A sand-coated molding line for large castings

Abstract

The utility model relates to a kind of for large castings multiple large iron type's sand-coated molding line, it belongs to mechanical field.The utility model includes iron type and model heating furnace device, iron type and model mould drawing separation mechanism, iron type sand shooting sand-coated device, iron type and model grabbing moving mechanism, variable rail transition transfer trolley mechanism and multiple load moving platform car, iron type and model conveying rail line one from right to left respectively have iron type and model heating furnace device, iron type and model grabbing moving mechanism, iron type sand shooting sand-coated device and iron type and model mould drawing separation mechanism;Iron type and model conveying rail line two from left to right respectively have the moulding station of iron type and model and multiple load moving platform car;Two transition transfer trolley rails are respectively equipped with a variable rail transition transfer trolley mechanism;Iron type and model mould drawing separation mechanism, iron type sand shooting sand-coated device are all through type.The utility model structure is reasonable, sand-coated casting quality is good, degree of automation is high, easy to install, satisfy use demand.

Description

Technical Field

[0001] This utility model relates to a sand-coated molding line, and more particularly to a sand-coated molding line for multiple large iron molds used in large castings, which belongs to the field of machinery. Background Technology

[0002] Iron mold sand casting technology has advantages such as being green, high-quality, and energy-saving, and has been widely recognized. Due to its technical characteristics, it is mainly used in the casting production of large batches of small and medium-sized castings.

[0003] In recent years, with the rapid development of the equipment manufacturing industry, some large-scale equipment has placed higher demands on the quality of its castings. These castings (such as main shaft castings and planetary carrier castings in wind power systems) have low production requirements and are large castings (weighing over 10 tons and with maximum dimensions of 3-6 meters). The molds used for production often require multiple molds combined. Using traditional sand casting methods, it is difficult to meet the requirements for internal structure, performance, and precision in producing these castings. Castings have become a key bottleneck for the improvement of this type of equipment.

[0004] Due to its unique characteristics such as rapid cooling, extremely high mold rigidity, dense and smooth mold surface, and the feeding effect of graphitization expansion during cast iron solidification, iron mold sand casting is increasingly being used in the production of these castings. These castings often require multiple mold components, and the molds are large in size and weight. Existing single-station and double-station iron mold sand casting equipment, as well as the heating methods for the molds and iron molds, are insufficient to meet the molding requirements of these large iron mold sand castings.

[0005] Therefore, developing a sand-coated molding line capable of simultaneously producing multiple large iron molds is one of the key aspects of casting such parts. Utility Model Content

[0006] The purpose of this utility model is to overcome the above-mentioned deficiencies in the existing technology and to provide a sand-coating molding line for multiple large iron molds of large castings that has a safe and reasonable structural design, is stable and reliable, has good sand-coated mold quality, high degree of automation, and convenient equipment installation.

[0007] The technical solution adopted by this utility model to solve the above problems is as follows: This sand-coating molding line for multiple large iron molds of large castings is a closed-loop large iron mold sand-coating molding production line, including a mold closing station, two parallel iron mold and model conveying tracks (line 1 and line 2), and two transition transfer trolley tracks perpendicular to line 1 and line 2. Its features include: an iron mold and model heating furnace device, an iron mold and model separation mechanism, an iron mold sand-shooting and sand-coating device, an iron mold and model gripping and moving mechanism, and a track-changing transition transfer trolley mechanism. Along with multiple mobile trolleys, the first iron mold and model conveying track is equipped from right to left with an iron mold and model heating furnace, an iron mold and model gripping and moving mechanism, an iron mold sand shooting and covering device, and an iron mold and model separation mechanism; the second iron mold and model conveying track is equipped from left to right with an iron mold and model closing station and multiple mobile trolleys carrying the iron mold and model after closing; a track-changing transition transfer trolley mechanism is installed on each of the two transition transfer trolley tracks; the iron mold and model separation mechanism adopts a through-type separation method, and the iron mold sand shooting and covering device adopts a through-type sand shooting and covering molding method;

[0008] The track-changing transition transfer trolley mechanism includes a transition transfer trolley body, transition transfer wheels and transmission mechanism, and two transition transfer trolley tracks. The transition transfer wheels and transmission mechanism are provided on the lower part of the transition transfer trolley body. The transition transfer wheels and transmission mechanism are movably mounted on the two transition transfer trolley tracks. The transition transfer trolley body is provided with trolley tracks for carrying the moving trolley in and out.

[0009] Preferably, the mobile trolley of this utility model includes a trolley body, a positioning mechanism, trolley wheels and a transmission mechanism, guide wheels, an upper hook, a lower hook, a trolley track, and a track beam. The upper part of the trolley body is provided with multiple positioning mechanisms, and the lower part of the trolley body is provided with multiple trolley wheels, a transmission mechanism, and guide wheels. The guide wheels are movably mounted on the side plane of the trolley track. The trolley track is connected to the track beam. An upper hook is also provided under the trolley body, which cooperates with the lower hook. The mobile trolley is a self-propelled electric trolley.

[0010] Preferably, the model iron mold heating furnace device of this utility model includes a heating furnace body, a workpiece heating trolley for loading iron molds and models, a lifting heating furnace door, and a heating trolley track. The workpiece heating trolley is set on the heating trolley track, and the heating furnace body is set on one side of the workpiece heating trolley. The lifting heating furnace door is set at the entrance of the workpiece heating trolley of the heating furnace body.

[0011] Preferably, the mold-and-model separation mechanism of this utility model includes a mold-and-model separation base, a mold-and-model support, a mold-and-model separation column support beam, a clamping mechanism, two mold-and-model frames, two mold-and-model hydraulic cylinders, and two lifting guide rods. The mold-and-model support and the mold-and-model separation column are both installed on the mold-and-model separation base. The mold-and-model hydraulic cylinders and the clamping mechanism are both fixed on the mold-and-model support. The two mold-and-model frames are fixedly connected to the support beam. Each mold-and-model frame is installed together with the piston rods of the two mold-and-model hydraulic cylinders and the two lifting guide rods, and rises and falls with the rise and fall of the mold-and-model hydraulic cylinders. A trolley track is provided on the mold-and-model separation base for carrying the mobile trolley to and from the mold-and-model separation mechanism.

[0012] Preferably, the iron mold sand-shooting and sand-coating device of this utility model includes an upper beam, an air tank, a sand-coating and sand-shooting head, a lifting hydraulic cylinder, a sand-adding hopper, a base, a hydraulic station, multiple guide rods, multiple telescopic sand-adding pipes, and multiple columns. The upper beam is fixed on the multiple columns, and the multiple columns are all installed on the base. The sand-adding hopper is installed on the upper beam, and multiple telescopic sand-adding pipes are evenly distributed and fixed below the sand-adding hopper. The bottom of each telescopic sand-adding pipe is connected to the sand-coating and sand-shooting head below. The upper parts of the multiple guide rods are connected to the compressed air hoses of the air tank, and the lower parts of the multiple guide rods are installed on the flat surface of the sand-coating and sand-shooting head. The lifting hydraulic cylinder is fixed on the upper beam and is used for lifting and clamping the sand-coating and sand-shooting head. The hydraulic station is installed on the upper beam, and the base is equipped with a trolley track for the large iron mold and model to carry the mobile trolley in and out of the iron mold sand-shooting and sand-coating device.

[0013] Preferably, the iron-type sand-shooting and sand-coating device of this utility model also includes a safety fence, which is installed on the upper beam; thereby achieving the purpose of eliminating safety hazards.

[0014] Preferably, the upper beam, column, and base of this invention are connected together to form a rigid frame structure, making the whole structure more stable and robust.

[0015] Preferably, the iron mold and model grasping and moving mechanism of this utility model includes a gantry rail frame, a moving frame, a grasping and moving lifting cylinder, a grasping and moving upper beam, a grasping and moving lower beam, a model iron mold lifting hook, multiple grasping and moving columns, and multiple grasping and moving guide rods. The grasping and moving lifting cylinder is installed on the moving frame, and the piston rod in the grasping and moving lifting cylinder is connected to the grasping and moving lower beam. The upper part of the multiple grasping and moving guide rods is connected to the grasping and moving upper beam, and the lower part of the multiple grasping and moving guide rods passes through the moving frame and connects to the grasping and moving lower beam. A model iron mold lifting hook is provided below the grasping and moving lower beam. The moving frame is movably mounted on the gantry rail frame, and the gantry rail frame is fixed on the multiple grasping and moving columns.

[0016] Compared with the prior art, this utility model has the following advantages and effects: (1) The overall structure design is safe and reasonable, stable and reliable. The sand-coating molding line of this utility model can complete the sand-shooting and sand-coating molding of multiple large iron molds of different shapes and sizes in the casting mold of large castings; (2) The sand-shooting and sand-coating device of the iron mold adopts the through-type sand-shooting and sand-coating molding method, which can sequentially perform sand-shooting and sand-coating molding operations on the iron mold models with molds closed on each carrier trolley; The mold and model separation mechanism adopts the through-type mold separation method, which can sequentially perform mold separation operations on the iron mold models after sand-shooting and sand-coating molding on each carrier trolley; (3) Using the molding line of this utility model to perform sand-coating molding of multiple large iron molds, the process flow is smooth, the labor intensity of the iron mold sand-coating molding process is low, the degree of mechanization is high, and the quality of large iron mold sand-coating casting is good; (4) The investment cost of the large iron mold sand-coating molding line is low, the equipment is easy to install, and the maintenance cost is low; (5) This production line adopts the distributed control system method, which can realize the automated and intelligent batch production of large castings with iron mold sand-coating casting, and meet the existing usage needs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the sand-coated molding line arrangement of multiple large iron molds in an embodiment of this utility model.

[0018] Figure 2 This is a schematic diagram of the main structure of the iron mold and model heating furnace device in an embodiment of this utility model.

[0019] Figure 3 This is a top view of the iron mold and model heating furnace device in an embodiment of this utility model.

[0020] Figure 4 This is a schematic diagram of the main structure of the iron-type sand-shooting and sand-coating device in this embodiment of the present invention.

[0021] Figure 5 This is a side view of the iron-type sand-shooting and sand-coating device in an embodiment of this utility model.

[0022] Figure 6 This is a top view of the iron-type sand-shooting and sand-coating device in an embodiment of this utility model.

[0023] Figure 7 This is a three-dimensional structural schematic diagram of the iron-type sand-shooting and sand-coating device in an embodiment of this utility model.

[0024] Figure 8 This is a front view structural schematic diagram of the iron mold and model separation mechanism in an embodiment of this utility model.

[0025] Figure 9 This is a side view of the iron mold and model separation mechanism in an embodiment of this utility model.

[0026] Figure 10 This is a top view of the iron mold and model separation mechanism in an embodiment of this utility model.

[0027] Figure 11 This is a three-dimensional structural diagram of the iron mold and model separation mechanism in an embodiment of this utility model.

[0028] Figure 12 This is a front view structural schematic diagram of the iron mold and model grasping and moving mechanism in this embodiment of the utility model.

[0029] Figure 13 This is a front view structural schematic diagram of the track-changing transition transfer trolley mechanism in an embodiment of this utility model.

[0030] Figure 14 This is a side view of the track-changing transition transfer trolley mechanism in an embodiment of this utility model.

[0031] Figure 15 This is a top view of the track-changing transition transfer trolley mechanism in an embodiment of this utility model.

[0032] Figure 16 This is a three-dimensional structural schematic diagram of the track-changing transition transfer trolley mechanism in an embodiment of this utility model.

[0033] Figure 17 This is a schematic diagram of the main structure of the mobile trolley in this embodiment of the present invention.

[0034] Figure 18 This is a side view of the structure of the mobile trolley in an embodiment of this utility model.

[0035] Figure 19 This is a top view of the structure of the mobile trolley in this embodiment of the present invention.

[0036] Figure 20 This is a three-dimensional structural diagram of the mobile trolley in an embodiment of this utility model.

[0037] Figure 21 This is a schematic diagram of the sand-coating molding line process for multiple large iron molds in an embodiment of this utility model.

[0038] Figure 22 This is a schematic diagram of the initial state of the sand-coating production line during the sand-coating production process of a sand-coating molding line for multiple large iron molds, according to an embodiment of this utility model.

[0039] Figure 23 This is a schematic diagram showing the gripper of the iron mold and model moving trolley entering the heating molding and demolding track line during the heating process of the iron mold and model in this embodiment of the utility model, with the gripper descending to its lowest position.

[0040] Figure 24This is a schematic diagram of the gripping device placing the iron mold and model onto the workpiece trolley of the heating furnace during the heating process of the iron mold and model according to an embodiment of this utility model.

[0041] Figure 25 This is a schematic diagram illustrating how the heating furnace trolley sends the iron mold and model into the heating furnace for heating during the heating process of the iron mold and model in this embodiment of the utility model.

[0042] Figure 26 This is a schematic diagram showing the heating trolley moving out during the heating process of the iron mold and model in this embodiment of the utility model, delivering the heated iron mold and model to the gripping device.

[0043] Figure 27 This is a schematic diagram of the gripping device placing the iron mold and model onto the supporting mobile trolley during the heating process of the iron mold and model in this embodiment of the utility model.

[0044] Figure 28 This is a schematic diagram of the iron mold and model moving out of the transition rotating trolley during the heating process of the iron mold and model in this embodiment of the utility model.

[0045] Figure 29 This is a schematic diagram of the moving trolley carrying the iron mold and model entering the sand-shooting and sand-coating molding device during the sand-shooting and sand-coating molding process of the iron mold in this embodiment of the utility model.

[0046] Figure 30 This is a schematic diagram showing the sand-shooting head descending and the iron mold, model, and trolley clamping together during the sand-shooting and sand-coating process of the iron mold in this embodiment of the utility model.

[0047] Figure 31 This is a schematic diagram showing the sand-shooting head rising to the top and completely releasing the clamping from the iron mold after the sand-shooting and sand-coating process is completed in the embodiment of this utility model.

[0048] Figure 32 This is a schematic diagram of the iron mold / model and the supporting mobile trolley moving out of the sand-shooting and sand-coating device during the sand-shooting and sand-coating process of the iron mold in this embodiment of the utility model.

[0049] Figure 33 This is a schematic diagram showing the clamping device retracting from the clamping frame and descending to a lower position during the mold-and-model separation operation in the mold-and-model separation station of this utility model embodiment, where the mold and model enter the mold-and-model separation station.

[0050] Figure 34 This is a schematic diagram showing the clamping device extending to clamp and fix the model and the supporting moving trolley during the mold separation operation of the mold and model in the mold separation station of this utility model embodiment.

[0051] Figure 35This is a schematic diagram of the mold-lifting frame rising to the top and separating the mold and model during the mold-lifting separation operation in the mold-lifting station of this utility model embodiment.

[0052] Figure 36 This is a schematic diagram showing the crane lifting the iron mold away from the clamping device and exiting the clamping state during the iron mold and model separation operation at the iron mold and model lifting station in an embodiment of this utility model.

[0053] Figure 37 This is a schematic diagram of the process in which the mold-lifting frame descends to the low-position model and the carrying trolley moves out during the mold-lifting separation operation of the mold and model in the mold-lifting station of this utility model embodiment.

[0054] Figure 38 This is a schematic diagram of the mold-lifting frame descending to a low position during the mold-closing operation of the iron mold and the model in this embodiment of the utility model. Figure 1 .

[0055] Figure 39 This is a schematic diagram of the mold-lifting frame descending to a low position during the mold-closing operation of the iron mold and the model in this embodiment of the utility model. Figure 2 .

[0056] Figure 40 This is a schematic diagram of a large spindle casting. Figure 1 .

[0057] Figure 41 This is a schematic diagram of a large spindle casting. Figure 2 .

[0058] Figure 42 This is a schematic diagram of multiple iron molds assembled to form a large wind turbine main shaft.

[0059] In the diagram: Mold closing station H, mold lifting and separation station F, sand shooting and sand coating station S, heating station J, iron mold and model conveying track line 1 T1, iron mold and model conveying track line 2 T2, carrying mobile trolley 1, iron mold and model heating furnace device 2, iron mold and model mold lifting and separation mechanism 3, iron mold sand shooting and sand coating device 4, iron mold and model gripping and moving mechanism 5, track changing transition transfer trolley mechanism 6;

[0060] Carrying mobile trolley 1: trolley body 11, positioning mechanism 12, trolley wheels and transmission mechanism 13, guide wheel 14, upper hook 15, lower hook 16, trolley track 17, track beam 18;

[0061] Iron mold and model heating furnace device 2: heating furnace body 21, workpiece heating trolley 22, lifting heating furnace door 23, heating trolley track 24;

[0062] Iron mold and model separation mechanism 3: mold separation base 31, mold separation support 32, mold separation column 33, mold separation frame 34, support beam 35, mold separation hydraulic cylinder 36, lifting guide rod 37, clamping mechanism 38, guide sleeve 39;

[0063] Iron-type sand-shooting and sand-coating device 4: upper beam 4-1, air bag 4-2, sand-coating and sand-shooting head 4-3, lifting hydraulic cylinder 4-4, guide rod 4-5, telescopic sand-adding pipe 4-6, sand-adding hopper 4-7, column 4-8, base 4-9, hydraulic station 4-10, safety fence 4-11;

[0064] Iron mold and model grabbing and moving mechanism 5: gantry rail frame 51, grabbing and moving column 52, moving frame 53, grabbing and moving lifting cylinder 54, grabbing and moving upper beam 55, grabbing and moving lower beam 56, grabbing and moving guide rod 57, model iron mold lifting hook 58;

[0065] Track-changing transition transfer trolley mechanism 6: transition transfer trolley body 61, transition transfer wheels and transmission mechanism 62, transition transfer trolley track 63;

[0066] Heating-shaping-molding-carrying mobile trolley rail conveyor line X1, mold closing-carrying mobile trolley rail conveyor line X2, running start position X3. Detailed Implementation

[0067] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0068] Example.

[0069] See Figures 1 to 42 This embodiment is used for a sand-coating molding line for multiple large iron molds of large castings. It is a closed-loop large iron mold sand-coating molding production line, which is equipped with a mold closing station H, a mold opening and separation station F, a sand shooting and sand coating station S, and a heating station J. The molding line includes two parallel iron mold and model conveying tracks T1 and T2, as well as two transition transfer trolley tracks 63 perpendicular to the iron mold and model conveying tracks T1 and T2, an iron mold and model heating furnace device 2, an iron mold and model mold opening and separation mechanism 3, an iron mold sand shooting and sand coating device 4, an iron mold and model gripping and moving mechanism 5, a track changing transition transfer trolley mechanism 6, and multiple carrying moving trolleys 1.

[0070] Figure 1The diagram shows the arrangement of a sand-coated molding line for casting large iron molds. As can be seen from the diagram, this utility model's large iron mold sand-coated molding line is a closed-loop production line. It consists of two parallel iron mold and model conveying tracks, T1 and T2, and two perpendicular transition transfer trolley tracks 63 at both ends of the tracks, forming a closed-loop running line for moving multiple iron molds and models. From left to right, the upper track in the diagram has mold-closing stations for iron molds and models, as well as multiple carrying trolleys that carry the molds and models after they are closed. On the vertical tracks at both ends, there is a transition trolley for transporting the carrying trolley 1 between the upper and lower tracks. In the figure: the lower iron mold and model conveying track line T1 is equipped with iron mold and model heating furnace device 2, iron mold and model grabbing and moving mechanism 5, iron mold sand shooting and covering device 4 and iron mold and model mold lifting and separation mechanism 3 from right to left; the upper iron mold and model conveying track line T2 is equipped with iron mold and model closing station H and multiple carrying moving trolleys 1 that carry the iron mold and model after closing from left to right.

[0071] Figures 2-3 The device 2 is a trolley-type electric heating furnace for iron molds and models. It consists of a furnace body 21, a workpiece heating trolley 22 for loading iron molds and models, a lifting furnace door 23, and a heating trolley track 24. The workpiece heating trolley 22 is mounted on the heating trolley track 24, and the furnace body 21 is located on one side of the workpiece heating trolley 22. The lifting furnace door 23 is located at the entrance of the workpiece heating trolley 22 in the furnace body 21. Through the heating furnace electrical control system, the iron molds and models placed on the workpiece heating trolley 22 and assembled can be sent into the trolley-type furnace body 21 to automatically complete the heating operation of large iron molds and models. The heating process parameters of each different iron mold model can be personalized and adjusted according to the weight, initial temperature, and complexity of each iron mold model with different shapes through the integrated control system.

[0072] Figures 4-7 The iron mold sand-shooting and sand-coating device 4 is a through-type sand-shooting and sand-coating molding device in this molding production line. That is, multiple carrier mobile trolleys 1 carrying iron molds after molding enter this station in sequence, and then the iron molds entering this station are subjected to sand-shooting and sand-coating molding operations.

[0073] This embodiment of the iron-type sand-shooting and sand-coating device 4 includes an upper beam 4-1, an air tank 4-2, a sand-coating and sand-shooting head 4-3, a lifting hydraulic cylinder 4-4, a guide rod 4-5, a telescopic sand-adding pipe 4-6, a sand-adding hopper 4-7, a column 4-8, a base 4-9, a hydraulic station 4-10, a safety fence 4-11, and a trolley track 17, etc. The upper beam 4-1 is a welded steel structure platform that houses and supports all the sand-coating and sand-shooting molding device components of this utility model. The upper beam 4-1 is fixed on four columns 4-8, and the four columns 4-8 are installed on the base 4-9. The upper beam 4-1, columns 4-8, and base 4-9 are fixedly connected together to form a rigid frame structure.

[0074] In this embodiment, a sand-filling hopper 4-7 for holding the coating sand used in sand-casting is installed on the upper beam 4-1. Multiple telescopic sand-filling pipes 4-6 are evenly distributed and fixed below the sand-filling hopper 4-7. The bottom of each telescopic sand-filling pipe 4-6 is connected to the sand-casting head 4-3 below, which is used to evenly transport the coating sand in the sand-filling hopper into the injection chamber.

[0075] In this embodiment, multiple guide rods are hollow guide rods. The upper part of multiple guide rods 4-5 is connected to the compressed air ventilation hose of the air tank 4-2, and the lower part of multiple guide rods 4-5 is installed on the upper plane of the sand-coating injection head 4-3. The guide rods 4-5 are used to guide the sand-coating injection head 4-3 when it rises or falls. At the same time, they are used to introduce compressed air from the air tank 4-2 through the hollow guide rods 4-5 into the cavity of the sand-coating injection head 4-3 for sand-coating molding when the iron mold is sand-coated.

[0076] In this embodiment, the hydraulic station 4-10 is installed on the upper beam 4-1, and the lifting hydraulic cylinder 4-4 is fixed on the upper beam 4-1 for lifting and clamping the sand-shooting head 4-3.

[0077] In this embodiment, a trolley track 17 is installed on the base 4-9 for the large iron mold and model to carry the moving trolley 1 to and from the iron mold sand-shooting and sand-coating device 4; the sand-shooting and sand-coating process parameters of this sand-shooting and sand-coating device can be customized and adjusted according to the production process requirements of each iron mold of different shapes through the integrated control system of this device.

[0078] Figures 8-11The iron mold and model separation mechanism 3 adopts a through-type mold separation method. The carrying trolley 1, which carries the iron mold model after sand spraying, sand covering and solidification, enters this station. Then, the iron mold and model entering this station are separated. After the iron mold and model are completely separated, the carrying trolley 1 carrying the model automatically drives away from this station along the running route of this production line. The iron mold is lifted away from this mold separation station by a crane to each iron mold stacking and casting section for the stacking operation between the iron molds. Subsequently, the overall mold after stacking can be used for pouring, solidification, cooling, opening and casting.

[0079] In this embodiment, the mold-and-model separation mechanism 3 includes a mold-and-model separation base 31, a mold-and-model support 32, a mold-and-model separation column 33, a mold-and-model frame 34, a support beam 35, a mold-and-model hydraulic cylinder 36, a lifting guide rod 37, a clamping mechanism 38, a guide sleeve 39, and a trolley track 17. The mold-and-model separation base 31 is a steel frame structure used to support all the components of this device. The mold-and-model support 32 and the mold-and-model separation column 33 are installed on both sides of the mold-and-model separation base 31, forming an integral frame structure with the mold-and-model separation base 31. The mold-and-model hydraulic cylinder 36, the clamping mechanism 38, etc. are fixed on the mold-and-model support 32, used for the rising and demolding of the mold when the mold and model are separated, and at the same time preventing the mold from clamping the model plate when the mold rises and demolding, and preventing the model from rising with the mold.

[0080] In this embodiment, two mold-lifting frames 34 are fixed together with the support beam 35 to form an integral frame for the separation and mold-lifting operation between the iron mold and the model. Each mold-lifting frame 34 is installed together with the piston rods of two mold-lifting hydraulic cylinders 36 and two lifting guide rods 37, and rises and falls with the rise and fall of the mold-lifting hydraulic cylinders 36 for the separation and mold-lifting operation between the iron mold and the model.

[0081] In this embodiment, a trolley track 17 is provided on the mold separation base 31 to carry the mobile trolley 1 in and out of the mold separation mechanism 3.

[0082] In this embodiment, the lifting guide rod 37 is provided with a guide sleeve 39 that cooperates with it. The various iron mold casting and mold setting process parameters of the iron mold and model separation mechanism 3 are controlled and adjusted in a personalized manner by the integrated control system according to the production process requirements of each iron mold of different shapes.

[0083] Figure 12A mold and model grasping and moving mechanism 5 is provided in the mold sand-coated molding line for casting large castings. The mold and model grasping and moving mechanism 5 includes a gantry rail frame 51, a moving carriage 53, a grasping and moving lifting cylinder 54, a grasping and moving upper beam 55, a grasping and moving lower beam 56, a mold lifting hook 58, multiple grasping and moving columns 52, and multiple grasping and moving guide rods 57. The grasping and moving lifting cylinder 54 is mounted on the moving carriage 53. The piston rod in the grasping and moving lifting cylinder 54 is connected to the grasping and moving lower beam 56. The upper part of the multiple grasping and moving guide rods 57 is connected to the grasping and moving upper beam 55. The lower part of the multiple grasping and moving guide rods 57 passes through the moving carriage 53 and connects to the grasping and moving lower beam 56. The mold lifting hook 58 is provided below the grasping and moving lower beam 56. The moving carriage 53 is movably mounted on the gantry rail frame 51, and the gantry rail frame 51 is fixed on the multiple grasping and moving columns 52.

[0084] In this embodiment, the iron mold and model grasping and moving mechanism 5 is used to grasp the assembled iron mold and model from the carrying moving trolley 1 and onto the workpiece heating trolley 22 of the iron mold and model heating furnace device 2, or to grasp the heated model iron mold from the workpiece heating trolley 22 of the iron mold and model heating furnace device 2 and place it onto the unloaded carrying moving trolley 1.

[0085] Figures 13-16 The track-changing transition transfer trolley mechanism 6 is a self-propelled electric trolley used to change the track of the carrying mobile trolley 1, which carries the model or iron mold, from one side track to the other side track of the closed-loop iron mold sand coating molding production line.

[0086] In this embodiment, the track-changing transition transfer trolley mechanism 6 includes a transition transfer trolley body 61, transition transfer wheels and transmission mechanism 62, and two transition transfer trolley tracks 63. The lower part of the transition transfer trolley body 61 is provided with transition transfer wheels and transmission mechanism 62, which are movably mounted on the two transition transfer trolley tracks 63. The transition transfer trolley body 61 is provided with a trolley track 17 for carrying the mobile trolley 1 in and out.

[0087] Figures 17-20The mobile trolley 1 is a self-propelled electric trolley used to carry the model or the assembled iron mold and model, and to move and transport the model or iron mold and model to various work stations of this molding production line. The mobile trolley 1 includes a trolley body 11, positioning mechanism 12, trolley wheels and transmission mechanism 13, guide wheel 14, upper hook 15, lower hook 16, trolley track 17 and track beam 18, etc. The upper part of the trolley body 11 is provided with multiple positioning mechanisms 12, and the lower part of the trolley body 11 is provided with multiple trolley wheels and transmission mechanism 13 and guide wheel 14. The guide wheel 14 is movably set on the side plane of the trolley track 17. The trolley track 17 is connected to the track beam 18. An upper hook 15 is also provided under the trolley body 11, and the upper hook 15 cooperates with the lower hook 16.

[0088] This embodiment describes the sand-coating process of multiple iron molds of different shapes and sizes in a multi-mold sand-coating molding line for casting large castings. Figures 22-39 All the multiple iron molds and models that need to be sand-coated are placed one by one on the multiple iron mold and model carrying trolleys 1 in the sand-coating production line of this utility model. First ( Figures 22-39The upper track line, namely "Iron Mold and Model Conveying Track Line 2 T2" (Mold Closing - Carrying Moving Trolley Track Conveying Line X2), at the right end (the starting position of the molding operation of this molding production line X3), carries the iron mold and model carrying moving trolley 1. The transition transfer trolley mechanism 6 moves vertically downward to the lower track line: namely "Iron Mold and Model Conveying Track Line 1 T1" (Heating - Molding - Demolding - Carrying Moving Trolley Track Conveying Line X1), and stops at the rightmost position. The iron mold lifting hook 58 of the iron mold and model grasping moving mechanism 5, which is above the workpiece heating trolley 22, descends to the bottom. Then, the grasping moving trolley 1 moves from right to left from the position above the workpiece heating trolley 22 into place (moving to the right side of the transition transfer trolley mechanism 6 of this utility model). The iron mold lifting hook 58 of the iron mold and model grasping moving mechanism 5 rises to lift the iron mold and model on the carrying moving trolley 1 away from the trolley body 11, so that the bottom surface of the model is higher than the workpiece heating trolley 22. The workpiece heating trolley 22 is positioned on the plane, and then the grabbing trolley moves to the right above the workpiece heating trolley 22. The model iron pattern lifting hook 58 descends and places the iron pattern and model onto the worktable of the workpiece heating trolley 22. The workpiece heating trolley 22 enters the furnace body 21, and the lifting furnace door 23 descends and closes. The model iron pattern heating furnace device 2 heats the iron pattern and model. After the iron pattern and model are heated to the temperature required for sand spraying and sand coating, the lifting furnace door 23 is opened, and the workpiece heating trolley 22 sends out the iron pattern and model. The model iron pattern lifting hook 58 in the iron pattern and model grabbing and moving mechanism 5 grabs the iron pattern and model and sends it above the track-changing transition transfer trolley mechanism 6. Then, the iron pattern and model are placed on the carrying moving trolley 1. After the carrying moving trolley 1 carrying the heated iron pattern and model automatically and completely leaves the track-changing transition transfer trolley mechanism 6, the track-changing transition transfer trolley mechanism 6 returns empty to (…). Figures 22-39The upper track line, namely the "Iron Mold and Model Conveying Track Line 2 T2" working position, prepares for the next moving trolley 1 carrying the iron mold and model to enter; the moving trolley 1 carrying the heated iron mold and model moves along the heating-molding-molding-moving trolley conveyor line X1 into the sand-shooting and sand-coating molding station of the through-type iron mold sand-shooting and sand-coating device 4 and stops. The sand-coating sand-shooting head 4-3 in the iron mold sand-shooting and sand-coating device 4 lowers, clamping the sand-shooting plate, iron mold, and model together, and then performs the sand-shooting and sand-coating operation, covering the iron mold with a layer of coating sand to form an iron mold sand-coated casting mold. The sand-coating sand-shooting head 4-3 is raised, releasing the clamping between the sand-shooting plate, iron mold, and model. In the first stage, the carrying trolley 1, which carries the iron mold and model, automatically drives out of the through-type iron mold sand-shooting and sand-coating device 4; the carrying trolley 1, which carries the iron mold and model, automatically drives into the through-type iron mold and model separation mechanism 3. When the carrying trolley 1 drives into the iron mold and model separation mechanism 3, the clamping mechanism 38 in the iron mold and model separation mechanism 3 is in the disengaged and released state, and the mold-lifting frame 34 is in the lowest position. After the sand coating layer in the iron mold has solidified, the clamping mechanism 38 extends and clamps the model and the carrying trolley 1 onto the iron mold and model separation mechanism 3. The two mold-lifting frames 34 arranged on both sides of the iron mold and model separation mechanism 3 are activated by the mold-lifting hydraulic cylinder 36. The mold rises upwards, and when the upper plane of the mold-lifting frame 34 touches the lower plane of the mold's running edge, it pulls the mold upwards together. Under the action of the lifting force of the mold-lifting hydraulic cylinder 36, the molded iron mold is separated from the model. Then, a crane is used to lift the separated iron mold from the mold-and-model mold-lifting separation mechanism 3, and the iron mold can be sent to the mold box assembly and pouring station. The clamping mechanism 38 in the mold-and-model mold-lifting separation mechanism 3 retracts outwards, thereby releasing the clamping state between the model and the carrying mobile trolley 1 and the mold-and-model mold-lifting separation mechanism 3. The carrying mobile trolley 1 carrying the model can then automatically drive out of the mold-and-model mold-lifting separation mechanism 3, thus completing one The next step involves the separation of the iron mold and the model. The carrier trolley 1 carrying the model automatically enters the track-changing transition transfer trolley mechanism 6. The track-changing transition transfer trolley mechanism 6 automatically leaves the heating-molding-molding-carrying carrier trolley track conveyor line X1 of this molding production line, moves the carrier trolley 1 carrying the model to the corresponding position on another carrier trolley conveyor track of this production line, and then stops. The carrier trolley 1 carrying the model then leaves the track-changing transition transfer trolley mechanism 6 and automatically enters another carrier trolley 1 track conveyor line of this molding production line (the track conveyor line for mold closing-carrying carrier trolley movement), entering the mold closing station position of the iron mold and the model.At the mold and model assembly station, a crane lifts the cleaned mold to the top of the station, and then the mold and model are assembled using the crane. After assembly, the carrying trolley 1, which holds the mold and model, automatically moves forward sequentially along the conveyor track until it automatically enters the track-changing transfer trolley mechanism 6 at the other end of the conveyor line (the starting position X3 of the molding operation on this molding production line). This completes one full sand-coating molding process for a mold of a certain shape and size on this molding production line. The carrying trolleys 1, each holding the mold and model, are moved sequentially and cyclically on this molding production line to complete the sand-coating molding operation for different molds on multiple carrying trolleys 1. Except for the lifting of the molded mold from the molding production line and the mold and model assembly, which require manual intervention, the parameter settings, operation control, and digital management of other stations and processes are automated and intelligently produced using a computer distributed control system and production management system, enabling the production of multiple molds of different shapes. ;

[0089] In the production of large wind turbine castings using iron mold sand casting, multiple large iron molds are often required to form the mold needed for the large casting. Usually, several large iron molds are needed, such as the outer circle contour mold for wind turbine main shaft casting. Figures 40-41 The system uses multiple iron molds of different shapes and sizes (generally 5 molds along the length of the main wind turbine shaft, of which multiple are straight-through outer diameter molds for the wind turbine shaft, and 1 is a through-type mold for the connecting flange). See [link / reference]. Figure 42 By covering each iron mold cavity surface with a layer of coated sand, curing and demolding, and then stacking the corresponding iron molds for the outer circular cavity of the wind turbine main shaft together, a complete iron mold for the outer circular cavity of the wind turbine main shaft is formed. For example, the iron mold for the outer circular cavity of the wind turbine main shaft uses multiple iron molds of different shapes and sizes (generally 5 along the length of the main wind turbine main shaft axis, of which multiple are straight-through wind turbine main shaft outer circular molds, and 1 is a through-type mold for connecting flanges). See [link / reference needed]. Figure 42 Each piece of the outer circular cavity iron mold covered with sand is stacked together to form a complete outer circular cavity iron mold covered with sand for the wind turbine main shaft.

[0090] The large iron mold of this utility model still adopts the sand injection and sand coating molding method. The molding sand of the sand coating layer still adopts thermosetting phenolic resin sand. That is, under the action of compressed air, the coated sand is injected into the gap between the model and the iron mold to form a sand coating layer. Under the action of heat, the sand coating layer is completely cured, the mold is removed, and finally a layer of coated sand is formed on the iron mold cavity to form an iron mold sand coating casting.

[0091] The production process of this utility model's iron mold sand-coated casting molding line is as follows: Figure 21As shown, it includes the following processes: sand coating molding of iron molds, solidification and separation of iron molds and models, conveying and transferring models, mold closing of iron molds and models, conveying and transferring iron molds and models, and heating of iron molds and models. It forms a closed loop of various iron mold sand coating casting production lines, which are used to complete the heating, sand spraying, solidification, and demolding of multiple large iron molds and models in the iron mold sand coating casting process.

[0092] The present invention relates to a sand-coated casting production line for iron molds, which combines a sand-coated molding device, a mold separation device, a heating device, and a corresponding moving conveyor device to form a sand-coated molding production line capable of producing multiple different iron molds. Figure 1 ),from Figure 1 As can be seen, this molding line forms a closed-loop, cyclical production line for completing multiple iron molds of different shapes. The iron molds that have completed sand molding, as well as the iron molds that need to be sand molded, are all lifted off or into this sand molding production line by overhead cranes.

[0093] Large cast iron castings typically weigh between 10 and 30 tons. Their dimensions include a length of 4-6 meters, a width of 2-4 meters, and a height of 3-5 meters. The materials used include ductile iron and gray cast iron. For example, wind turbine main shaft castings typically have a length of 4-6 meters, a connecting flange diameter of 2.8-3.5 meters, and a main shaft journal outer diameter of 1.5-2.0 meters, classifying them as large ductile iron castings. When these castings are produced using iron mold sand casting, the mold often requires 4-5 iron mold pieces combined to form a complete mold due to the product's structure and dimensions (see...). Figure 42 The height of each iron mold in the integral sand-coated casting of the wind turbine main shaft is generally controlled at about 1 meter, depending on the size of the wind turbine product. The largest projected diameter of the iron mold for the wind turbine main shaft is about 5-6 meters, and the weight of the largest connecting flange iron mold generally exceeds 30 tons.

[0094] There are several problems with sand coating of multiple large iron molds: (1) How to complete the sand coating of multiple different iron molds on one sand spraying and sand coating device; (2) How to heat up multiple large iron molds and models; (3) How to demold and remove multiple large iron molds and models; (4) How to move and run multiple iron molds and models between different workstations during the sand coating process.

[0095] This embodiment of the multi-large iron mold sand-coating molding line breaks down all the processes in a conventional iron mold sand-coating molding device into multiple workstations. Then, several iron mold and model moving mechanisms connect these workstations together, namely: setting up iron mold and model heating workstations, iron mold sand-coating molding workstations, iron mold and model separation workstations, and iron mold and model assembly workstations. Corresponding moving conveyor devices are configured at these workstations. At the same time, iron mold and model moving conveyor trolleys with the number of models required for the large casting (the number of models required for one casting product) and molding line transition track changing trolleys are configured to form a closed-loop linkage moving operation mode. The process of multi-large iron mold sand-shooting and sand-coating molding is carried out in sequence, including iron mold and model assembly, heating (model and iron mold), sand-shooting and sand coating, solidification, iron mold and model demolding and separation, and model moving and transfer, thereby completing the sand-coating molding production of multiple large iron molds required in the production of large casting iron mold sand-coating casting.

[0096] Based on the above description, those skilled in the art are already able to implement it.

[0097] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their parts and components. The above description is merely illustrative of the structure of this utility model. All equivalent or simple variations made based on the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, all of which should fall within the protection scope of this utility model.

Claims

1. A sand-coating molding line for multiple large iron molds used in large castings, which is a closed-loop large iron mold sand-coating molding production line, comprising a mold closing station (H), two parallel iron mold and model conveying track lines one (T1) and two iron mold and model conveying track lines two (T2), and two transition transfer trolley tracks (63) perpendicular to the iron mold and model conveying track lines one (T1) and two iron mold and model conveying track lines two (T2) at both ends, characterized in that: It also includes a mold and model heating furnace device (2), a mold and model separation mechanism (3), a mold sand shooting and coating device (4), a mold and model grabbing and moving mechanism (5), a track-changing transition transfer trolley mechanism (6), and multiple carrying mobile trolleys (1). The mold and model conveying track line one (T1) is equipped with the mold and model heating furnace device (2), the mold and model grabbing and moving mechanism (5), the mold sand shooting and coating device (4), and the mold and model separation mechanism (3) from right to left. The mold and model conveying track line two (T2) is equipped with the mold closing station (H) of the mold and model and multiple carrying mobile trolleys (1) carrying the mold and model after mold closing from left to right. The two transition transfer trolley tracks (63) A transition transfer trolley mechanism (6) is set on each of the ); the iron mold and model separation mechanism (3) adopts a through-type separation method, and the iron mold sand shooting and sand covering device (4) adopts a through-type sand shooting and sand covering method; the transition transfer trolley mechanism (6) includes a transition transfer trolley body (61), transition transfer wheels and transmission mechanism (62) and two transition transfer trolley tracks (63). The lower part of the transition transfer trolley body (61) is provided with transition transfer wheels and transmission mechanism (62), which are movably set on the two transition transfer trolley tracks (63). The transition transfer trolley body (61) is provided with a trolley track (17) for carrying the mobile trolley (1) in and out.

2. The sand-coated molding line for multiple large iron molds used in large castings according to claim 1, characterized in that: The mobile trolley (1) includes a trolley body (11), a positioning mechanism (12), trolley wheels and a transmission mechanism (13), guide wheels (14), an upper hook (15), a lower hook (16), a trolley track (17), and a track beam (18). The upper part of the trolley body (11) is provided with multiple positioning mechanisms (12), and the lower part of the trolley body (11) is provided with multiple trolley wheels and a transmission mechanism (13) and guide wheels (14). The guide wheels (14) are movably arranged on the side plane of the trolley track (17). The trolley track (17) is connected to the track beam (18). An upper hook (15) is also provided below the trolley body (11). The upper hook (15) and the lower hook (16) cooperate with each other. The mobile trolley (1) is a self-propelled electric trolley.

3. The sand-coated molding line for multiple large iron molds used in large castings according to claim 1, characterized in that: The model iron mold heating furnace device (2) includes a heating furnace body (21), a workpiece heating trolley (22) for loading iron molds and models, a lifting heating furnace door (23), and a heating trolley track (24). The workpiece heating trolley (22) is set on the heating trolley track (24), and the heating furnace body (21) is set on one side of the workpiece heating trolley (22). The lifting heating furnace door (23) is set at the entrance of the workpiece heating trolley (22) of the heating furnace body (21).

4. The sand-coated molding line for multiple large iron molds used in large castings according to claim 1, characterized in that: The mold-and-model separation mechanism (3) includes a mold-and-model separation base (31), a mold-and-model support (32), a mold-and-model separation column (33), a support beam (35), a clamping mechanism (38), two mold-and-model frames (34), two mold-and-model hydraulic cylinders (36), and two lifting guide rods (37). The mold-and-model support (32) and the mold-and-model separation column (33) are both mounted on the mold-and-model separation base (31). The mold-and-model hydraulic cylinders (36) and the clamping mechanism (38) are also mounted on the mold-and-model separation base (31). 38) All are fixed on the mold-lifting support (32). The two mold-lifting frames (34) are fixedly connected to the support beam (35). Each mold-lifting frame (34) is installed together with the piston rod of the two mold-lifting hydraulic cylinders (36) and the two lifting guide rods (37) and rises and falls with the rise and fall of the mold-lifting hydraulic cylinders (36). The mold-lifting separation base (31) is provided with a trolley track (17) for carrying the moving trolley (1) to enter and exit the mold-lifting separation mechanism (3) of the iron mold and the model.

5. The sand-coated molding line for multiple large iron molds used in large castings according to claim 1, characterized in that: The iron-type sand-shooting and sand-coating device (4) includes an upper beam (4-1), an air tank (4-2), a sand-coating and sand-shooting head (4-3), a lifting hydraulic cylinder (4-4), a sand-adding hopper (4-7), a base (4-9), a hydraulic station (4-10), multiple guide rods (4-5), multiple telescopic sand-adding pipes (4-6), and multiple columns (4-8). The upper beam (4-1) is fixed on the multiple columns (4-8), and the multiple columns (4-8) are all installed on the base (4-9). The sand-adding hopper (4-7) is installed on the upper beam (4-1), and multiple telescopic sand-adding pipes (4-6) are evenly distributed and fixed below the sand-adding hopper (4-7). The bottom of the telescopic sand-adding pipe (4-6) is connected to the sand-coating and sand-shooting head (4-3) below; the upper part of the multiple guide rods (4-5) is connected to the compressed air ventilation hose of the air bag (4-2), and the lower part of the multiple guide rods (4-5) is installed on the upper plane of the sand-coating and sand-shooting head (4-3); the lifting hydraulic cylinder (4-4) is fixed on the upper beam (4-1) and is used for lifting and clamping the sand-coating and sand-shooting head (4-3); the hydraulic station (4-10) is installed on the upper beam (4-1), and the base (4-9) is equipped with the trolley track (17) for the large iron mold and model carrying mobile trolley (1) to enter and exit the iron mold sand-shooting and sand-coating device (4).

6. The sand-coated molding line for multiple large iron molds used in large castings according to claim 5, characterized in that: The iron-type sand-shooting and sand-covering device (4) also includes a safety fence (4-11), which is installed on the upper beam (4-1).

7. The sand-coated molding line for multiple large iron molds used in large castings according to claim 5, characterized in that: The upper beam (4-1), column (4-8), and base (4-9) are connected together to form a rigid frame structure.

8. The sand-coated molding line for multiple large iron molds used in large castings according to claim 1, characterized in that: The iron mold and model grasping and moving mechanism (5) includes a gantry rail frame (51), a moving frame (53), a grasping and moving lifting cylinder (54), a grasping and moving upper beam (55), a grasping and moving lower beam (56), a model iron mold lifting hook (58), multiple grasping and moving columns (52), and multiple grasping and moving guide rods (57). The grasping and moving lifting cylinder (54) is installed on the moving frame (53), and the piston rod in the grasping and moving lifting cylinder (54) is connected to the grasping and moving lower beam. The beams (56) are connected, and the upper part of the multiple grabbing and moving guide rods (57) is connected to the grabbing and moving upper beam (55). The lower part of the multiple grabbing and moving guide rods (57) passes through the moving frame (53) and is connected to the grabbing and moving lower beam (56). A model iron lifting hook (58) is provided below the grabbing and moving lower beam (56). The moving frame (53) is movably set on the gantry rail frame (51), and the gantry rail frame (51) is fixed on the multiple grabbing and moving columns (52).

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