CN109822059B - Super-huge iron mold sand-coated molding machine device and molding method thereof - Google Patents
Super-huge iron mold sand-coated molding machine device and molding method thereof Download PDFInfo
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- CN109822059B CN109822059B CN201910220157.8A CN201910220157A CN109822059B CN 109822059 B CN109822059 B CN 109822059B CN 201910220157 A CN201910220157 A CN 201910220157A CN 109822059 B CN109822059 B CN 109822059B
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Abstract
The invention relates to a super-large iron mould sand-coated molding machine device and a molding method thereof, belonging to the machinery. The molding machine device comprises a sand shooting and covering mechanism, a die closing and drawing molding trolley, a trolley moving linear rail, an upper beam, an upright post and a base, wherein the sand shooting and covering mechanism is fixed on the upper beam, the upper beam is connected with the base through the upright post, the trolley moving linear rail is fixedly arranged on the base, and the trolley moving linear rail is used for moving the die closing and drawing molding trolley back and forth. The invention also provides a molding method of the molding machine, which has the advantages of simple and reasonable structural design, safety and reliability, stable operation in the processes of mold closing, mold stripping, sand injection and sand covering, low labor intensity of operation, convenient lifting of the iron mold into a molding station, convenient mold cleaning and meeting the use requirement.
Description
Technical Field
The invention relates to a device and a method, in particular to a super-large iron mold sand-lined molding machine device and a molding method thereof, which are applied to sand-lined molding of super-large iron molds and belong to the machinery class.
Background
The sand-coated iron mold casting is special casting, and the casting mold is formed by coating a thin layer of coated sand on the inner cavity of a metal mold; the iron mold sand-lined casting has the characteristics of energy conservation, material saving, high efficiency, high quality, green production and the like, and the application field is wider and wider.
For most mass-produced castings, the tissue production of a mechanized iron mold sand-lined casting production line is generally adopted; however, for small batches of castings, which are particularly large, it is difficult to organize the production in the manner described above. For the castings, the iron mold is produced by adopting the sand-lined casting process, the weight of the iron mold is very heavy, the weight of one iron mold is often 3-5 tons and even heavier, and meanwhile, the yield of the castings is very small, so that the iron mold is not suitable for being organized and produced by adopting a production line. Meanwhile, the in-out conveying mode of the iron mold of the existing sand-lined molding equipment is difficult to meet the requirement, and the sand-lined molding machine which is suitable for the iron mold sand-lined casting production line in the past is not suitable for the iron mold sand-lined molding of castings.
The Chinese patent with publication number 202571189U discloses an utility model patent named "sand-coated molding machine" in Chinese patent with publication number 2012, 12, 05. The device comprises a frame, wherein a sand cover is arranged at the bottom of a top box, a supporting roller way is arranged below the sand cover, and the supporting roller way extends to two sides to form a conveying roller way; the supporting roller way is provided with a stop component. And a pillar is arranged between the supporting roller tables. The pillar is provided with a baffle. The support posts and the baffle are provided with reinforcing ribs. The top of the top box is provided with a sand hopper. A pushing and positioning platform is arranged between the stand columns at one side of the frame. The pushing and positioning platform is provided with a pushing cylinder. The whole conveying and processing method adopts a set of roller ways, the cost is low, but the method is not suitable for castings with large casting sizes, and because the volume and the weight of the iron mold are large, the weight of a single iron mold is generally more than 4-6 tons, the size is generally 3000-6000X1200-1800 mm, and the iron mold is difficult to convey by adopting a roller way conveying mode, the method of the patent roller way is not suitable for sand-coated sand injection molding of large iron molds.
Therefore, the extra-large iron mold sand-coated molding machine which has the advantages of simple and reasonable structural design, safety, reliability and low labor intensity of operation is provided to meet the production requirement of the castings.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the extra-large iron mold sand-covering molding machine device and the molding method thereof, which have the advantages of simple and reasonable structural design, safety and reliability, stable operation in the processes of mold closing, mold stripping, sand injection and sand covering, low labor intensity of operation, convenience in lifting the iron mold into the molding station and convenience in mold cleaning.
The invention solves the problems by adopting the following technical scheme: this extra-large iron mould sand cover molding machine device, including penetrating sand cover sand mechanism, upper beam, stand and base, penetrate sand cover sand mechanism and fix on the upper beam, the upper beam passes through the stand and is connected its characterized in that: the device also comprises a die-closing and die-drawing molding trolley and a trolley moving linear rail, wherein the trolley moving linear rail is fixedly arranged on the base and is used for moving the die-closing and die-drawing molding trolley back and forth; the whole structure is simple and reasonable in design, safe and reliable, the working procedures of die assembly, sand coating solidification, die stripping and the like of the iron mold are finished on the die assembly and die stripping molding trolley, the whole process is stable in operation, the operation is convenient, and the use requirement is met.
Preferably, the die-closing and die-drawing molding trolley comprises a trolley body, a die-closing and die-drawing cylinder, a workbench, a die-drawing rod, a linear guide rail sliding block, a linear guide rail and a die-closing and die-drawing guide rod, wherein the die-closing and die-drawing cylinder is fixedly arranged on the plane of the trolley body, a piston rod of the die-closing and die-drawing cylinder is fixed with the table top of the workbench, the die-drawing rod is arranged on the plane of the trolley body, the linear guide rail sliding block is arranged on the lower plane of the trolley body, the linear guide rail sliding block slides in and out through the linear guide rail, and the die-closing and die-drawing guide rod is arranged on the trolley body; the mold clamping and demolding mold-forming trolley is provided with a mold clamping and demolding cylinder and a workbench, and the mold clamping and demolding processes, the curing of a sand coating layer, the demolding and the like of the iron mold and the mold are completed on the mold clamping and demolding mold-forming trolley.
Preferably, the table of the present invention is lifted up and down by the up and down movement of the piston rod of the mold closing and drawing cylinder.
Preferably, the number of the stripping rods is four, and the four stripping rods are all arranged on the plane of the trolley body through threads at the lower part of the stripping rods; the lifting stroke of the iron mold is adjusted by adjusting the height of the uppermost plane of the lifting rod.
Preferably, the number of the linear guide rail sliding blocks is four, and the four linear guide rail sliding blocks are all arranged on the lower plane of the trolley body; the linear guide rail sliding block can slide on the linear guide rail.
Preferably, the action of the mould closing and drawing mould shaping trolley adopts an electric, pneumatic or hydraulic mechanism; and selecting according to actual conditions.
Preferably, the sand-lined metal mold feeding and discharging molding station does not adopt a roller way conveying mode.
Preferably, the iron mold of the present invention is drawn by a drawing bar.
Preferably, the present invention completes the mold closing, sand layer curing and iron mold stripping steps of the iron mold on the mold closing and stripping molding trolley.
Preferably, the mold closing, curing and demolding station is separated from the sand shooting and sand coating molding station to form two independent stations.
The invention also provides a molding process of the oversized iron mold sand-lined molding machine, which comprises the following steps: in the mould closing, mould lifting and sand covering solidifying stations, a workbench descends to the lowest point, an iron mould is put down and lifted above the station, the iron mould is stably lowered onto a plane formed by the upper planes of four mould lifting rods, the workbench ascends until the plane of a mould template and the lower plane of the iron mould are completely and tightly adhered and combined together, the workbench continues to ascend for a certain distance, the iron mould and a travelling crane lifting appliance are stopped after being separated, and the lifting appliance is moved away from the lifting position of the iron mould; after the die-closing and die-drawing molding trolley moves to enter the incident sand-covering molding station, the die-closing and die-drawing cylinder drives the workbench to continuously ascend until the upper plane of the iron mold and the lower plane of the sand shooting plate are in contact and completely and tightly adhered and cut together; then sand shooting and sand covering molding are carried out; after sand shooting is finished, exhausting the cavity of the sand shooting cylinder, and after the exhaust is finished; the die closing and drawing cylinder descends to drive the workbench to descend, so that the upper plane of the iron type is separated from the lower plane of the sand shooting plate by a certain distance and then stops descending; and then moving the sand-out sand-covered sand molding station of the mold closing and drawing molding trolley to the mold closing, drawing and sand-covered curing station, curing coated sand, lowering a mold closing drawing cylinder after the sand-covered layer is cured, driving a workbench, a mold and an iron mold to descend together, when the lower plane of the iron mold touches the plane of a drawing rod, continuing lowering the workbench and the mold, and contacting the lower plane of the iron mold with the plane of the drawing rod, wherein the iron mold is blocked and stagnated and cannot descend, gradually separating the mold from an iron mold cavity along with the continued lowering of the workbench and the mold until the workbench and the mold descend to the lowest position, wherein the upper plane of the drawing rod is higher than the highest plane or point of the mold, completing the mold and the iron mold to be completely separated, thereby completing the drawing procedure of the mold, and finally lifting the iron mold from the drawing rod by a crane to complete sand-covered molding of the iron mold.
Compared with the prior art, the invention has the following advantages and effects: 1. the whole structure is simple and reasonable in design, safe and reliable, the hanging-in molding station of the iron mold is convenient, and the iron mold can be used for sand-coated molding of an extra-large iron mold; 2. the iron mold does not have any conveying movement relative to the mold in the whole molding process and does not move on a conveying roller way, so that the labor intensity of personnel operation is greatly reduced; 3. the iron type hanging-in modeling station is convenient and quick; the die is convenient to clean and has good sight; 4. the way of entering and exiting the iron mold can greatly simplify the structure of the iron mold, save the prior edge running structure of the iron mold specially arranged at two sides of the iron mold for running on a roller way, and reduce the manufacturing cost of the iron mold; 5. the lifting of the iron mold and the mold is completed by adopting a mode that a fixed lifting rod is used for limiting the falling of the iron mold, and the mold and a workbench are lowered, so that the lifting of the iron mold and the mold is separated, the lifting operation is stable, the device is simple to manufacture, and the lifting plane precision is convenient to adjust.
Drawings
FIG. 1 is a schematic view of a molding machine apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic side view of the structure of fig. 1.
Fig. 3 is a schematic structural view of a mold closing and drawing molding trolley according to an embodiment of the invention.
Fig. 4 is a schematic view of a structure of an iron type molding machine according to an embodiment of the present invention.
Fig. 5 is a schematic view of a structure of an iron type lifting-in mold closing and lifting station according to an embodiment of the present invention.
FIG. 6 is a schematic view of a mold closing structure of an iron mold and a mold according to an embodiment of the present invention.
FIG. 7 is a schematic diagram of a mold closing and stripping molding trolley entering an incident sand station according to an embodiment of the invention.
FIG. 8 is a schematic structural view of a sand coated shot molding according to an embodiment of the present invention.
FIG. 9 is a schematic view of a ferrous, mold release shooting plate in accordance with an embodiment of the present invention.
FIG. 10 is a schematic diagram of a mold closing and stripping molding trolley sand removal station according to an embodiment of the invention.
FIG. 11 is a schematic diagram showing the separation of the iron mold from the model according to the embodiment of the present invention.
FIG. 12 is a schematic diagram of a mold stripping station for an iron mold crane clutch mold according to an embodiment of the invention.
In the figure: the sand shooting and covering mechanism 1, a mold closing and drawing molding trolley 2, a trolley moving linear rail 3, an upper beam 4, a column 5, a sand hopper 6, an air bag 7, a base 8, a mold closing and drawing station 9, a sand shooting and covering station 10, a lifting appliance 11, an iron mold 12, a mold 13, a trolley body 21, a mold closing and drawing cylinder 22, a workbench 23, a drawing rod 24, a linear guide rail slider 25, a linear guide rail 26 and a mold closing and drawing guide rod 27.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and not limited to the following examples.
Examples
Referring to fig. 1 to 12, the extra large iron mold sand-covering molding machine device of the present embodiment comprises a sand-shooting sand-covering mechanism 1, a mold closing and drawing molding trolley 2, a trolley moving linear rail 3, an upper beam 4, an upright post 5 and a base 8, wherein the sand-shooting sand-covering mechanism 1 is fixed on the upper beam 4, the sand-shooting sand-covering mechanism 1 is provided with a sand hopper 6 and an air bag 7, the upper beam 4 is fixedly installed on the four upright posts 5 and connected with the base 8, the trolley moving linear rail 3 is fixedly installed on the base 8, and the trolley moving linear rail 3 is used for the back and forth movement of the mold closing and drawing molding trolley 2; the mould closing and mould drawing trolley 2 can move in and out on the trolley moving linear rail 3, so that the mould closing and mould drawing trolley 2 can enter a sand shooting and sand covering moulding station or can come out from the sand shooting and sand covering moulding station to a mould closing, curing and mould drawing station.
The mold-closing and mold-drawing trolley 2 of the embodiment comprises a trolley body 21, a mold-closing and mold-drawing cylinder 22, a workbench 23, a mold-drawing rod 24, a linear guide rail slide block 25, a linear guide rail 26 and a mold-closing and mold-drawing guide rod 27, wherein the mold-closing and mold-drawing cylinder 22 is fixedly arranged on the plane of the trolley body 21, a piston rod of the mold-closing and mold-drawing cylinder 22 is fixed with the table surface of the workbench 23, the workbench 23 moves up and down along with the up-and-down movement of the piston rod of the mold-closing and mold-drawing cylinder 22, the mold-drawing rod 24 is arranged on the plane of the trolley body 21, the lower plane of the trolley body 21 is provided with the linear guide rail slide block 25, the linear guide rail slide block 25 slides in and out through the linear guide rail 26, and the mold-closing and mold-drawing guide rod 27 is arranged on the trolley body 21.
The number of the stripping rods 24 is four, and the four stripping rods 24 are all arranged on the plane of the trolley body 21 through threads at the lower part of the stripping rods 24; the die stripping stroke of the iron mold 12 can be adjusted by adjusting the height of the uppermost plane of the die stripping rod 24, the height of the uppermost plane of the die stripping rod 24 can be adjusted by rotating the die stripping rod 24, the upper planes of the four die stripping rods 24 are adjusted to be at a horizontal height, and then the upper plane height of each die stripping rod 24 is fixed by screwing a nut on a threaded rod at the lower part of the die stripping rod 24. Four linear guide rail sliding blocks 25 are arranged on the lower plane of the trolley, and the linear guide rail sliding blocks 25 can slide on the linear guide rails 26.
The mold closing and drawing molding trolley 2 can move back and forth on the linear guide rail 26 under the action of the in-out moving power; the moving in and out of the mould closing and drawing mould shaping trolley 2 can adopt an electric, pneumatic or hydraulic mechanism. When the sand-lined molding work is performed on the iron mold 12, the mold 13 is fixedly mounted on the workbench 23, and the actions such as mold closing or mold drawing between the mold 13 and the iron mold 12, close fitting of the iron mold 12 and the sand shooting plate during sand-lined molding can be realized along with the ascending and descending actions of the workbench 23.
In the sand-lined molding device of this embodiment, according to different positions of the movable mold closing and drawing molding trolley 2, there are two stations, namely: the sand shooting and covering station 10, the die closing and drawing station 9 of the iron mold 12 and the die 13; and (3) carrying out die assembly of the iron mold 12 by using a crane lifting tool 11 to the upper part of the die assembly and die drawing trolley 2, placing a die assembly and die drawing device of the iron mold 12 on the die assembly and die drawing trolley 2, feeding the die assembly and die drawing trolley 2 into the sand coating station 10 after die assembly and die drawing trolley 12 is matched with the iron mold 12, removing the die assembly and die drawing trolley 2 after sand coating is completed, and lifting the iron mold 12 away from a molding machine by using a crane after die assembly of the iron mold 12, so as to complete sand coating molding work of the extra-large iron mold 12.
The modeling specific process of the extra-large iron mold sand-lined molding machine in the embodiment is as follows: in the mould closing, mould lifting and sand covering curing stations, a workbench 23 descends to the lowest point, an iron mould 12 is put and lifted above the station, the iron mould 12 is stably lowered onto a plane formed by the upper planes of four mould lifting rods 24, the workbench 23 ascends until the plane of a mould 13 template and the lower plane of the iron mould 12 are completely and tightly adhered and cut together, the workbench 23 continues to ascend for a certain distance, the iron mould 12 and a travelling crane lifting appliance 11 are stopped after being separated, and the lifting appliance 11 is moved away from the lifting position of the iron mould 12; after the die-closing and die-drawing molding trolley 2 moves to enter an incident sand-covering molding station, the die-closing and die-drawing cylinder 22 drives the workbench 23 to continuously ascend until the upper plane of the iron mold 12 and the lower plane of the sand shooting plate are in contact and completely and tightly adhered and combined together; then sand shooting and sand covering molding are carried out; after sand shooting is finished, exhausting the cavity of the sand shooting cylinder, and after the exhaust is finished; the die closing and drawing cylinder 22 descends to drive the workbench 23 to descend, so that the upper plane of the iron mold 12 is separated from the lower plane of the sand shooting plate by a certain distance and then stops descending; and then moving the sand-covered sand molding station of the mold closing and demolding trolley 2 to the mold closing, demolding and sand-covered curing station, curing the precoated sand, lowering the mold closing and demolding cylinder 22 after the sand-covered layer is cured, driving the workbench 23, the mold 13 and the iron mold 12 to descend together, when the lower plane of the iron mold 12 touches the plane of the demolding rod 24, continuing lowering the workbench 23 and the mold 13, and when the lower plane of the iron mold 12 contacts the plane of the demolding rod 24, stopping the iron mold 12 from moving, and failing to descend, and gradually separating the mold 13 from the cavity of the iron mold 12 along with the continued lowering of the workbench 23 and the mold 13 until the workbench 23 and the mold 13 descend to the lowest position, wherein the upper plane of the demolding rod 24 is higher than the highest plane or point of the mold 13, completing the complete separation of the mold 13 and the iron mold 12, thus completing the demolding procedure of the mold 13, and finally lifting the iron mold 12 from the demolding rod 24 by using the crane, and completing the sand-covered molding of the iron mold 12.
The structure and principle of the sand shooting and covering mechanism 1 in this embodiment are similar to those of a common sand covered molding machine, and still air is adopted to sequentially enter a sand shooting barrel and a sand shooting head, and the precoated sand in the sand shooting barrel and the sand shooting head is shot into a gap between the iron mold 12 and the mold 13 through sand shooting holes in the sand shooting head and sand shooting holes in the iron mold 12, so that the sand shooting and covering process is completed.
The embodiment well solves the problem of sand-covered sand injection molding of large iron molds, and the adopted sand-injection sand-covered sand mechanism 1 is similar to a common sand-covered molding machine. The die closing and the die drawing of the iron mold 12 and the in and out of the iron mold 12 and the die 13 are completed by adopting a die closing and die drawing molding trolley 2, namely: the actions of die assembly, sand injection, sand covering, solidification, die stripping and the like of the iron mold 12 are all completed on the die assembly and die stripping molding trolley 2, the iron mold 12 and the die 13 after die assembly are transported to an incident sand station through the die assembly and die stripping molding trolley 2, after sand injection and sand covering are completed, the die assembly and die stripping molding trolley 2 is moved out, after solidification of a sand covering layer is completed, die stripping and die stripping actions of the iron mold 12 and the die 13 are completed on the die assembly and die stripping molding trolley 2, and finally the iron mold 12 is lifted off the sand covering molding device by a crane.
In the embodiment, the mode of the die assembly and drawing trolley 2 is adopted, and the die assembly, sand coating solidification, drawing and other procedures of the iron mold 12 are finished on the die assembly and drawing trolley 2, so that the whole process runs stably; the sand-covered molding of the iron mold is carried out by a mode of integrally feeding and discharging sand on the sand-covered molding station after the iron mold 12 and the mold 13 are clamped on the mold clamping and drawing molding trolley 2 instead of adopting a roller way conveying mode.
When the iron mold 12 is completely ejected, the upper plane of the ejector pins 24 is higher than the highest plane or highest point of the mold 13 after the mold 13 is mounted (i.e., when the lower plane of the iron mold 12 is higher than the highest plane or highest point of the mold 13), so that the iron mold 12 is completely separated from the mold 13.
The mould closing, curing and mould drawing stations are separated from the sand shooting sand coating moulding station to form two independent stations so as to finish sand coating moulding work of the iron mould 12; the large iron mold 12 can be conveniently hoisted and the mold can be conveniently cleaned; and the contact time of the large iron mold 12 and the sand shooting plate in the sand coating molding process of the whole iron mold 12 can be reduced, and the sand coating in the sand shooting head is prevented from being heated and agglomerated due to the heat of the sand shooting plate.
From the above description, those skilled in the art will be able to practice.
In addition, it should be noted that the specific embodiments described in the present specification may vary from part to part, from name to name, etc., and the above description in the present specification is merely illustrative of the structure of the present invention. All equivalent or simple changes of the structure, characteristics and principle according to the inventive concept are included in the protection scope of the present patent. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the invention as defined in the accompanying claims.
Claims (4)
1. The molding method of the extra-large iron mold sand-coated molding machine comprises a sand shooting and coating mechanism, an upper beam, a stand column, a base, a mold closing and drawing molding trolley and a trolley moving linear rail, wherein the sand shooting and coating mechanism is fixed on the upper beam, the upper beam is connected with the base through the stand column, the trolley moving linear rail is fixedly arranged on the base, and the trolley moving linear rail is used for moving the mold closing and drawing molding trolley back and forth; the die closing and drawing molding trolley comprises a trolley body, a die closing and drawing cylinder, a workbench, a drawing rod, a linear guide rail sliding block, a linear guide rail and a die closing and drawing guide rod, wherein the die closing and drawing cylinder is fixedly arranged on the plane of the trolley body, a piston rod of the die closing and drawing cylinder is fixed with the table top of the workbench, the drawing rod is arranged on the plane of the trolley body, the linear guide rail sliding block is arranged on the lower plane of the trolley body, the linear guide rail sliding block slides in and out through the linear guide rail, and the die closing and drawing guide rod is arranged on the trolley body, and the die closing and drawing trolley is characterized in that: the method comprises the following steps:
in the mould closing, mould lifting and sand covering curing stations, a workbench descends to the lowest point, an iron mould is put down and lifted above the station, the iron mould is stably lowered onto a plane formed by the upper planes of four mould rods, the workbench ascends until the plane of a mould plate and the lower plane of the iron mould are completely and tightly adhered and combined together, the workbench continues to ascend for a certain distance, the iron mould and a travelling crane lifting appliance are stopped after being separated, and the lifting appliance is moved away from the lifting position of the iron mould;
After the die-closing and die-drawing molding trolley moves to enter the incident sand-covering molding station, the die-closing and die-drawing cylinder drives the workbench to continuously ascend until the upper plane of the iron mold and the lower plane of the sand shooting plate are in contact and completely and tightly adhered and cut together; then sand shooting and sand covering molding are carried out; after sand shooting is finished, exhausting the cavity of the sand shooting cylinder, and after the exhaust is finished;
The die closing and drawing cylinder descends to drive the workbench to descend, so that the upper plane of the iron type is separated from the lower plane of the sand shooting plate by a certain distance and then stops descending; then moving the sand-out sand-covering molding station of the mold closing and drawing molding trolley to the mold closing, drawing and sand-covering curing station, curing coated sand, after the sand-covering layer is cured, lowering a mold closing drawing cylinder to drive a workbench, a mold and an iron mold to descend together, when the lower plane of the iron mold touches the plane of a drawing rod, continuing lowering the workbench and the mold, and contacting the lower plane of the iron mold with the plane of the drawing rod, wherein the iron mold is blocked and stagnated and cannot descend, and gradually separating from an iron mold cavity along with the continued lowering of the workbench and the mold until the workbench and the mold descend to the lowest position, wherein the upper plane of the drawing rod is higher than the highest plane or point of the mold, completing the complete separation of the mold and the iron mold, thereby completing the drawing procedure of the mold, and finally lifting the iron mold from the drawing rod by a crane, and completing the sand-covering molding of the iron mold;
the iron mold is lifted by a lifting rod; completing die assembly, sand coating solidification and die stripping of the iron mold on a die assembly and die stripping molding trolley; and the mold closing, mold drawing and sand coating curing stations are separated from the sand shooting and sand coating molding stations to form two independent stations.
2. The molding method of the oversized iron mold sand-lined molding machine of claim 1, wherein: the number of the stripping rods is four, and the four stripping rods are all arranged on the plane of the trolley body through threads at the lower part of the stripping rods.
3. The molding method of the oversized iron mold sand-lined molding machine of claim 1, wherein: the four linear guide rail sliding blocks are arranged on the lower plane of the trolley body.
4. The molding method of the oversized iron mold sand-lined molding machine of claim 1, wherein: the action of the die closing and drawing molding trolley adopts an electric, pneumatic or hydraulic mechanism.
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| CN102861880A (en) * | 2012-10-15 | 2013-01-09 | 浙江省机电设计研究院有限公司 | Sand-coating molding device and method for large metal mold |
| CN104190878A (en) * | 2014-08-08 | 2014-12-10 | 宁国市志诚机械制造有限公司 | Core shooter |
| CN210498276U (en) * | 2019-03-22 | 2020-05-12 | 浙江省机电设计研究院有限公司 | Super-huge iron mold sand-lined molding machine device |
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| CN109822059A (en) | 2019-05-31 |
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