Casting sand mold removable flask molding device

Abstract

A casting sand mold removable flask molding device relates to the field of casting sand mold molding devices and comprises a mold frame, a mold bottom plate, a sand mold sample, a sand mold outer frame, an air cylinder, an ejector rod bottom plate and an ejector rod, the upper end face of the mold frame is a molding operation platform provided with the mold bottom plate, the sand mold sample is limited and placed on the mold bottom plate, the sand mold outer frame is fixedly mounted on the mold bottom plate, and the ejector rod bottom plate is arranged on the mold bottom plate. The sand mold pattern can be combined with the sand mold outer frame to form the outer contour of a casting sand mold structure, the ejector rod bottom plate is hung on the lower portion of the mold bottom plate in a balanced mode through the ejector rod guide rod perpendicularly installed on the mold bottom plate, the upper end face of the ejector rod is flush with the parting surface of the sand mold pattern when the ejector rod bottom plate is in a natural suspension state, and the air cylinder is arranged on the lower portion of the ejector rod bottom plate. According to the device, the ejector rod is used for pushing and supporting the casting sand mold, so that the casting sand mold can be integrally mechanically and pneumatically controlled to be stripped, the preparation quality, the structural accuracy and the quality stability of the casting sand mold are guaranteed, the labor intensity of workers is reduced, the production working efficiency is improved, and the production input cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of casting sand mold molding devices, and particularly to a stripping flask molding device for casting sand molds. Background Art

[0002] In casting production, the traditional preparation method of casting sand molds generally adopts the flask molding process. Usually, a split flask combined configuration with horizontal parting is used. After sand injection molding, the flasks are disassembled to separate and remove the mold. This combined flask molding method requires manual operation or manual operation assisted by mechanical devices for flask closing, flask opening, and mold removal. Not only is the labor intensity relatively large and the work efficiency relatively low, but there are inevitably docking errors in the combined flask body, which directly affects the structural accuracy and quality stability of the prepared sand mold. During the flask opening and mold removal processes, it is extremely easy to cause surface damage to the prepared sand mold, destroying the quality of sand mold preparation and affecting the casting quality of castings. Therefore, in actual production, the stripping flask molding process for casting sand molds has gradually been widely promoted and applied. This process uses a combined mold box to replace the traditional integral flask to prepare the casting sand mold. After the casting sand mold is molded, the mold box is removed to separate the casting sand mold from the mold box. In production applications, it can effectively reduce the production labor intensity, improve the production work efficiency, and to a certain extent improve the accuracy of the casting sand mold and the quality of the casting sand mold. However, since the stripping flask molding process currently promoted and applied in production uses the removal method of disassembling the mold box to separate the casting sand mold, obviously, there is still a risk of damaging the surface quality of the casting sand mold when manually operating to strip and disassemble the combined mold box on the molded casting sand mold, and there is still further room and potential for reducing the labor intensity and improving the production efficiency. Therefore, it is necessary to research and explore new methods for the stripping flask molding process of casting sand molds and develop new devices for stripping flask molding of casting sand molds to solve the existing technical problems. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a stripping flask molding device for casting sand molds, which reduces the labor intensity of workers for stripping flask molding of casting sand molds, improves the production work efficiency, and ensures the quality of casting sand molds.

[0004] The present invention relates to a device for removing sand molds from a casting box, comprising: a mold frame, a mold base plate, a sand mold pattern, a sand mold outer frame, a cylinder, a push rod base plate and a push rod installed on the push rod base plate; the mold frame is a structural frame, and the upper end face is a molding operation platform, the mold base plate is fixedly installed on the molding operation platform, and a limiting structure corresponding to the sand mold pattern structure and a connecting structure corresponding to the sand mold outer frame structure are arranged on the plate surface of the mold base plate. When the sand mold pattern is limitedly placed on the mold base plate and the sand mold outer frame is fixedly installed on the mold base plate, the sand mold pattern can cooperate with the sand mold outer frame of the side enclosure frame structure to form the outer contour of the sand mold structure of the casting, and then sand filling molding can be carried out in the outer contour of the sand mold structure, and the outer contour of the sand mold structure is an obstacle-free structure relative to the upper port, so that the casting sand mold prepared by filling sand molding in the outer contour of the sand mold structure can be removed from the sand mold The upper end of the push rod is respectively passed through the push rod holes correspondingly opened on the mold bottom plate and the sand mold pattern, and when the push rod bottom plate is naturally limited and suspended by the push rod guide rod, the upper end surface of the push rod is respectively kept flush with the parting surface of the sand mold pattern at the corresponding position; the cylinder is correspondingly arranged at the lower part of the push rod bottom plate and fixedly connected to the mold frame, and the power drive of the cylinder can push the push rod bottom plate to move upward, so that the push rod is lifted and extended into the outer contour of the sand mold structure, and the prepared casting sand mold is pushed out from the outer contour of the sand mold structure.

[0005] The device for removing sand mold from the casting box also includes: a lateral molding block, and through holes with structures corresponding to the lateral molding blocks are opened on the sand mold outer frame. The lateral molding block can be inserted from the outside of the sand mold outer frame through the through holes and extend to the inside of the sand mold outer frame, and is restricted and positioned by the sand mold outer frame. It cooperates with the sand mold pattern and the sand mold outer frame to form the outer contour of the sand mold structure, meeting the design requirements of the casting structure. When the prepared casting sand mold needs to be vertically removed from the sand mold structure outer contour, the lateral molding block can be pulled out and removed from the sand mold outer frame, thereby removing the upward obstruction of the casting sand mold by the lateral molding block, and ensuring that the casting sand mold can be smoothly removed from the box.

[0006] The described sand mold stripping and molding device for castings further includes: a push support plate, which is horizontally arranged below the ejector rod bottom plate and fixedly connected to the piston rod of the air cylinder, enabling the air cylinder to apply an upward driving force to the ejector rod bottom plate through the push support plate, and using the push support plate to apply a driving force distributed in a planar state to the ejector rod bottom plate to ensure the balance of the pushing effect on the ejector rod bottom plate.

[0007] In the described sand mold stripping and molding device for castings, preferably, a push plate guide rod is fixedly installed on the mold frame. The push plate guide rod is vertically arranged and corresponds to and cooperates with a guide sleeve installed on the push support plate to limit and guide and dynamically balance the vertical movement state of the push support plate, so that the push support plate always maintains a horizontal setting state during the movement process.

[0008] In the described sand mold stripping and molding device for castings, preferably, load-bearing pins are arranged and installed on the push support plate. The load-bearing pins are evenly and symmetrically arranged on the plate surface of the push support plate, enabling the push support plate to apply a driving force distributed in a planar state to the ejector rod bottom plate in a point-contact manner, thereby improving the stability of the pushing effect on the ejector rod bottom plate.

[0009] The beneficial effect of the present utility model is to provide a sand mold stripping and molding device for castings, which realizes the overall mechanized pneumatic control of mold lifting and box stripping for the casting sand mold by using the ejector rod to push and support the casting sand mold, replacing the separation and box stripping method of manually peeling and disassembling the mold box for the casting sand mold in the prior art. It can significantly reduce or avoid the phenomenon of damaging the surface of the casting sand mold, not only improving the current sand mold stripping and molding process method for castings and ensuring the preparation quality of the casting sand mold, but also significantly reducing the labor intensity of workers and improving the production work efficiency. At the same time, a combined mold box structure of a sand mold pattern and a sand mold outer frame is adopted, and the mold box can be recycled once for preparing the casting sand mold, which can fully ensure the structural accuracy and quality stability of the casting sand mold. In particular, the sand mold pattern and the sand mold outer frame can be interchanged and combined, enabling the sand mold pattern and the sand mold outer frame to be shared among different models of products in the same series, improving the versatility of the tooling facilities, realizing flexible production, reducing production input, and effectively reducing production costs. Description of the Drawings

[0010] Figure 1 It is a three-dimensional view of the sand mold stripping and molding device for the rotating sleeve of a railway freight train.

[0011] Figure 2 It is a front view of the sand mold stripping and molding device for the rotating sleeve of a railway freight train.

[0012] Figure 3 It is a side view of the sand mold stripping and molding device for the rotating sleeve of a railway freight train.

[0013] Figure 4It is a three-dimensional view of the box-removing state of the rotating sleeve sand mold box-removing molding device for railway freight trains.

[0014] Among them: 1 is the mold frame, 2 is the mold bottom plate, 3 is the sand mold pattern, 4 is the sand mold outer frame, 5 is the air cylinder, 6 is the ejector rod bottom plate, 7 is the ejector rod, 8 is the ejector rod guiding rod, 9 is the lateral molding block, 10 is the push support plate, 11 is the push plate guiding rod, 12 is the guiding sleeve, 13 is the load-bearing pin, 14 is the rotating sleeve sand mold, 15 is the pneumatic switch, and 16 is the bearing plate. Specific implementation mode

[0015] Furthermore, in combination with specific embodiments and their accompanying drawings, the technical solutions claimed in the present utility model will be specifically described.

[0016] A rotating sleeve sand mold box-removing molding device for railway freight trains, as Figures 1 to 3 shown, is composed of a mold frame 1, a mold bottom plate 2, a sand mold pattern 3, a sand mold outer frame 4, an air cylinder 5, an ejector rod bottom plate 6, ejector rods 7, ejector rod guiding rods 8, lateral molding blocks 9, push support plates 10, push plate guiding rods 11, a pneumatic switch 15 and a bearing plate 16; the mold bottom plate 2 is fixedly installed on the upper end surface of the mold frame 1 to form a molding operation platform for the casting sand mold, the sand mold pattern 3 is placed in a limited position on the mold bottom plate 2, the sand mold outer frame 4 is fixedly installed on the mold bottom plate 2, and 6 of the lateral molding blocks 9 are respectively inserted and matched in the through holes opened on the sand mold outer frame 4, and the sand mold pattern 3, the sand mold outer frame 4 and the lateral molding blocks 9 cooperate with each other to form the structural outer contour of the rotating sleeve sand mold 14. On the lower plate surface of the mold bottom plate 2, 4 of the ejector rod guiding rods 8 and 4 of the push plate guiding rods 11 are respectively fixedly installed, and the ejector rod guiding rods 8 and the push plate guiding rods 11 are arranged perpendicular to each other correspondingly; the ejector rod bottom plate 6 is horizontally arranged and is balanced and hung on the ejector rod guiding rods 8 and can be guided by the ejector rod guiding rods 8 to move up and down in a balanced manner. On the upper plate surface of the ejector rod bottom plate 6, 12 evenly arranged and vertically arranged ejector rods 7 are fixedly installed, and the ejector rods 7 respectively pass through the mold bottom plate 2 and the sand mold pattern 3, and the upper end surfaces are flush with the parting surfaces of the sand mold pattern 3 at the corresponding positions in the natural hanging state; the bearing plate 16 is horizontally arranged and fixedly connected to the lower ends of the push plate guiding rods 11, the air cylinder 5 is vertically arranged and fixedly installed on the bearing plate 16, the push support plate 10 is horizontally arranged below the ejector rod bottom plate 6 and is fixedly connected to the piston rod of the air cylinder 5. A guiding sleeve 12 corresponding to the structure of the push plate guiding rod 11 is installed on the push support plate 10, and the movement state of the push support plate 10 is limited and guided by the corresponding sleeving and matching of the guiding sleeve 12 and the push plate guiding rod 11. 4 evenly symmetrically arranged load-bearing pins 13 are arranged and installed on the upper plate surface of the push support plate 10; the pneumatic switch 15 is fixedly installed on the mold frame 1 to control the driving working state of the air cylinder 5.

[0017] Apply the sand mold stripping device for the rotating sleeve of a railway freight train described in this embodiment to prepare the rotating sleeve sand mold 14 of a railway freight train, and adopt the following operation method:

[0018] Step 1. After aligning the sand mold pattern 3 with the limiting structure on the mold base plate 2 and placing it stably, fixedly install the sand mold outer frame 4 on the mold base plate 2, and finally sequentially and stably insert the lateral molding blocks 9 into the through holes opened on the sand mold outer frame 4, as Figure 1 shown, to form the outer contour of the sand mold structure of the rotating sleeve sand mold 14;

[0019] Step 2. Use a continuous sand mixer to mix ester-hardened sodium silicate sand or self-hardening resin sand, and at the same time use the continuous sand mixer to fill the sand mold structure outer contour with molding sand, ramming while filling. After filling the molding sand in the sand mold structure outer contour, scrape the upper port end face of the sand mold structure outer contour and let it stand still to wait for the molding sand to harden;

[0020] Step 3. When the hardening strength of the molding sand in the sand mold structure outer contour reaches the requirements of the preparation process, first pull out and remove all the lateral molding blocks 9 from the sand mold outer frame 4 in sequence, and then turn the pneumatic switch 15 to open to control the pneumatic operation of the cylinder 5. The piston rod drives the push support plate 10 to lift along the push plate guide rod 11. The bearing pin 13 on the push support plate 10 acts on the ejector rod base plate 6, pushing the ejector rod base plate 6 to rise along the ejector rod guide rod 8. The ejector rods on the ejector rod base plate 6 rise accordingly, as Figure 4 shown, directly eject the hardened and formed rotating sleeve sand mold 14 from the upper port of the sand mold structure outer contour, so that the rotating sleeve sand mold 14 is completely stripped from the mold, and then turn the pneumatic switch 15 to close to reset the piston rod of the cylinder 5;

[0021] Step 4. Lift and move the ejected and stripped rotating sleeve sand mold 14 and place it on the sand mold support plate to complete the preparation of the rotating sleeve sand mold 14. Subsequently, other subsequent operation operations can be continued.

[0022] After completing the ejection and stripping of the rotating sleeve sand mold 14 in Step 4, just directly turn to the operation of Step 2, reuse the original combined structure of the mold box, refill the molding sand in the sand mold structure outer contour, and prepare the next rotating sleeve sand mold 14. Repeat this cyclic operation until all the rotating sleeve sand molds 14 are produced and prepared.

Claims

1. A sand mold stripping and molding device for castings, characterized in that, Including: A die set (1), a die bottom plate (2), a sand mold pattern (3), a sand mold outer frame (4), a cylinder (5), a ejector rod bottom plate (6), and ejector rods (7) installed on the ejector rod bottom plate (6); the die set (1) is a structural frame body, and its upper end face is a molding operation platform. The die bottom plate (2) is fixedly installed on the molding operation platform. On the plate surface of the die bottom plate (2), there are limit structures corresponding to the structure of the sand mold pattern (3) and connection structures corresponding to the structure of the sand mold outer frame (4). When the sand mold pattern (3) is placed on the die bottom plate (2) in a limited manner and the sand mold outer frame (4) is fixedly installed on the die bottom plate (2) at the same time, the sand mold pattern (3) can cooperate with the sand mold outer frame (4) of the side enclosing frame structure to form the outer contour of the sand mold structure of the casting. The outer contour of the sand mold structure is a structure without obstacles relative to the upper port, so that the casting sand mold prepared by filling sand and molding in the outer contour of the sand mold structure can be vertically removed from the upper port of the outer contour of the sand mold structure; the ejector rod bottom plate (6) is horizontally arranged, and is balanced and hung below the die bottom plate (2) by the ejector rod guide rods (8) vertically installed and fixedly connected to the die bottom plate (2), and can be guided by the ejector rod guide rods (8) to move up and down in a balanced manner along the ejector rod guide rods (8). The ejector rods (7) are vertically arranged on the upper end face of the ejector rod bottom plate (6), and the upper ends respectively pass through the ejector rod holes correspondingly opened on the die bottom plate (2) and the sand mold pattern (3). In the state where the ejector rod bottom plate (6) is naturally limited and suspended by the ejector rod guide rods (8), the upper end faces of the ejector rods (7) are flush with the parting surfaces of the sand mold pattern (3) at the corresponding positions; the cylinder (5) is correspondingly arranged below the ejector rod bottom plate (6) and fixedly connected to the die set (1), and can push the ejector rod bottom plate (6) to move upward by the power drive of the cylinder (5).

2. The casting sand mold stripping and molding device according to claim 1, characterized in that, Further including: Lateral molding blocks (9). At the same time, through holes corresponding to the lateral molding blocks (9) are opened on the sand mold outer frame (4). The lateral molding blocks (9) can be inserted from the outside of the sand mold outer frame (4) through the through holes and extend into the inside of the sand mold outer frame (4), and are limited and positioned by the sand mold outer frame (4), and cooperate with the sand mold pattern (3) and the sand mold outer frame (4) to form the outer contour of the sand mold structure.

3. The stripping device for the casting sand mold according to claim 1 or 2, characterized in that, Still further including: a push support plate (10). The push support plate (10) is horizontally arranged below the ejector rod bottom plate (6) and fixedly connected to the piston rod of the cylinder (5), so that the cylinder (5) applies an upward pushing force to the ejector rod bottom plate (6) through the push support plate (10), and a pushing force distributed in a planar state is applied to the ejector rod bottom plate (6) by the push support plate (10).

4. The casting sand mold stripping and molding device according to claim 3, characterized in that: A push plate guide rod (11) is fixedly installed on the die carrier (1). The push plate guide rod (11) is vertically arranged and corresponds to and cooperates with a guide sleeve (12) installed on the push support plate (10), so as to limit and guide and dynamically balance the vertical movement state of the push support plate (10).

5. The sand mold stripping device for a casting as described in claim 4, wherein: A load-bearing pin (13) is installed on the push support plate (10). The load-bearing pins (13) are evenly and symmetrically arranged on the surface of the push support plate (10), so that the push support plate (10) applies a driving force distributed in a planar state to the ejector rod bottom plate (6) in a point-contact manner.

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