enlarged schematic diagram of part A in

[0060] Figure 9 is the overall structure schematic diagram of the brake shoe body.

[0061] Label: 1, rack; 11, mounting disc; 12, driving piece; 121, inner gear ring; 122, driving gear; 123, fourth power piece; 124, support wheel; 125, guide wheel; 13, discharging port; 14, lightening hole; 2, iron mold; 21, fixed iron mold; 22, movable iron mold; 23, pouring cavity; 24, pouring port; 25, mounting hole; 26, containing hole; 27, communicating hole; 28, cover plate; 3, molding assembly; 31, first protrusion; 32, first groove; 33, second groove; 34, first sand core; 35, second sand core; 36, molding column; 37, molding block; 38, mold cavity; 39, synchronous piece; 391, sliding plate; 392, guide plate; 393, guide groove; 394, synchronous frame; 395, first power piece; 4, placing assembly; 41, plug-in rod; 42, containing box; 43, discharging hole; 44, second power piece; 5, discharging assembly; 51, first ejector rod; 52, second ejector rod; 53, third power piece; 54, pushing piece; 541, first ring rail; 542, second ring rail; 543, first protrusion; 544, second protrusion; 545, third protrusion; 546, sliding wheel; 547, sliding groove; 6, pretreatment assembly; 61, tee joint; 62, liquid storage tank; 63, liquid pumping pump; 64, far infrared heater; 7, sand shooting equipment; 8, conveying equipment; 9, brake shoe body; 91, wing plate; 92, web; 93, support rib; 94, heat dissipation hole; 95, support hole; 96, circular arc port; 97, support frame; 98, fixing pin hole. DETAILED DESCRIPTION

[0062] The following will be described in detail below with reference to the accompanying drawings. Figures 1-9 The application is further described in detail.

[0063] The embodiment of the application discloses a parting casting brake shoe parting casting device. Figure 1 and Figure 2The parting casting brake shoe parting casting device includes a rack 1 placed on the ground, a mounting disc 11 rotationally connected to the rack 1, and a driving member 12 for driving the mounting disc 11 to rotate, the rotation axis of the mounting disc 11 is consistent with the height direction of the rack 1, in order to reduce the weight of the mounting disc 11, the mounting disc 11 is annular, and the mounting disc 11 is provided with a lightening hole 14 for lightening, the top of the mounting disc 11 is fixed with an iron mold 2, the iron mold 2 is provided in plurality, and the plurality of iron molds 2 are uniformly arranged along the circumferential direction of the mounting disc 11, the iron mold 2 includes a fixed iron mold 21 fixed on the mounting disc 11 and a movable iron mold 22 slidingly connected to the mounting disc 11, the sliding direction of the movable iron mold 22 is consistent with the radial direction of the mounting disc 11, the side walls of the fixed iron mold 21 and the movable iron mold 22 are movably attached to each other, the mounting disc 11 is provided with a blanking port 13 at the iron mold 2, the iron mold 2 is provided with a casting cavity 23 and a casting port 24 communicating with the casting cavity 23, the casting cavity 23 is provided with two at the casting port 24, and the two casting cavities 23 and the two casting ports 24 are oppositely arranged.

[0064] The ground is also fixed with a sand shooting equipment 7 for sanding the iron mold 2 and a conveying equipment 8 for conveying the brake shoe body 9 formed by casting, the sand shooting equipment 7 and the conveying equipment 8 are arranged at intervals, the sand shooting equipment 7 is a sand shooting iron mold sanding machine in the application, the conveying equipment 8 is a conveying belt, the iron mold 2 is provided with twelve in the application, in other embodiments, the iron mold 2 can also be five, seven, ten or more, the arrangement mode is consistent with the application and the synchronous performance of different processes can be realized.

[0065] Referring to Figure 1 and Figure 2 , the driving member 12 includes an inner gear ring 121 coaxially fixed on the inner wall of the mounting disc 11 and a driving gear 122 rotationally connected to the rack 1, the rotation axis of the driving gear 122 is parallel to the rotation axis of the mounting disc 11, the driving gear 122 is engaged with the inner gear ring 121, the rack 1 is provided with a fourth power member 123 for driving the brake gear to rotate, the fourth power member 123 is a driving motor in the application.

[0066] Referring to Figure 1 and Figure 2In order to improve the stability of the rotation of the mounting disc 11, the rack 1 is rotationally connected with support wheels 124 and guide wheels 125, the support wheels 124 and the guide wheels 125 are provided in multiple groups, the multiple groups of guide wheels 125 are evenly arranged along the circumferential direction of the mounting disc 11, each group of support wheels 124 includes two oppositely arranged support wheels 124, the two support wheels 124 are located at the bottom of the mounting disc 11, and the outer circumferential wall of the support wheel 124 is movably attached to the bottom wall of the mounting disc 11, each group of guide wheels 125 includes two oppositely arranged guide wheels 125, the outer circumferential walls of the two guide wheels 125 are movably attached to the opposite two side walls of the mounting disc 11, the rotation axis of the support wheel 124 is consistent with the radial direction of the mounting disc 11, and the rotation axis of the guide wheel 125 is parallel to the rotation axis of the mounting disc 11.

[0067] In order to realize the integrated casting forming of the brake shoe body 9, the rack 1 is provided with a molding assembly 3 for molding the inside of the iron mold 2, referring to Figure 2 、 Figure 3 and Figure 4 , the molding assembly 3 includes a first protrusion 31 fixed to the movable iron mold 22, the outer circumferential wall of the first protrusion 31 is in a circular arc shape corresponding to the inner circumferential wall of the wing plate 91, the fixed iron mold 21 is provided with a first recess 32 corresponding to the first protrusion 31, the inner circumferential wall of the first recess 32 corresponds to the outer circumferential wall of the wing plate 91, and the outer circumferential wall of the first protrusion 31 is provided with a second recess 33 corresponding to the web plate 92 and the support rib 93, the second recess 33 is in a grid shape of two horizontal and three vertical.

[0068] The first sand core 34 corresponding to the support hole 95 and the second sand core 35 corresponding to the fixed pin hole 98 are movably installed in the iron mold 2, the side wall of the first sand core 34 and the second sand core 35 close to the mounting disc 11 is movably attached to the side wall of the second recess 33 close to the mounting disc 11, and the axes of the first protrusion 31, the first sand core 34 and the second sand core 35 are consistent with the axis of the mounting disc 11, a plurality of molding columns 36 are slidably connected in the iron mold 2, the sliding direction of the molding column 36 is consistent with the radial direction of the outer circumferential wall of the first recess 32, the plurality of molding columns 36 correspond one-to-one to the plurality of heat dissipation holes 94, one end of the molding column 36 movably protrudes from the inner circumferential wall of the first recess 32 and movably attaches to the outer circumferential wall of the first protrusion 31.

[0069] When the fixed iron mold 21 is attached to the movable iron mold 22, the first protrusion 31, the first sand core 34, the second sand core 35 and the molding column 36 form a casting cavity 38, the casting cavity 38 with a sand coating is attached to the outer surface of the brake shoe body 9, and the casting cavity 38 is in communication with the pouring cavity 23.

[0070] In order to drive the molding column 36 to slide and facilitate the demolding of the cast brake shoe body 9, referring to Figure 5The synchronous member 39 comprises a plurality of sliding plates 391 slidably connected in the fixed iron mold 21, the plurality of sliding plates 391 are evenly arranged along the inner circumferential wall of the first groove 32, and the plurality of sliding plates 391 slide along the radial direction of the inner circumferential wall of the first groove 32. In the present application, the sliding plates 391 are provided as ten, and in other embodiments, the sliding plates 391 can also be provided as three, five, six or the like, according to the distribution of the heat dissipation holes 94. The two sliding plates 391 located on the side are fixed with a shaped block 37, the adjacent two side walls of the shaped block 37 are movably attached to the side wall of the wing plate 91 and the outer arc surface of the web 92, respectively. A plurality of shaped columns 36 are evenly distributed on the remaining eight sliding plates 391, and the shaped column 36 is detachably connected to the sliding plate 391 away from the protruding end thereof.

[0071] Due to the frequent sliding of the shaped column 36, the size may deviate due to wear. At this time, through the detachable connection of the shaped column 36 and the sliding plate 391, the shaped column 36 can be replaced by the technician regularly, thereby improving the stability of the size of the mold cavity 38, improving the casting precision of the brake shoe body 9, realizing the shaping of the heat dissipation holes 94 in different directions, and facilitating the demolding of the brake shoe body 9.

[0072] In order to drive the plurality of shaped columns 36 to slide synchronously, with reference to Figure 5 The synchronous member 39 further comprises a guide plate 392 slidably connected to the sliding plate 391, the sliding direction of the guide plate 392 is parallel to the rotation axis of the mounting disc 11, one end of the guide plate 392 extends downwardly away from the side of the axis of the first protrusion 31, the sliding plate 391 is provided with a guide groove 393 corresponding to the guide plate 392, and the side wall of the guide plate 392 is movably abutted against the inner side wall of the guide groove 393. The synchronous frame 394 is connected to the sliding plate 391, the sliding direction of the synchronous frame 394 is consistent with the sliding direction of the guide plate 392, the two ends of the plurality of guide plates 392 are connected to the synchronous frame 394, and the mounting disc 11 is provided with the first power member 395 for driving the synchronous frame 394 to ascend and descend. In the present application, the first power member 395 is provided as an electric push rod, and the electric push rod is fixed to the bottom of the mounting disc 11. In order to facilitate the installation and dismounting of the sliding plate 391 and the shaped column 36, the side wall of the fixed iron mold 21 away from the movable iron mold 22 is provided with a containing groove for the movement of the sliding plate 391, the guide plate 392 and the synchronous frame 394. The fixed iron mold 21 is detachably fixed with the cover plate 28 for plugging the containing groove through bolts.

[0073] In order to improve the placing progress of the first sand core 34 and the second sand core 35, the rack 1 is provided with a placing assembly 4 for installing and cleaning the first sand core 34 and the second sand core 35, with reference to Figure 6 and Figure 7The two installation holes 25 are provided at the top of the iron mold 2, and the placing assembly 4 comprises two plug-in rods 41 connected to the rack 1 in a lifting mode, the two plug-in rods 41 correspond to the two installation holes 25 one by one and are movably inserted into the installation holes 25, the plug-in rods 41 are located between the conveying device 8 and the sand shooting device 7, the rack 1 is fixed with a containing box 42 at the top, the prefabricated first sand core 34 and the second sand core 35 are vertically placed in the containing box 42, and the outer peripheral wall of the first sand core 34 and the outer peripheral wall of the second sand core 35 movably fit the outer peripheral wall of the corresponding plug-in rod 41, the containing box 42 is arranged in an inclined mode, the lowest end of the bottom of the containing box 42 is provided with discharge holes 43 corresponding to the two installation holes 25, the plug-in rods 41 movably block the discharge holes 43, and the rack 1 is provided with a second power member 44 for driving the plug-in rods 41 to lift, and the second power member 44 is an electric push rod in the application.

[0074] When the processing is needed, one of the iron molds 2 corresponds to the containing box 42, at this time, the protruding end of the molding column 36 is attached to the outer peripheral wall of the first protruding block 31, the fixed iron mold 21 and the movable iron mold 22 are attached, and the first protruding block 31, the first sand core 34, the second sand core 35 and the molding column 36 form a casting cavity 38, at this time, the iron mold 2 is in a mold closing state.

[0075] Meanwhile, the two installation holes 25 correspond to the two discharge holes 43 one by one, then the technician starts the equipment, the second power member 44 drives the plug-in rods 41 to descend and insert into the installation holes 25, and the first sand core 34 and the second sand core 35 remaining in the installation holes 25 after the last casting are pushed into the casting cavity 38, then the second power member 44 drives the plug-in rods 41 to ascend, so that the plug-in rods 41 are separated from the installation holes 25, at this time, the iron mold 2 is opened and closed once, and the residual sand particles in the casting cavity 38 are removed, so that the casting cavity 38 is cleaned.

[0076] Then the plug-in rods 41 continue to ascend until the first sand core 34 and the second sand core 35 are separated from the corresponding plug-in rods 41, at this time, the first sand core 34 and the second sand core 35 slide to the discharge holes 43 under the action of gravity and fall into the installation holes 25, at this time, the second power member 44 drives the plug-in rods 41 to descend and press-fit the first sand core 34 and the second sand core 35 to the position, reduces the error caused by manually placing the sand core in the remolding, realizes the automatic installation and cleaning of the first sand core 34 and the second sand core 35, improves the installation precision of the first sand core 34 and the second sand core 35, improves the casting precision of the brake shoe body 9 and improves the production efficiency.

[0077] Then the fourth power element 123 drives the driving gear 122 to rotate intermittently, drives the inner gear ring 121 to rotate, and drives the mounting disc 11 to rotate intermittently until the iron mold 2 corresponds to the sand covering equipment, at which time the sand shooting equipment 7 works and the pouring opening 24 acts as a sand shooting hole to cover sand molding for the casting cavity 38.

[0078] After the sand molding is completed, the fourth power element 123 drives the driving gear 122 to rotate intermittently, drives the inner gear ring 121 to rotate, and drives the mounting disc 11 to rotate intermittently until the iron mold 2 moves to the mold opening inspection position, then the technician opens the iron mold 2, checks whether the sand covering layer has cracks, peeling and other defects, and adjusts the sand shooting equipment 7 to reduce repeated defects in batch production and improve the yield of the brake shoe body 9. According to the cast brake shoe body 9, the frequency of sampling inspection can be adjusted.

[0079] Then the mounting disc 11 continues to rotate intermittently until the iron mold 2 rotates to the pouring position, and then the technician pours the molten iron into the pouring opening 24, and the molten iron enters the casting cavity 38 through the buffer flow of the pouring cavity 23, realizing the pouring of the brake shoe body 9 and improving the quality of the casting.

[0080] Then the mounting disc 11 continues to rotate intermittently, and the first power element 395 drives the synchronization frame 394 and the guide plate 392 to rise synchronously. Since one end of the guide plate 392 extends obliquely downward to the side away from the shaft center of the first protrusion 31, and the side wall of the guide plate 392 is in close contact with the inner side wall of the guide groove 393, at this time the guide plate 392 drives the sliding plate 391 to slide along the radius direction of the inner wall of the first groove 32 away from the movable iron mold 22, and drives the plurality of molding columns 36 to slide synchronously, so that the molding columns 36 are separated from the heat dissipation holes 94 of the brake shoe body 9.

[0081] Then the technician opens the iron mold 2, at which time the molding column 36 does not easily hinder the demolding of the brake shoe body 9, until the iron mold 2 moves to correspond to the conveying equipment 8, so that the brake shoe body 9 falls to the conveying equipment 8 by gravity through the feeding opening 13, and the brake shoe body 9 is transported to the next process position by the conveying equipment 8, realizing the integral casting molding of the brake shoe body 9, improving the production efficiency, and improving the casting precision and strength of the brake shoe body 9.

[0082] At the same time, when the iron mold 2 is closed, the wing plate 91 corresponds to the first groove 32 on the fixed iron mold 21, and the parting surface of the fixed iron mold 21 and the movable iron mold 22 avoids the arc surface of the wing plate 91, so that the wing plate 91 does not need to be machined twice to remove the mold line caused by the parting surface, reducing the time cost and material cost of machining.

[0083] The present application sets twelve iron molds 2, so that there is a certain amount of redundancy design of iron mold 2 between the casting process and the mold opening and discharging process, so that the iron mold 2 after casting has enough cooling time, thereby reducing the waiting time of the iron mold 2 after casting in the casting position, thereby improving the processing efficiency, and the synchronization of casting, mold opening and discharging, cleaning of the casting cavity 38, sand coating and mold opening inspection of the sand coating layer, realizing cyclic processing and improving processing efficiency.

[0084] Further, in order to realize the automatic opening and closing of the iron mold 2, facilitate the blanking of the cast forming brake shoe body 9, the rack 1 is provided with a blanking assembly 5, referring to Figure 1 and Figure 2 , the blanking assembly 5 includes a first ejector rod 51 slidingly connected to the fixed iron mold 21, the sliding direction of the first ejector rod 51 is parallel to the radial direction of the mounting disc 11, one end of the first ejector rod 51 is movably attached to the inner wall of the first recess 32, the other end of the first ejector rod 51 protrudes from the side wall of the fixed iron mold 21, the movable iron mold 22 is slidingly connected with a second ejector rod 52, the sliding direction of the second ejector rod 52 is parallel to the radial direction of the mounting disc 11, in order to avoid the support rib 93, the second ejector rod 52 is provided with two, and the two second ejector rods 52 are oppositely arranged, one end of the second ejector rod 52 is movably attached to the outer wall of the first protrusion 31, the other end of the second ejector rod 52 protrudes from the side wall of the movable iron mold 22, the mounting disc 11 is provided with a third power element 53 for driving the movable iron mold 22 to slide, in the present application, the third power element 53 is a hydraulic oil cylinder.

[0085] In order to drive the first ejector rod 51 and the second ejector rod 52 to slide, the rack 1 is provided with a pushing element 54, referring to Figure 2 、 Figure 3 and Figure 4, the pushing piece 54 includes a first ring track 541 fixed on the top of the rack 1 and a second ring track 542, the first ring track 541 and the second ring track 542 are coaxially arranged with the mounting disc 11, the first ring track 541 is fixed with a first protrusion 543, the second ring track 542 is fixed with a second protrusion 544 and a third protrusion 545, the first protrusion 543, the second protrusion 544 and the conveying device 8 correspond, and the first protrusion 543 and the second protrusion 544 are located directly above the conveying device 8, and the protruding radii of the first protrusion 543, the second protrusion 544 and the third protrusion 545 increase in turn, the bottoms of the first ring track 541 and the second ring track 542 are provided with sliding grooves 547 corresponding to themselves, and the ends of the first top rod 51 and the second top rod 52 away from each other are rotatably connected with sliding wheels 546, the rotating axes of the sliding wheels 546 are parallel to the rotating axis of the mounting disc 11, the sliding wheel 546 on the first top rod 51 is movably located in the sliding groove 547 on the first ring track 541, the sliding wheel 546 on the second top rod 52 is movably located in the sliding groove 547 on the second ring track 542, and the outer circumferential wall of the sliding wheel 546 movably abuts against the inner side wall of the sliding groove 547.

[0086] When the mounting disc 11 rotates, the first top rod 51 and the second top rod 52 on the iron mold 2 are driven to move synchronously, and the sliding wheel 546 is driven to slide in the sliding groove 547, at this time, the first top rod 51 keeps abutting against the inner circumferential wall of the first groove 32, and the second top rod 52 keeps abutting against the outer circumferential wall of the first protruding block 31.

[0087] When the sliding wheel 546 on the first top rod 51 moves to correspond to the first protrusion 543, the sliding wheel 546 on the second top rod 52 moves to correspond to the second protrusion 544, so as to realize the synchronous sliding of the first top rod and the second top rod 52, at the same time, the second power member 44 separates the molding column 36 from the heat dissipation hole 94, at this time, the first top rod 51 separates the brake shoe body 9 from the fixed iron mold 21, and the third power member 53 works to drive the movable iron mold 22 to slide and separate from the fixed iron mold 21, at this time, the second top rod 52 separates the brake shoe body 9 from the movable iron mold 22, since the protruding radii of the first protrusion 543, the second protrusion 544 and the third protrusion 545 increase in turn, the distance between the first top rod 51 and the second top rod 52 increases at this time, so as not to easily hinder the falling of the brake shoe body 9, thereby realizing the mold opening and discharging of the iron mold 2.

[0088] When the sliding wheel 546 on the second ejector rod 52 moves to the position corresponding to the third protrusion 545, the first ejector rod 51 keeps in contact with the inner wall of the first groove 32, the second ejector rod 52 slides away from the fixed iron mold 21, the third power element 53 drives the movable iron mold 22 to slide away from the fixed iron mold 21, and the second ejector rod 52 keeps the relative position with the movable iron mold 22 constant, so as to realize the mold opening and not to damage the sand layer on the second ejector rod 52.

[0089] If the brake shoe body 9 is pushed out by the hydraulic cylinder or linear motor, the hydraulic cylinder or linear motor needs to be fixed on the iron mold 2, and the high temperature during preheating and casting is easy to cause electrical failure and reduce the stability of equipment operation. The above scheme effectively solves the above problems and saves the power source.

[0090] Further, in order to prevent the iron mold from sticking and preheat treatment, the rack 1 is provided with a pretreatment assembly 6, referring to Figure 8 The inner wall of the first groove 32 is provided with a plurality of accommodating holes 26 corresponding to a plurality of modeling columns 36, the fixed iron mold 21 is provided with a communication hole 27 communicating the plurality of accommodating holes 26, and the modeling column 36 movably blocks the communication hole 27. The pretreatment assembly 6 includes a three-way joint 61 fixed on the fixed iron mold 21 and a liquid storage tank 62 fixed on the top of the mounting disc 11. The liquid storage tank 62 is used for storing the release agent. One end of the three-way joint 61 is communicated with the communication hole 27, and the other two ends of the three-way joint 61 are respectively communicated with a gas pump and a liquid pump 63. The input end of the liquid pump 63 is communicated with the liquid storage tank 62. The top of the rack 1 is fixed with a far-infrared heater 64. The far-infrared heater 64 is movably corresponding to the iron mold 2. The far-infrared heater 64 is arranged towards the mounting disc 11 and located between the accommodating box 42 and the sand shooting device 7.

[0091] After the iron mold 2 is opened and discharged, the modeling column 36 is separated from the heat dissipation hole 94, so that the communication hole 27 is in an open state. At this time, the gas pump works, and the high-pressure gas enters the casting cavity 38 through the three-way joint 61, the communication hole 27 and the accommodating hole 26 in turn, which is helpful to separate the brake shoe body 9 from the iron mold 2 and facilitate subsequent opening and discharging.

[0092] When the first sand core 34 and the second sand core 35 are cleaned, the iron mold 2 is in a closed state. At this time, the high-pressure gas drives a small amount of sand particles remaining in the casting cavity 38 to move, realizing the cleaning of the casting cavity 38. Then, with the completion of one opening and closing of the iron mold 2, the high-pressure gas blows the residual sand particles in the casting cavity 38 away from the casting cavity 38, realizing the cleaning of the casting cavity. After the iron mold 2 is closed, the liquid pump 63 works, and the release agent in the liquid storage tank 62 is pumped into the casting cavity 38 through the three-way joint 61, the communication hole 27 and the accommodating hole 26, realizing the spraying of the release agent, so as to realize the anti-sticking treatment and facilitate subsequent demolding.

[0093] Then, the mounting plate 11 rotates, causing the iron mold 2 to move to the position corresponding to the far-infrared heater 64, thereby preheating the iron mold 2. At this time, the preheated iron mold 2 is conducive to the solidification of the sand coating layer, improving processing efficiency, reducing the temperature gradient inside and outside the iron mold 2 during casting, reducing the risk of deformation of the iron mold 2, improving the dimensional stability of the iron mold 2, and accelerating the drying of the iron mold 2 through the preheating heat, which is convenient for subsequent sand coating molding.

[0094] The implementation principle of the molded casting brake shoe and its molded casting device in this application embodiment is as follows: When processing is required, the technician starts the equipment, the second power component 44 works, driving the insertion rod 41 to descend and insert into the mounting hole 25 of a lower iron mold 2, and pushes the first sand core 34 and the second sand core 35 remaining in the mounting hole 25 after the previous casting into the casting cavity 38. At the same time, the first power component 395 drives the synchronous frame 394 and the guide plate 392 to rise, driving the sliding plate 391 and the molding column 36 to slide, so that the molding column 36 separates from the heat dissipation hole 94, so that the connecting hole 27 is in an open state. Then the second power component 44 drives the insertion rod 41 to rise, so that the insertion rod 41 separates from the mounting hole 25. At this time, the air pump works, so that high-pressure gas The sand enters the receiving cavity and moves the small amount of sand particles remaining in the casting cavity 38. At this time, the third power component 53 works, causing the iron mold 2 to open and close once. During the mold opening, the residual sand particles in the casting cavity 38 are blown away, thus cleaning the casting cavity 38. After the iron mold 2 closes, the plug-in rod 41 continues to rise until the first sand core 34 and the second sand core 35 are separated from the corresponding plug-in rod 41. At this time, the first sand core 34 and the second sand core 35 slide towards the discharge hole 43 under gravity and fall into the mounting hole 25. At this time, the second power component 44 drives the plug-in rod 41 to descend and press the first sand core 34 and the second sand core 35 into place. Then, the liquid pump 63 works and pumps the release agent in the storage tank 62 into the casting cavity 38 to achieve the spraying of the release agent.

[0095] At the same time, the far-infrared heater 64 preheats the iron mold 2 below, which has been sprayed with release agent.

[0096] At the same time, the sand-shooting equipment 7 applies sand to the preheated iron mold 2 below for shaping.

[0097] Simultaneously, the sand coating of the iron mold 2 corresponding to the third protrusion 545 is completed, and the sliding wheel 546 on the second ejector 52 is located at the third protrusion 545 of the sliding groove 547, causing the second ejector 52 to slide away from the fixed iron mold 21. At the same time, the third power component 53 drives the movable iron mold 22 to slide away from the fixed iron mold 21 and maintain a constant relative position with the second ejector 52, thereby realizing the opening of the iron mold 2 without damaging the sand coating layer on the second ejector 52. Then, the technicians inspect the sand coating layer.

[0098] Meanwhile, the technician pours the iron mold 2 after having inspected the covering sand layer.

[0099] Meanwhile, the iron mold 2 corresponding to the conveying device 8 is completed and has been cooled to the mold opening and discharging temperature, meanwhile, the first power member 395 drives the synchronous frame 394 and the guide plate 392 to rise, drives the sliding plate 391 and the molding column 36 to slide, so that the molding column 36 is separated from the heat dissipation hole 94, at this time, the sliding wheel 546 on the first ejector rod 51 is located at the first protrusion 543 of the sliding groove 547, so that the first ejector rod 51 slides to the direction close to the movable iron mold 22, meanwhile, the sliding wheel 546 on the second ejector rod 52 is located at the third protrusion 545 of the sliding groove 547, so that the second ejector rod 52 slides to the direction away from the fixed iron mold 21, meanwhile, the third power member 53 drives the movable iron mold 22 to slide away from the fixed iron mold 21, so that the second ejector rod 52 slides to the direction close to the fixed iron mold 21 relative to the movable iron mold 22, and the distance between the first ejector rod 51 and the second ejector rod 52 is increased, so that the falling of the brake shoe body 9 is not easily hindered, so as to realize the mold opening and discharging, at this time, the brake shoe body 9 falls from the discharging port 13 to the conveying device 8 under the action of gravity, and the conveying device 8 transports the brake shoe body 9 to the next process position.

[0100] Then, the fourth power member 123 works to drive the driving gear 122 to rotate intermittently, drive the inner ring gear 121 to rotate, and thus drive the intermittent rotation of the mounting disc 11, so as to realize the rotation of the iron mold 2 and the cyclic casting processing of the brake shoe body 9.

[0101] The embodiment of the application further discloses a split-casting brake shoe. Figure 9 The split-casting brake shoe comprises a wing plate 91 and two oppositely arranged web plates 92, the wing plate 91 is in a semicircular arc shape, the web plates 92 are fixed to the inner circumferential wall of the wing plate 91, a plurality of support ribs 93 are fixed at the connection position of the web plates 92 and the wing plate 91, the plurality of support ribs 93 are arranged at intervals along the circumferential direction of the wing plate 91, and the plurality of support ribs 93 are arranged in parallel, so as to facilitate demolding after casting and forming, in the application, the number of the support ribs 93 is three, in other embodiments, according to the size of the brake shoe body 9 and different use requirements, the number of the support ribs 93 can also be two, five, six or more, and the arrangement mode is consistent with the application.

[0102] The plurality of heat dissipation holes 94 are evenly arranged on the outer peripheral wall of the wing plate 91 and are arranged along the radial direction of the wing plate 91. The support hole 95 is arranged at one end of the web plate 92, and the arc-shaped opening 96 is arranged at the other end of the web plate 92. The axis of the support hole 95 and the arc-shaped opening 96 is parallel to the axis of the wing plate 91. The fixing pin hole 98 for mounting the spring is further arranged on the web plate 92. The thickness of the web plate 92 at the support hole 95, the arc-shaped opening 96 and the fixing pin hole 98 is greater than the thickness of the rest of the web plate 92. The support frame 97 is arranged along the arc-shaped edge of the wing plate 91 on the inner peripheral wall of the wing plate 91.

[0103] The support frame 97, the support rib 93 and the differential design of the thickness of the web plate 92 ensure the bending and torsion resistance of the brake shoe body 9, realize the lightweight design of the brake shoe body 9, reduce the material cost of casting, and effectively disperse the load of the support frame 97 and the support rib 93 during braking, so that the wing plate 91 is uniformly stressed during braking, thereby improving the stability of the braking performance of the brake shoe body 9.

[0104] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A parting-casting device for brake shoes, characterized in that: The device includes a frame, a mounting plate rotatably mounted on the frame, and a drive unit for rotating the mounting plate. The mounting plate is provided with a mold, and the mold has a casting cavity and a casting port communicating with the casting cavity. The mold includes a fixed mold mounted on the mounting plate and a movable mold slidably mounted on the mounting plate. The side walls of the fixed mold and the movable mold are in close contact with each other. The mounting plate has a discharge port at the mold. It also includes a sand-shooting device for sand coating molding of iron molds and a conveying device for transferring the brake shoe body. The frame is equipped with a molding component for molding iron molds, a pretreatment component for anti-sticking and preheating treatment of iron molds, and a mold opening and closing component for cutting iron molds. The molding component includes a first protrusion on a movable iron mold, the outer peripheral wall of which is an arc shape corresponding to the inner peripheral wall of the wing plate. A first groove corresponding to the first protrusion is provided on a fixed iron mold, the inner peripheral wall of which corresponds to the outer peripheral wall of the wing plate. A second groove corresponding to the web plate and the support rib is provided on the outer peripheral wall of the first protrusion. A first sand core corresponding to the support hole and a second sand core corresponding to the fixing pin hole are movably installed in the iron mold. Multiple molding columns are slidably arranged in the fixed iron mold, and the multiple molding columns correspond one-to-one with multiple heat dissipation holes. One end of the molding column protrudes movably from the inner peripheral wall of the first groove and is movably attached to the outer peripheral wall of the first protrusion. The frame is provided with a synchronizing component for driving the molding columns to slide and a placement component for installing and cleaning the first sand core and the second sand core. When the fixed iron mold and the movable iron mold are fitted together, the first protrusion, the first sand core, the second sand core and the molding column form the casting cavity. The casting cavity with the sand coating layer is fitted with the outer surface of the brake shoe body, and the casting cavity is connected to the casting cavity.

2. The parting casting device for brake shoes according to claim 1, characterized in that: The synchronizing element includes multiple sliding plates slidably disposed within the fixed iron mold. The multiple sliding plates are evenly spaced along the inner peripheral wall of the first groove, and the sliding plates slide along the radial direction of the inner peripheral wall of the first groove. The side of the shaping column away from its protruding end is detachably connected to the sliding plate, and the multiple shaping columns are evenly distributed on the multiple sliding plates.

3. The parting casting device for brake shoes according to claim 2, characterized in that: The synchronizing component also includes a guide plate that is slidably disposed on the sliding plate. One end of the guide plate extends downward at an angle to the side away from the axis of the first protrusion. A guide groove corresponding to the guide plate is provided on the sliding plate, and the side wall of the guide plate is movably abutted against the inner side wall of the guide groove. A synchronizing frame is provided for lifting and lowering inside the fixed iron mold. Both ends of the multiple guide plates are connected to the synchronizing frame. A first power component for driving the synchronizing frame to lift and lower is provided on the mounting plate.

4. The parting casting device for brake shoes according to claim 3, characterized in that: The iron mold has mounting holes for installing the first and second sand cores. The placement assembly includes two plug rods that are lifted and mounted on the frame. The two plug rods correspond one-to-one with the two mounting holes and are movably inserted into the mounting holes. The frame is equipped with a receiving box, in which the pre-made first and second sand cores are movably placed. The outer peripheral walls of the first and second sand cores are movably fitted with the outer peripheral walls of the corresponding plug rods. The receiving box is inclined, and the lowest end of the bottom of the receiving box has a discharge hole corresponding to the two mounting holes. The plug rods movably block the discharge hole. The frame is equipped with a second power component that drives the plug rods to rise and fall.

5. The parting casting device for brake shoes according to claim 4, characterized in that: The feeding assembly includes a first push rod slidably disposed on the fixed iron mold, one end of the first push rod being movably fitted against the inner peripheral wall of the first groove, and the other end of the first push rod protruding from the side wall of the fixed iron mold. A second push rod is slidably disposed on the movable iron mold, one end of the second push rod being movably fitted against the outer peripheral wall of the first protrusion, and the other end of the second push rod protruding from the side wall of the movable iron mold. A third power component for driving the movable iron mold to slide is disposed on the mounting plate, and a pusher component for driving the first push rod and the second push rod to slide is disposed on the frame.

6. The parting casting device for brake shoes according to claim 5, characterized in that: The jacking component includes a first ring rail and a second ring rail mounted on the frame. Both the first and second ring rails are coaxially arranged with the mounting plate. The first ring rail has a first protrusion, and the second ring rail has a second and a third protrusion. The first and second protrusions correspond to each other, and the protrusion arc of the first, second, and third protrusions increases sequentially. The bottom of both the first and second ring rails has a sliding groove corresponding to their own shape. The ends of the first and second jacking rods that are far apart from each other are provided with sliding wheels. The sliding wheel on the first jacking rod is movably located in the sliding groove on the first ring rail, and the sliding wheel on the second jacking rod is movably located in the sliding groove on the second ring rail. The outer peripheral wall of the sliding wheel is movably pressed against the inner side wall of the sliding groove.

7. A parting casting device for brake shoes according to claim 6, characterized in that: The inner peripheral wall of the first groove is provided with multiple receiving holes corresponding to multiple shaping columns. The fixed iron mold is provided with a connecting hole that connects the multiple receiving holes, and the shaping columns can be used to block the connecting hole. The pretreatment component includes a three-way connector on the fixed iron mold and a liquid storage tank on the mounting plate. The liquid storage tank is used to store the release agent. One end of the three-way connector is connected to the connecting hole, and the other two ends of the three-way connector are respectively connected to an air pump and a liquid pump. The input end of the liquid pump is connected to the liquid storage tank. The frame is provided with a far-infrared heater, which is movable and corresponds to the iron mold.

8. A parting casting device for brake shoes according to claim 7, characterized in that: The iron mold is provided in multiple ways, and the multiple iron molds are evenly spaced along the circumference of the mounting plate. The driving component includes an internal gear ring coaxially mounted on the mounting plate and a drive gear rotatably mounted on the frame. The drive gear meshes with the internal gear ring. A fourth power component is provided on the frame to drive the drive gear to rotate.

9. A type of part-cast brake shoe, cast using a part-cast brake shoe part-casting apparatus as described in any one of claims 1-8, characterized in that: It includes a wing plate and two opposing web plates. The wing plate is semi-circular in shape. The web plates are connected to the inner peripheral wall of the wing plate. Multiple support ribs are provided at the connection between the web plates and the wing plates. The multiple support ribs are evenly spaced and parallel along the circumference of the wing plate. Multiple heat dissipation holes are evenly distributed on the outer peripheral wall of the wing plate. A support hole is opened at one end of the web plate, and an arc-shaped opening is opened at the other end of the web plate. A fixing pin hole for installing a spring is also opened on the web plate. The thickness of the web plate at the support hole, the arc-shaped opening, and the fixing pin hole is greater than the thickness of the rest of the web plate. A support frame is provided on the inner peripheral wall of the wing plate along the arc-shaped edge of the wing plate.

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