Pass-type drawing device and method for multiple large iron molds with different cavities

Abstract

The invention relates to a through-type drawing device and method for a plurality of large iron molds with different cavities, and belongs to the field of machinery. The device comprises a movable trolley track, a hoisting travelling crane used for conveying the iron mold, a plurality of movable trolleys capable of bearing the iron mold and the model, and a fixed iron mold and model drawing separation mechanism arranged on a drawing separation station, and the plurality of movable trolleys are all arranged on the movable trolley track; movable trolley rails are arranged on the two sides of the fixed type iron mold and model drawing separation mechanism, and a lifting crane is arranged above the fixed type iron mold and model drawing separation mechanism. The invention further provides a working method of the through-type drawing device for the multiple large iron molds with the different cavities. The device is reasonable in structural design, safe, reliable, convenient to install, reliable in operation, low in labor intensity, high in mechanization degree, good in drawing quality of iron mold casting, smooth in technological process and capable of meeting use requirements.

Description

Technical Field

[0001] The present invention relates to a device and a method, in particular to a through-type demoulding device and method for multiple large iron molds with different cavities, which is applied to demoulding and separation between the model and the iron mold after the sand shooting and sand covering molding of multiple large iron molds is completed in the iron mold sand covering casting production, and belongs to the field of machinery. Background Art

[0002] Iron mold sand casting belongs to the category of special casting. Its casting production has the advantages of being green, high-quality, energy-saving, environmentally friendly and low-cost. It is mainly used in the casting production of large quantities of small and medium-sized castings.

[0003] With the rapid development of equipment manufacturing industry in recent years, some large-scale equipment has put forward higher requirements on the quality of its castings. The productivity requirements of such castings (such as main shaft castings and planetary carrier castings in wind power castings) are not high, and they are large castings (casting weight is more than 10 tons, and the maximum size is 3-6 meters). The casting molds used for casting production often need to be composed of multiple casting molds.

[0004] It is difficult to meet the requirements of these large-scale equipment for internal structure, performance, appearance, dimensional roughness, dimensional accuracy, etc. when producing such castings using traditional sand casting production methods. High-quality castings have become the key bottleneck for improving such equipment. Iron mold sand castings are gradually being used in the production of these castings due to their unique characteristics of rapid cooling, extremely high mold rigidity, dense and smooth mold surface, and the shrinkage compensation effect of graphitization expansion during cast iron solidification. The weight of castings produced by iron mold sand casting has also gradually expanded from the traditional few kilograms to hundreds of kilograms to castings of several tons to tens of tons. At the same time, as far as the casting parting process in iron mold sand casting production is concerned, it has also extended from the traditional upper and lower two-opening molds to three-opening molds, four-opening molds, five-opening molds and other multi-opening mold forms.

[0005] Traditional iron mold sand-coated molding equipment can hardly meet the production needs of iron mold sand-coated casting of these large castings. It is very important to develop new sand-coated molding equipment for multiple different large iron molds, as well as matching iron mold and model demolding devices, which is one of the important conditions for realizing mass production of large-scale iron mold sand-coated casting. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned shortcomings in the prior art and to provide a through-type demolding device and method for multiple large iron molds with different cavities, which has a reasonable structural design, is safe and reliable, is easy to install, has reliable operation, has low labor intensity, a high degree of mechanization, has good demolding quality for iron mold castings, and has a smooth process flow.

[0007] The technical solution adopted by the present invention to solve the above-mentioned problem is: the through-type demoulding device for multiple large iron molds with different cavities includes a mobile trolley track, a lifting crane for iron mold transportation and multiple mobile trolleys that can carry iron molds and models, and the multiple mobile trolleys are all arranged on the mobile trolley track, which is characterized by: it also includes a fixed iron mold and model demoulding separation mechanism arranged on the demoulding separation station, and the fixed iron mold and model demoulding separation mechanism is provided with a mobile trolley track on both sides, and a lifting crane is arranged above the fixed iron mold and model demoulding separation mechanism; the fixed iron mold and model demoulding separation mechanism includes a base, a track, a demoulding beam, a demoulding support beam, a demoulding support, a column, a lifting crane ... A mold hydraulic cylinder, a lifting guide rod, a guide sleeve and a clamping mechanism, two tracks for the mobile trolley are installed on the base, and a demolding support and several columns for separating the iron mold and the model from the mold are fixed on both sides of the track, and several columns are connected to the demolding support; two lifting demolding hydraulic cylinders for separating the iron mold and the model and two guide sleeves for guiding the lifting guide rods are installed on the upper plane of each demolding support; several clamping mechanisms are fixed on each demolding support, the lower plane of each demolding beam is connected to the piston rod heads of the two lifting demolding hydraulic cylinders, two lifting guide rods for guiding the demolding crossbeam when lifting and lowering the demolding are installed on both sides of the lower plane of each demolding beam, and the two demolding beams are fixedly connected by two demolding support beams.

[0008] Preferably, the mobile trolley of the present invention comprises a body, a positioning structure, wheels and guide wheels, a plurality of positioning structures are arranged on the upper part of the body, and a plurality of wheels and guide wheels are arranged on the lower part of the body.

[0009] Preferably, the positioning structure of the present invention is composed of four positioning pins installed on the work surface of the vehicle body and distributed in a cross shape.

[0010] Preferably, the demoulding beam of the present invention adopts a liftable working beam, which is used for demoulding and separating the iron mold and the model.

[0011] Preferably, the clamping mechanism of the present invention adopts an inclined wedge-type clamping mechanism that can move back and forth laterally; it is used to fix the model and the mobile trolley on the mobile trolley track when the iron mold is separated from the model by demolding.

[0012] The present invention also provides a working method of a through-type demoulding device for a plurality of large iron molds with different cavities, characterized in that the specific steps are as follows: the demoulding beam in the demoulding separation mechanism of the fixed iron mold and the model is lowered to the lowest position by the action of the demoulding hydraulic cylinder, and the inclined wedge in the clamping mechanism is laterally moved out to the outermost position under the action of the clamping pneumatic device; the mobile trolley located on one side of the fixed iron mold and the model demoulding separation mechanism and loaded with the iron mold and the model that have been completed by sand injection and sand coating automatically enters the demoulding separation station and stops; the upper plane of the demoulding beam is located below the lower plane of the demoulding running edge of the iron mold, and the two planes are mutually aligned. No contact; the lower plane of the inclined wedge clamping block in the inclined wedge clamping mechanism and the corresponding upper plane of the base clamping plate in the model base also do not contact each other; the inclined wedge clamping block is inserted horizontally into the model base under the action of the clamping pneumatic device, and when the lower plane of the inclined wedge clamping block and the plane of the base clamping plate on the model base are completely in contact and fit together, the model and the mobile trolley are tightly fixed on the track plane of the mobile trolley; then the lifting and demoulding hydraulic cylinder is started to rise, driving the demoulding beam to rise, and when the upper plane of the demoulding beam contacts the lower plane of the iron mold running edge, the lifting and demoulding hydraulic cylinder and the demoulding beam continue to rise, and the lifting and demoulding liquid The lifting force of the pressure cylinder drives the iron mold to rise together. At the same time, the model and the mobile trolley are firmly fixed on the track of the mobile trolley and remain motionless under the clamping force of the clamping mechanism. As the lifting and demolding hydraulic cylinder drives the demolding beam to rise continuously, the iron mold and the model are gradually separated. When the lifting and demolding hydraulic cylinder and the demolding beam rise to the highest point, the lower plane of the iron mold is higher than the highest point of the model, and the iron mold and the model are completely separated. The lifting rope of the lifting crane is tied to the iron mold. After the lifting crane bears all the weight of the iron mold, the lifting and demolding hydraulic cylinder drives the demolding beam to descend to the lowest point. position; then the iron mold is lifted away from the demoulding and separation station by a lifting crane. After the modeling is completed, the iron mold and the model are demoulded and separated; then the inclined wedge clamping block in the clamping mechanism is moved laterally to the outermost position under the action of the clamping pneumatic device, and the inclined wedge clamping block is completely separated from the clamping plate of the model base, and the clamping mechanism releases the fixed clamping effect with the model and the mobile trolley, and the mobile trolley carrying the model automatically and completely drives away from the demoulding and separation station, thereby completing the demoulding and separation operation of an iron mold and the corresponding model; the cycle is repeated in sequence to complete the demoulding and separation operations between multiple iron molds with different cavity shapes and models.

[0013] Compared with the prior art, the present invention has the following advantages and effects: 1) The overall structural design is reasonable, safe and reliable. Through a demoulding device of the present invention, in the production of large-scale castings of iron mold covered with sand casting, after the different large-scale iron molds of the iron mold covered with sand casting are formed by sand shooting and sand covering, the demoulding and separation operations between each large-scale iron mold and the model can be completed; 2) The demoulding and separation operations between each large-scale iron mold casting and each model are carried out by using the device of the present invention, and the process flow is smooth, the degree of mechanization is high, the labor intensity is low, and the demoulding and separation operations between multiple large-scale iron molds and the model can be easily realized. Automated control and good demolding quality of iron mold casting; 3) Multiple mobile trolleys are used to load different iron molds / models, and the demolding device of the present invention is used in turn to operate, and the number of iron molds / models that can be demolded and separated by different iron molds / models is unlimited; 4) The demolding device of the present invention through multiple different large iron molds has low investment cost, convenient equipment installation, reliable operation and low maintenance cost; 5) Combined with other supporting devices, a large-scale iron mold sand-covered casting molding line can be formed to realize the mechanized production of large-scale iron mold sand-covered castings, thereby realizing the mass production of large-scale castings cast by iron mold sand-covered castings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a large main shaft casting (wind turbine main shaft casting) according to an embodiment of the present invention. Figure 1 .

[0015] Figure 2 This is a schematic diagram of the structure of a large main shaft casting (wind turbine main shaft casting) according to an embodiment of the present invention. Figure 2 .

[0016] Figure 3 It is a schematic diagram of the iron mold after assembly for casting a wind turbine main shaft according to an embodiment of the present invention.

[0017] Figure 4 It is a schematic diagram of the overall structure of a through-type demoulding device for a plurality of large iron molds with different cavities according to an embodiment of the present invention.

[0018] Figure 5 It is a schematic diagram of the main structure of the fixed iron mold and the mold stripping and separation mechanism in an embodiment of the present invention.

[0019] Figure 6 It is a side view structural schematic diagram of a fixed iron mold and a mold demoulding and separation mechanism in an embodiment of the present invention.

[0020] Figure 7 It is a schematic diagram of the top view of the structure of the fixed iron mold and the mold demoulding and separation mechanism in the embodiment of the present invention.

[0021] Figure 8 It is a three-dimensional structural schematic diagram of a fixed iron mold and a mold demoulding and separation mechanism in an embodiment of the present invention.

[0022] Fig. 9 The invention discloses a schematic diagram of the structure and mold closing of an iron mold and a model for a through-type iron mold and a model demoulding and separation device according to an embodiment of the present invention.

[0023] Fig.10 It is a schematic diagram of the main structure of the mobile trolley in an embodiment of the present invention.

[0024] Fig.11 It is a schematic diagram of the side structure of the mobile trolley in an embodiment of the present invention.

[0025] Fig.12 1 is a schematic diagram of the top view of the mobile trolley in an embodiment of the present invention.

[0026] Fig.13 It is a schematic diagram of the three-dimensional structure of the mobile trolley in an embodiment of the present invention.

[0027] Fig.14 It is a schematic diagram of the clamping mechanism chuck withdrawing from the demolding beam and descending to the lowest level during the demolding and separation process between multiple large iron molds with different cavities and the model in an embodiment of the present invention.

[0028] Fig.15 It is a schematic diagram of the iron molds and the model entering the demolding station during the demolding and separation process between multiple large iron molds with different cavities and the model in an embodiment of the present invention.

[0029] Fig.16 It is a schematic diagram of the process of demolding and separating between multiple large iron molds with different cavities and a model in an embodiment of the present invention, in which the clamping mechanism chuck withdraws, the demolding beam descends to the lowest iron mold, and the model enters the demolding station.

[0030] Fig.17 It is a schematic diagram of a clamping mechanism extending to clamp and fix the model and a moving trolley during the demolding and separation process between a plurality of large iron molds with different cavities and the model in an embodiment of the present invention.

[0031] Fig.18 It is a schematic diagram of the demoulding beam rising to separate the top iron mold from the model during the demoulding and separation process between multiple large iron molds with different cavities and the model in an embodiment of the present invention.

[0032] Fig.19 It is a schematic diagram of a crane hoisting an iron mold during the demoulding and separation process between a plurality of large iron molds with different cavities and a model in an embodiment of the present invention.

[0033] Fig. 20 It is a schematic diagram of a process of demolding and separating a plurality of large iron molds with different cavities from a model in an embodiment of the present invention, in which a demolding cylinder and a demolding beam are lowered to the lowest position and a crane is used to lift the iron mold away from the demolding station.

[0034] Fig.21It is a schematic diagram of the clamping mechanism exiting the clamping state model of the model trolley and the moving trolley leaving the demolding station during the demolding separation process between multiple large iron molds with different cavities and the model in an embodiment of the present invention.

[0035] In the figure: a fixed iron mold and model demoulding and separation mechanism 1, a mobile trolley 2, a mobile trolley track 3, a lifting crane 4, a demoulding and separation station 5, an iron mold 6, and a model 7; Fixed iron mold, model demoulding separation mechanism 1: base 10, track 11, demoulding beam 12, demoulding support beam 13, demoulding support 14, column 15, demoulding lifting hydraulic cylinder 16, lifting guide rod 17, guide sleeve 18, clamping mechanism 19; Mobile trolley 2: body 21, positioning structure 22, wheels 23, guide wheels 24; Positioning pin 61, positioning pin hole 62, lifting ring 63, model base 71, base clamping plate 72; The chuck is withdrawn to position T1 and clamped to position T2. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0037] Example

[0038] See also Figures 1 to 21 The through-type demolding device for multiple large iron molds with different cavities in this embodiment includes a fixed iron mold and a model demolding separation mechanism 1 arranged on a demolding separation station 5, a mobile trolley 2 carrying an iron mold 6 and a model 7, mobile trolley tracks 3 on both sides of the fixed iron mold and the model demolding separation mechanism 1, and a lifting crane 4 above the fixed iron mold and the model demolding separation mechanism 1.

[0039] The demoulding and separation operation of the iron mold and the model is completed at the demoulding and separation station 5. After the demoulding and separation is completed, the iron mold and the model successively leave the fixed iron mold and model demoulding and separation mechanism 1 arranged on the demoulding and separation station 5.

[0040] As attached Figure 5-Figure 8As shown, the fixed iron mold and model demoulding separation mechanism 1 of this embodiment includes a base 10, a track 11, a demoulding beam 12, a demoulding support beam 13, a demoulding support 14, a column 15, a lifting demoulding hydraulic cylinder 16, a lifting guide rod 17, a guide sleeve 18 and a clamping mechanism 19; the base 10 is a steel structure welded part, which carries all the components of the fixed iron mold and model demoulding separation mechanism 1; two tracks 11 for the mobile trolley 2 to travel are fixed on the base 10; demoulding supports 14 and several columns 15 for demoulding separation of the iron mold and the model are respectively installed on both sides of the track 11, and the several columns 15 are fixed together with the demoulding support 14 to stabilize and support the demoulding support 14.

[0041] Two lifting and demoulding hydraulic cylinders 16 for demoulding and separating the iron mold from the model and two guide sleeves 18 for guiding the lifting and lowering guide rods 17 are fixed on the upper plane of each demoulding support 14; a plurality of clamping mechanisms 19 are also installed on each demoulding support 14, and the clamping mechanism 19 is a wedge-type clamping mechanism that can move back and forth laterally, and adopts a rear-mounted cylinder to move back and forth. When the demoulding separation mechanism performs the demoulding and separation operation of the iron mold 6 and the model 7, the wedge in the clamping mechanism 19 is extended out by the action of the cylinder to be connected with the base clamping plate 72 on the model base 71 (see attached Fig. 9 ) are in contact with each other, the model is clamped and fixed, and when the iron mold is demoulded and raised, the model and the mobile trolley 2 are fixed on the mobile trolley track 3, so as to realize the separation and disengagement between the model 7 and the iron mold 6.

[0042] The demoulding beam 12 is a liftable working beam used for demoulding and separating the iron mold 6 and the model 7. The lower plane of each demoulding beam 12 is fixedly connected to the piston rod heads of two lifting and demoulding hydraulic cylinders 16 used for demoulding and separating. Two lifting guide rods 17 for guiding the demoulding beam 12 when lifting and demoulding are also installed on both sides of the lower plane of each demoulding beam 12; the two demoulding beams 12 are fixedly connected together by two arched demoulding support beams 13 to form a complete demoulding frame structure.

[0043] As attached Figure 10-13 As shown, the mobile trolley 2 for loading the iron mold 6 and the model 7 after sand injection and sand coating molding, which enters and exits the demoulding and separation station 5, comprises a body 21, a positioning structure 22, wheels 23, guide wheels 24 and a self-powered mobile wheel system. The mobile trolley 2 is used to carry and transport the molded iron mold 6 and the model 7 to and from the demoulding and separation station 5. The positioning structure 22 of the mobile trolley is composed of four positioning pins distributed in a cross shape and installed on the working surface of the body 21 of the mobile trolley. When the iron mold 6 and the model 7 are placed on the working surface of the mobile trolley 2, the positioning pins of the mechanism are inserted into the corresponding positioning pin holes on the model base 71 (see attached Fig. 9 ), realize the positioning between the mobile trolley 2 and the iron mold 6 and the model 7. At the same time, when the mobile trolley 2 moves automatically, it can drive the iron mold 6 and the model 7 to move with the mobile trolley 2.

[0044] As attached Fig. 9 As shown, the structure and mold closing schematic diagram of the iron mold and model used in the through-type iron mold and model demolding and separation device are different from the ordinary iron mold and model structure: in this embodiment, a positioning pin hole 62 is provided at the bottom surface of the iron mold, which is used for the mold closing positioning between the model 7 and the iron mold 6, and the mutual positioning between the iron molds 6 when the iron mold casting is molded; a positioning pin 61 is provided on the upper surface of the iron mold 6, which is used for the mutual positioning between the iron molds 6 when the iron mold casting is molded; 4 evenly distributed lifting rings 63 are provided on the side of the iron mold 6, which are used to lift the iron mold 6 from the demolding and separation station 5 by a lifting crane 4 after the iron mold 6 is demolded and separated from the model 7; a cross positioning pin hole is provided on the model base 71, when the iron mold 6 and the model 7 are placed on the mobile trolley 2, the cross positioning pin on the mobile trolley 2 is inserted into the cross pin hole on the model base 71, which is used for positioning between the model and the mobile trolley 2 and the mobile trolley 2 drives the iron mold 6 and the model 7 to move together.

[0045] The process of separating the mold from the model by demoulding the through-type demoulding separation device for multiple large-scale molds with different cavities in this embodiment is as follows (see attached Figure 14-Figure 21): The demoulding beam 12 in the fixed iron mold and model demoulding separation mechanism 1 is lowered to the lowest position by the action of the demoulding hydraulic cylinder 16, and the wedge in the wedge-type clamping mechanism 19 is laterally moved out to the outermost position under the action of the clamping pneumatic device; the mobile trolley 2 located on one side of the fixed iron mold and model demoulding separation mechanism 1 and loaded with the iron mold and model that have been sand-shot and sand-covered automatically enters the demoulding separation station 5 for placing the fixed iron mold and model demoulding separation mechanism 1 and stops; the upper plane of the demoulding beam 12 is located below the lower plane of the demoulding edge of the iron mold, and the two planes do not contact each other; the lower plane of the wedge clamping block in the wedge-type clamping mechanism 19 is aligned with the corresponding plane in the model base 71 The upper planes of the base clamping plate 72 are also not in contact with each other; the inclined wedge clamping block in the inclined wedge clamping mechanism 19 is inserted horizontally into the model base 71 under the action of the clamping pneumatic device, and when the lower plane of the inclined wedge clamping block in the clamping mechanism 19 is completely in contact with the upper plane of the base clamping plate 72 on the model base 71, the model and the mobile trolley 2 are tightly fixed on the plane of the mobile trolley track 3; then the lifting and demoulding hydraulic cylinder 16 is started to rise, driving the demoulding beam 12 to rise, and when the upper plane of the demoulding beam 12 contacts the lower plane of the iron mold running edge, the lifting and demoulding hydraulic cylinder 16 and the demoulding beam 12 continue to rise, and under the action of the lifting and demoulding force of the lifting and demoulding hydraulic cylinder 16, the iron mold is driven. The mold 6 rises together. At the same time, the model 7 and the mobile trolley 2 are firmly fixed on the mobile trolley track 3 and remain motionless under the action of the clamping force of the clamping mechanism 19. As the lifting and demolding hydraulic cylinder 16 drives the demolding beam 12 to rise continuously, the iron mold 6 and the model 7 are gradually separated. When the lifting and demolding hydraulic cylinder 16 and the demolding beam 12 rise to the highest point, the lower plane of the iron mold is higher than the highest point of the model, and the iron mold 6 and the model 7 are completely demolded; the sling of the lifting crane 4 is tied to the iron mold. After the lifting crane 4 bears all the weight of the iron mold, the lifting and demolding hydraulic cylinder 16 drives the demolding beam 12 to descend to the lowest position; then the iron mold can be removed by the lifting crane 4. 6 is lifted off the demoulding and separation station 5 (the iron mold can be moved and transported to the iron mold box closing station), and the demoulding and separation between the iron mold 6 and the model 7 after the modeling is completed; then the oblique wedge clamping block in the oblique wedge clamping mechanism 19 is laterally moved out to the outermost position under the action of the clamping pneumatic device, and the oblique wedge clamping block is completely separated from the model base clamping plate 72, and the clamping mechanism 19 releases the fixed clamping effect with the model and the mobile trolley 2, and the mobile trolley 2 carrying the model can automatically and completely drive away from the iron mold and the demoulding and separation station 5, thereby completing the demoulding and separation operation of an iron mold and the corresponding model; by cycling in sequence, the demoulding and separation operations between multiple iron molds with different cavity types and models can be completed.

[0046] This embodiment Figure 16-17 As shown, through the chuck being withdrawn to the position T1 and the chuck being clamped to the position T2, the specific positions of the chuck withdrawal and clamping can be seen.

[0047] This embodiment uses an iron mold covered with sand casting to cast and produce large castings. Due to factors such as the structure, size, mold release requirements, and other casting process requirements of the casting, more than two large iron molds are often required to be combined to form the iron mold covered with sand casting required for large castings, such as wind turbine main shaft castings (see Figure 2). Figure 1-Figure 2 ), the iron mold with sand casting to form its outer contour uses multiple iron molds of different shapes and sizes (generally 4 pieces along the length direction of the main wind turbine main shaft axis (the height of each iron mold is about 1 meter), many of which are straight-through wind turbine main shaft outer circle castings, and 1 piece is a connecting flange through-type casting); Figure 3 It can be seen that the wind turbine main shaft iron mold sand-coated casting is made by covering the inner cavity of each large iron mold with a layer of coating sand, and then stacking the corresponding wind turbine main shaft outer circular cavity iron mold sand-coated casting molds together in sequence to form a complete wind turbine main shaft outer circular contour cavity iron mold sand-coated casting.

[0048] In this embodiment, the molding sand of the large iron mold sand-coated casting is still selected from thermosetting phenolic resin coated sand with good fluidity, and the molding of the iron mold sand-coated layer casting cavity adopts the traditional sand-shooting and sand-coating method, that is, under the action of compressed air, the coated sand is shot into the gap between the model and the iron mold to form a sand-coating layer, and under the action of heat, the sand-coating layer is solidified, demolded, and finally forms an iron mold sand-coated casting. After the multiple iron molds required for large castings are combined with the model to complete the sand-shooting and sand-coating molding, the function of the device of the present invention is to sequentially complete the demolding and separation operation between the iron mold casting and the model on the device, thereby obtaining each complete iron mold sand-coated casting.

[0049] The principle of the through-type demoulding device for multiple large iron molds with different cavities in this embodiment is as follows: the weight of large cast iron castings is generally 10-30 tons, the length of the castings is 4-6 meters, the width is 2-4 meters, and the height is 2-4 meters. The materials of the castings include ductile iron, gray cast iron, etc. Due to the structure, size, and casting process of these castings, it is often difficult to use only two iron molds to form the castings required for casting production. For example: wind power main shaft castings, among their product dimensions: the length is generally 4-6 meters, the diameter of the connecting flange is 2.8-3.5 meters, and the outer diameter of the main shaft neck is between 1.5-2.0 meters, which belongs to large ductile iron castings. The largest projection diameter of these large iron molds is about 5-6 meters, and the height is about 1 meter. The weight of each iron mold also varies from ten tons to dozens of tons, and the weight of the model is also more than ten tons. When this type of casting is produced by iron mold sand casting, the mold is made of 4-5 pieces of iron molds due to its product structure, size, casting process and other reasons. The iron molds are assembled together in a large pit by a crane. Figure 3), the traditional iron mold sand-covered casting sand-shooting and sand-covering molding devices are often single-station or double-station sand-covering molding machines, that is, each molding machine can complete the sand-covering molding of one iron mold or two different iron molds (lower iron mold) and the demolding and separation of the iron mold and the model. Each sand-covering molding machine includes a set of sand-shooting and sand-covering devices configured with one or two demolding separation devices, or two sets of sand-shooting and sand-covering molding devices configured with two sets of demolding separation devices. After the sand-shooting and sand-covering molding of the iron mold is completed, the iron mold casting is separated from the model demolding through the corresponding demolding separation device, and then the iron mold casting is removed through the iron mold conveying mechanism (generally an iron mold conveying roller) and conveyed to the next process. The model is fixed at the sand-shooting and sand-covering station or the demolding and separation station. If the casting mold of a large casting requires multiple different iron molds, for such multiple large iron molds whose sand shooting and sand covering molding efficiency is not high, the above-mentioned traditional iron mold sand covering molding equipment is not suitable in terms of equipment capital investment, iron mold casting process, iron mold logistics operation, and equipment utilization efficiency. Therefore, a completely new plan is needed for the sand shooting and sand covering molding process of such multiple different large iron molds.

[0050] The through-type demolding device for multiple large iron molds with different cavities in this embodiment is a through-type sand shooting and sand covering molding device for large iron molds. After completing the sand shooting and sand covering molding, multiple mobile trolleys 2 carrying iron molds and models are sequentially entered into a fixed iron mold and model demolding separation mechanism 1 of the present application. Through the demolding separation operation of each actuator of the device, the demolding separation operation of each iron mold casting and each model can be completed in sequence. The separated iron mold and model are both moved out of the fixed iron mold and model demolding separation mechanism 1 of the present application.

[0051] The demoulding and separation efficiency of the multiple iron molds and models, the logistics direction of the iron molds, and the subsequent assembly process requirements of the multiple iron molds can all meet the requirements of large-scale iron mold sand-coated casting production.

[0052] Through the above description, those skilled in the art can already implement it.

[0053] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Technicians in the technical field to which the present invention belongs can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A through-type demoulding device for a plurality of large iron molds with different cavities, comprising a mobile trolley track (3), a lifting crane (4) for conveying the iron molds, and a plurality of mobile trolleys (2) capable of carrying the iron molds and models, wherein the plurality of mobile trolleys (2) are all arranged on the mobile trolley track (3), characterized in that: The invention also comprises a fixed iron mold and model demoulding separation mechanism (1) arranged on a demoulding separation station (5), wherein two moving trolley tracks (3) are arranged on both sides of the fixed iron mold and model demoulding separation mechanism (1), and a lifting crane (4) is arranged above the fixed iron mold and model demoulding separation mechanism (1); the fixed iron mold and model demoulding separation mechanism (1) comprises a base (10), tracks (11), a demoulding beam (12), a demoulding support beam (13), a demoulding support (14), a column (15), a demoulding lifting hydraulic cylinder (16), a lifting guide rod (17), a guide sleeve (18) and a clamping mechanism (19), wherein two tracks (11) for the moving trolley (2) to travel are installed on the base (10), and two tracks (11) are fixed on both sides of the tracks (11). A demoulding support (14) and a plurality of columns (15) are provided for demoulding and separating the iron mold from the model, and the plurality of columns (15) are connected to the demoulding support (14); two demoulding hydraulic cylinders (16) for demoulding and separating the iron mold from the model and two guide sleeves (18) for guiding the lifting guide rods (17) are installed on the upper plane of each demoulding support (14); a plurality of clamping mechanisms (19) are fixed on each demoulding support (14); the lower plane of each demoulding beam (12) is connected to the piston rod heads of the two demoulding hydraulic cylinders (16); two lifting guide rods (17) for guiding the demoulding cross beam (12) when demoulding are lifted are installed on both sides of the lower plane of each demoulding beam (12); and the two demoulding beams (12) are fixedly connected by two demoulding support beams (13).

2. The through-type demoulding device for multiple large iron molds with different cavities according to claim 1, characterized in that: The mobile trolley (2) comprises a body (21), a positioning structure (22), wheels (23) and guide wheels (24); a plurality of positioning structures (22) are arranged on the upper part of the body (21), and a plurality of wheels (23) and guide wheels (24) are arranged on the lower part of the body (21).

3. The through-type demoulding device for multiple large iron molds with different cavities according to claim 2 is characterized in that: The positioning structure (22) is composed of four positioning pins installed on the working surface of the vehicle body (21) and distributed in a cross shape.

4. The through-type demoulding device for multiple large iron molds with different cavities according to claim 1, characterized in that: The demoulding beam (12) is a liftable working beam.

5. The through-type demoulding device for multiple large iron molds with different cavities according to claim 1, characterized in that: The clamping mechanism (19) is an inclined wedge-type clamping mechanism that can move back and forth laterally.

6. A method for operating a through-type demoulding device for a plurality of large iron molds with different cavities, using the through-type demoulding device for a plurality of large iron molds with different cavities as claimed in any one of claims 1 to 5, characterized in that: The specific steps are as follows: the demoulding beam (12) in the fixed iron mold and model demoulding separation mechanism (1) is lowered to the lowest position under the action of the demoulding hydraulic cylinder (16), and the inclined wedge in the clamping mechanism (19) is laterally moved out to the outermost position under the action of the clamping pneumatic device; the mobile trolley (2) located on one side of the fixed iron mold and model demoulding separation mechanism (1) and loaded with the iron mold and model that have been sand-shot and sand-coated is automatically driven into the demoulding separation station (5) and then stopped; the upper plane of the demoulding beam (12) is located below the lower plane of the demoulding runner of the iron mold, and the two planes do not contact each other; the lower plane of the inclined wedge clamping block in the inclined wedge clamping mechanism (19) is opposite to the lower plane of the mold base. The planes on the corresponding base clamping plates are also not in contact with each other; the inclined wedge clamping block is inserted horizontally into the model base under the action of the clamping pneumatic device, and when the lower plane of the inclined wedge clamping block and the plane of the base clamping plate on the model base are completely in contact and fit together, the model and the mobile trolley (2) are tightly fixed on the plane of the mobile trolley track (3); then the lifting and demoulding hydraulic cylinder (16) is started to rise, driving the demoulding beam (12) to rise, and when the upper plane of the demoulding beam (12) contacts the lower plane of the iron mold running edge, the lifting and demoulding hydraulic cylinder (16) and the demoulding beam (12) continue to rise, and under the action of the lifting and demoulding force of the lifting and demoulding hydraulic cylinder (16), the iron mold is driven to rise together. At the same time, the model and the mobile trolley (2) are firmly fixed on the mobile trolley track (3) and remain motionless under the action of the clamping force of the clamping mechanism (19). As the lifting and demoulding hydraulic cylinder (16) drives the demoulding beam (12) to continue to rise, the iron mold and the model are gradually separated. When the lifting and demoulding hydraulic cylinder (16) and the demoulding beam (12) rise to the highest point, the lower plane of the iron mold is higher than the highest point of the model, and the iron mold and the model are completely separated by demoulding; the lifting rope of the lifting trolley (4) is tied to the iron mold. After the lifting trolley (4) bears all the weight of the iron mold, the lifting and demoulding hydraulic cylinder (16) drives the demoulding beam (12) to descend to the lowest position. Then, the iron mold is lifted from the demoulding and separation station (5) by the lifting crane (4). After the modeling is completed, the iron mold and the model are demoulded and separated. Then, the inclined wedge clamping block in the clamping device (19) is laterally moved out to the outermost position under the action of the clamping pneumatic device, and the inclined wedge clamping block is completely separated from the model base clamping plate. The clamping mechanism (19) releases the fixed clamping effect with the model and the mobile trolley (2), and the mobile trolley (2) carrying the model automatically and completely drives away from the demoulding and separation station (5), thereby completing the demoulding and separation operation of a piece of iron mold and the corresponding model. The cycle is repeated in sequence to complete the demoulding and separation operation between multiple pieces of iron molds with different cavity shapes and the model.

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