Vertical sand molding machine
By fixing the front end of the lateral hydraulic cylinder in the vertical sand molding machine and moving it to the rear end, combined with precision machining and fastening devices, the problem of shape accuracy of sand mold components under high compaction pressure is solved, and high-precision sand mold production is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DISA IND
- Filing Date
- 2024-12-31
- Publication Date
- 2026-05-15
AI Technical Summary
When handling high compaction pressure, the connection structure of the lateral hydraulic cylinder in existing vertical sand molding machines can easily cause deformation of the side wall of the sand molding chamber, affecting the shape accuracy of the sand mold components.
The piston rod of the lateral hydraulic cylinder is fixedly connected to the rear yoke at the front end and movable to the front end of the sand molding chamber at the rear end. The connection is made secure and aligned by precision machining of the contact surfaces and the use of fastening devices, and the expansion caused by temperature changes and working loads is absorbed.
It effectively avoids inappropriate deviations in the shape of sand mold components, can handle large compaction pressures, and improves the performance and precision of vertical sand molding machines.
Smart Images
Figure CN122033186A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a vertical sand molding machine for producing sand mold components. The vertical sand molding machine includes a sand molding chamber, which is composed of at least a top wall, a bottom wall, and two opposing side walls. At least one of the chamber walls is provided with at least one sand filling port communicating with a sand feeding system. A pressure plate and opposing swing plates are displaceable in the longitudinal direction of the sand molding chamber to compact the sand fed into the sand molding chamber. The pressure plate is displaceable by a central hydraulic cylinder, and the swing plates are displaceable by two lateral hydraulic cylinders respectively arranged on the two opposing side walls. The piston rods of the lateral hydraulic cylinders are arranged to move a rear yoke arranged at the rear end of the sand molding chamber. The rear yoke is connected by means of a connecting rod to a front yoke arranged at the front end of the sand molding chamber. The swing plates are arranged to swing in the front yoke to allow the sand mold components to leave the sand molding chamber through the forward movement of the pressure plate. At least some of the connecting rods are guided in a guide bearing of the sand molding chamber. Background Technology
[0002] EP0231741B1 (Dansk Industri Syndikat A / S) discloses a vertical sand molding machine including a sand molding chamber for producing sand mold components. To compact the sand fed into the sand molding chamber, a swing plate is movable in the longitudinal direction of the sand molding chamber by means of two lateral hydraulic cylinders, each lateral hydraulic cylinder being arranged on a corresponding chamber sidewall, and a pressure plate is movable in the longitudinal direction by means of a central hydraulic cylinder. A piston rod extending from the front end of either lateral hydraulic cylinder is connected by a pivot joint to a rear yoke arranged at the rear end of the sand molding chamber. The rear end of either lateral hydraulic cylinder is connected by a pivot joint to the front end of the corresponding chamber sidewall. The rear yoke is connected by a tie rod to a front yoke arranged at the front end of the sand molding chamber, and the swing plate is oscillatingly arranged in the front yoke. However, very large forces may be involved during the compaction of the sand mold component. Therefore, this type of existing vertical sand molding machine is not suitable for very large vertical sand molding machines because, in such cases, the pivot joint connecting the rear end of the lateral hydraulic cylinder to the front end of the corresponding chamber sidewall may, in some cases, tend to cause slight deformation of the chamber sidewall of the sand molding chamber. During operation, such deformation of the chamber sidewall may adversely affect the produced sand mold parts, as the shape of the sand mold parts may deviate slightly from the desired shape. Furthermore, in the case of relatively large vertical sand molding machines, the pivot joint connecting the piston rod to the rear yoke and the pivot joint connecting the rear end of the lateral hydraulic cylinder to the front end of the corresponding chamber sidewall may not be able to withstand the required loads. Summary of the Invention
[0003] The object of the present invention is to provide a vertical sand molding machine of the type mentioned in the preamble, which is capable of handling even very large compaction pressures without adversely affecting the form of the produced sand mold parts.
[0004] For this purpose, the front end of each piston rod in the lateral hydraulic cylinder is fixedly connected to the rear yoke, the front end of each lateral hydraulic cylinder is fixedly connected to the corresponding chamber sidewall at the rear end of the sand molding chamber, and the rear end of each lateral hydraulic cylinder is displaceably connected to the corresponding chamber sidewall at the front end of the sand molding chamber in the longitudinal direction of the sand molding chamber.
[0005] Thus, because the front end of each lateral hydraulic cylinder is fixedly connected to the corresponding chamber sidewall at the rear end of the sand molding chamber, any torque generated in the joint between the lateral hydraulic cylinder and the corresponding chamber sidewall due to the distance between the centerline of the lateral hydraulic cylinder and the corresponding chamber sidewall can only affect the corresponding chamber sidewall at the rear end of the sand molding chamber, while the compaction of the sand mold component usually occurs at a distance from the rear end of the sand molding chamber and relatively closer to the front end. Furthermore, because the rear end of each lateral hydraulic cylinder is displaceably connected to the corresponding chamber sidewall at the front end of the sand molding chamber in the longitudinal direction, any longitudinal expansion of the lateral hydraulic cylinder due to temperature changes or workload can be absorbed by the displaceable connection, and therefore will not cause any deformation of the corresponding chamber sidewall. Therefore, undue deviation from the desired form of the produced sand mold component can be avoided. Moreover, because the piston rod of the lateral hydraulic cylinder is also fixedly connected to the rear yoke, the vertical sand molding machine according to the invention can handle even very large compaction pressures.
[0006] In one embodiment, the pressure plate and the swing plate are adapted to compact the sand fed into the sand molding chamber in the pressing zone of the sand molding chamber. A rear section of the sand molding chamber, unsuitable for compacting sand, is arranged behind the pressing zone. The front end of each lateral hydraulic cylinder is fixedly connected to the corresponding chamber sidewall in the rear section of the sand molding chamber, and the rear end of each lateral hydraulic cylinder is connected to the corresponding chamber sidewall in the pressing zone of the sand molding chamber. Therefore, it can be ensured, even better, that inappropriate deviations from the desired form of the produced sand mold component can be avoided.
[0007] Preferably, the pressing zone is provided with a wear-resistant plate, making the pressing zone suitable for compacting sand. Preferably, the rear area of the sand molding chamber is not provided with a wear-resistant plate, and therefore is not suitable for compacting sand.
[0008] In a particularly advantageous structural embodiment, the front end of each lateral hydraulic cylinder has a front end block that directly abuts against the corresponding chamber sidewall. Therefore, by precisely machining the contact surface of the chamber sidewall against which the front end block abuts, the alignment tolerance between the lateral hydraulic cylinder and the sand molding chamber in the longitudinal direction can be reduced, thereby improving the performance of the vertical sand molding machine.
[0009] In one embodiment, the front end block directly abuts against a first side surface of the corresponding chamber sidewall, the first side surface being parallel to the overall plane of the corresponding chamber sidewall. The front end block also directly abuts against an end face of the corresponding chamber sidewall, and the end face extends in a direction perpendicular to the overall plane of the corresponding chamber sidewall. Therefore, by precisely machining the first side surface and end face of the chamber sidewall, the alignment tolerance between the lateral hydraulic cylinder and the longitudinal direction of the sand molding chamber can be reduced even better, thereby improving the performance of the vertical sand molding machine.
[0010] In one embodiment, the front end block is clamped against the first side surface by means of at least one bolt, and the front end block is clamped against the end face by means of at least one bolt. Therefore, a robust connection can be provided to ensure that the front end of each lateral hydraulic cylinder is securely connected to the corresponding chamber sidewall at the rear end of the sand molding chamber.
[0011] In one embodiment, the front end block is clamped against the end face of the corresponding chamber sidewall by means of a separate end bracket that abuts against and grips the end face of the front end block, wherein the separate end bracket is clamped against the end face of the corresponding chamber sidewall by means of at least one bolt, and wherein the separate end bracket is clamped against the end face of the front end block by means of at least one bolt. Thus, an even more robust connection can be provided to ensure that the front end of each lateral hydraulic cylinder is fixedly connected to the corresponding chamber sidewall at the rear end of the sand molding chamber.
[0012] In one embodiment, either the front end block or the corresponding chamber sidewall is provided with a front elongated oval hole having a centerline extending in the longitudinal direction of the sand molding chamber and a width extending in the vertical direction. The other of the front end block or the corresponding chamber sidewall is provided with a front guide pin disposed in the front elongated oval hole, and the outer diameter of the front guide pin is not less than the width of the front elongated oval hole minus 1 / 5 mm. Therefore, during the assembly of the vertical sand molding machine, the correct vertical positioning of the front end block on the corresponding chamber sidewall can be achieved without a complex adjustment process. Thus, the alignment tolerance between the lateral hydraulic cylinder and the longitudinal direction of the sand molding chamber can be reduced.
[0013] In one embodiment, the rear end of each lateral hydraulic cylinder has the form of a rear end block, which is arranged to directly abut against the corresponding chamber sidewall. Therefore, by precisely machining the contact surface of the chamber sidewall abutted by the rear end block, the alignment tolerance between the lateral hydraulic cylinder and the sand molding chamber in the longitudinal direction can be reduced, thereby improving the performance of the vertical sand molding machine.
[0014] In a particularly advantageous structural embodiment, the inner contact surface of the rear end block is arranged to directly abut against the second side surface of the corresponding chamber sidewall, and the second side surface is parallel to the overall plane of the corresponding chamber sidewall.
[0015] In one embodiment, the rear end block is held between the retaining surface of the fastening device and the second side surface of the corresponding chamber sidewall, the retaining surface of the fastening device being arranged to abut the outer contact surface of the rear end block, and the distance between the retaining surface of the fastening device and the second side surface of the corresponding chamber sidewall being 1 / 10 mm to 1 mm greater than the distance between the outer contact surface and the inner contact surface of the rear end block. Therefore, the inner contact surface of the rear end block can maintain loose contact with the second side surface of the corresponding chamber sidewall, thereby facilitating proper alignment between the lateral hydraulic cylinders and the longitudinal direction of the sand molding chamber, and simultaneously ensuring that the rear end of each lateral hydraulic cylinder is displaceably connected to the corresponding chamber sidewall in the longitudinal direction of the sand molding chamber, thus allowing the lateral hydraulic cylinders to expand longitudinally due to temperature changes or due to workload.
[0016] In one embodiment, the distance between the retaining surface of the fastening device and the second side surface of the corresponding chamber sidewall is 2 / 10 mm to 7 / 10 mm larger than the distance between the outer contact surface of the rear end block and the inner contact surface of the rear end block. Therefore, even better alignment between the lateral hydraulic cylinder and the longitudinal direction of the sand molding chamber can be achieved.
[0017] In a particularly advantageous structural embodiment, the fastening device includes a bolt that extends through a hole in the rear end block and is screwed into the corresponding chamber sidewall.
[0018] In one embodiment, the fastening device includes a spacer tube disposed in the hole, abutting a first end against the corresponding chamber sidewall, a bolt extending through the spacer tube, a bearing surface of the bolt being fastened against a second end of the spacer tube, and the inner diameter of the hole being larger than the outer diameter of the spacer tube. Therefore, the proper positioning of the retaining surface of the fastening device in the longitudinal direction of the bolt can be ensured by precisely machining the length of the spacer tube and tightening the bolt until the bearing surface of the bolt abuts against the outer end face of the spacer tube and until the inner end face of the spacer tube abuts against the corresponding chamber sidewall. Furthermore, the rear end of each lateral hydraulic cylinder can be easily and repositionably connected to the corresponding chamber sidewall in the longitudinal direction of the sand molding chamber.
[0019] In one embodiment, the retaining surface of the fastening device is formed by a collar of the spacer tube.
[0020] In another embodiment, the retaining surface of the fastening device is the supporting surface of the bolt.
[0021] In one embodiment, the inner diameter of the bore is at least 1 / 2 mm larger than the outer diameter of the spacer tube. Therefore, sufficient displacement capability can be ensured for the rear end of each lateral hydraulic cylinder relative to the corresponding chamber sidewall.
[0022] In one embodiment, one of the rear end block or the corresponding chamber sidewall is provided with a rear oblong hole having a centerline extending in the longitudinal direction of the sand molding chamber and having a width, and the other of the rear end block or the corresponding chamber sidewall is provided with a rear guide pin disposed in the rear oblong hole, and the outer diameter of the rear guide pin is not less than the width of the rear oblong hole minus 1 / 5 mm. Therefore, in a simple manner, the correct vertical positioning of the rear end block on the corresponding chamber sidewall can be achieved without compromising the possibility of displacement of the rear end of each lateral hydraulic cylinder relative to the corresponding chamber sidewall. Thus, the alignment tolerance between the lateral hydraulic cylinder and the longitudinal direction of the sand molding chamber can be reduced.
[0023] In a particularly advantageous structural embodiment, the front end of each lateral hydraulic cylinder has a front end block that directly abuts against the corresponding chamber sidewall, and the rear end of each lateral hydraulic cylinder has a rear end block that is arranged to directly abut against the corresponding chamber sidewall. The front end block and the rear end block of each lateral hydraulic cylinder are fastened against the opposite ends of the corresponding cylinder barrel of the corresponding lateral hydraulic cylinder by means of a plurality of struts extending between the front end block and the rear end block. Attached Figure Description
[0024] The invention will now be explained in more detail below with reference to the very illustrative accompanying drawings and by way of example of embodiments, wherein...
[0025] Figure 1 This is a perspective view of the vertical sand molding machine according to the present invention;
[0026] Figure 2 It is viewed from another perspective. Figure 1 A perspective view of a vertical sand molding machine;
[0027] Figure 3 yes Figure 1 Side view of a vertical sand molding machine;
[0028] Figure 4 It shows a view at a larger scale and from a slightly different perspective. Figure 1 Details of a vertical sand molding machine;
[0029] Figure 5It is viewed at a larger scale and from a different perspective. Figure 1 A detailed perspective view of a vertical sand molding machine;
[0030] Figure 6 This is shown before attaching the separate second funnel component and before the rear wall of the attachment chamber. Figure 1 A perspective view of the sand molding chamber of a vertical sand molding machine;
[0031] Figure 7 However, for illustrative purposes, the sand-sculpting room was removed, and the view was taken from another perspective. Figure 1 A perspective view of a vertical sand molding machine;
[0032] Figure 8 Through Figure 1 Axial sectional view of the horizontal plane of a vertical sand molding machine;
[0033] Figure 9 yes Figure 1 A perspective view of the left-side hydraulic cylinder of a vertical sand molding machine before it is attached to the vertical sand molding machine.
[0034] Figure 10 yes Figure 9 A top view of the hydraulic cylinder from the left side;
[0035] Figure 11 yes Figure 9 A side view of the hydraulic cylinder from the left side;
[0036] Figure 12 It is viewed at a larger scale. Figure 1 A detailed side view of a vertical sand molding machine;
[0037] Figure 13 It is along Figure 12 A sectional view of line XIII-XIII;
[0038] Figure 14 It is viewed at a larger scale. Figure 13 Details;
[0039] Figure 15 It is viewed at a larger scale. Figure 14 Details;
[0040] Figure 16 It is along Figure 12 A cross-sectional view of line XVI-XVI;
[0041] Figure 17 It is viewed at a larger scale. Figure 16 Details;
[0042] Figure 18 It is along Figure 12A sectional view of line XVIII-XVIII. Detailed Implementation
[0043] In the following text, similar elements in different embodiments are generally indicated by the same reference numerals.
[0044] Figure 1 An embodiment of a vertical sand molding machine 1 for producing sand mold components according to the present invention is shown. The vertical sand molding machine 1 includes, as follows: Figure 6 The sand molding chamber 2 shown is composed of at least a top wall 3, a bottom wall 4, and two opposing side walls 5 and 6. According to the invention, at least one of the chamber walls 3, 4, 5, and 6 is provided with at least one sand filling port 7 communicating with the sand feeding system 8. In the illustrated embodiment, the top wall 3 is provided with the sand filling port 7, which has a sand funnel 63 forming part of the sand feeding system 8.
[0045] In a manner known per se, the pressure plate 9 and the opposing swing plate 10 can be displaced in the longitudinal direction L of the sand molding chamber 2 to compact the sand fed into the chamber. The pressure plate 9 is displaceable by a central hydraulic cylinder 11, and the swing plate 10 is displaceable by two lateral hydraulic cylinders 12 and 13 respectively arranged on two opposing chamber sidewalls 5 and 6. The piston rods 14 and 15 of the lateral hydraulic cylinders 12 and 13 are arranged to move a rear yoke 16 located at the rear end 17 of the sand molding chamber 2, and the rear yoke 16 is connected by means of connecting rods 18 and 19 and connecting rods 60 and 61 to a front yoke 20 located at the front end 21 of the sand molding chamber 2. Figure 8 As shown, piston rods 14 and 15 themselves also form internal hydraulic cylinders for the relatively smaller piston rods arranged inside the lateral hydraulic cylinders 12 and 13, and form a delivery piston in a manner known per se, for providing relatively rapid displacement of the swing plate 10 without compacting the sand. The relatively larger piston rods 14 and 15 form relatively larger pistons within the lateral hydraulic cylinders 12 and 13, and function when the sand is compacted. The swing plate 10 is oscillatingly arranged in the front yoke 20 in a manner known per se to allow the sand mold components to exit the sand molding chamber 2 via the forward movement of the pressure plate 9. Left and right tie rods 18 and 19 are arranged in the upper part of the sand molding chamber and guided in the guide bearing 22 of the sand molding chamber 2. The guide bearing 22 is provided with corresponding tie rod guide bushings 64 in which the tie rods 18 and 19 are arranged, as explained in further detail below. In addition, the left connecting rod 60 and the right connecting rod 61 are arranged in the lower part of the sand molding chamber and form a pair of connecting rods that are not guided in the guide bearing.
[0046] In an alternative embodiment (not shown), the upper left connecting rod 18 and the upper right connecting rod 19, as well as the lower left connecting rod 60 and the lower right connecting rod 61 (in the form of connecting rods), are arranged to be guided in guide bearings 22 of the sand molding chamber 2. In this embodiment, each connecting rod may be guided in only one guide bearing 22.
[0047] The front end 23 of each piston rod 14, 15 of the lateral hydraulic cylinders 12, 13 is fixedly connected to the rear yoke 16. This connection is preferably achieved by means of bolts inserted through the rear yoke 16 and screwed into the front end 23 of the piston rod 14, 15. Preferably, a thin disc is arranged between the front end 23 of the piston rod 14, 15 and the rear yoke 16. Thus, any inaccuracies in the position of the corresponding front end 23 of the fully extended piston rod 14, 15 can be accommodated by correspondingly machining the thickness of the disc to the position of the rear yoke 16. The front end 24 of each lateral hydraulic cylinder 12, 13 is fixedly connected to the corresponding chamber sidewall 5, 6 at the rear end 17 of the sand molding chamber 2, and the rear end 25 of each lateral hydraulic cylinder 12, 13 is displaceably connected to the corresponding chamber sidewall 5, 6 in the longitudinal direction L of the sand molding chamber 2 at the front end 21 of the sand molding chamber 2. By this fixed connection, it is understood that rotation or displacement between the connected elements is practically impossible. The fact that the rear end 25 of each lateral hydraulic cylinder 12, 13 is displaceably connected to the corresponding chamber sidewall 5, 6 in the longitudinal direction L of the sand molding chamber 2 means that at least a limited displacement of the rear end 25 relative to the chamber sidewall 5, 6 is possible, as will be understood from the following further description.
[0048] Thus, because the front end 24 of each lateral hydraulic cylinder 12, 13 is fixedly connected to the corresponding chamber sidewall 5, 6 at the rear end 17 of the sand molding chamber 2, any torque generated in the joint between the lateral hydraulic cylinder and the corresponding chamber sidewall due to the distance between the centerline of the lateral hydraulic cylinder and the corresponding chamber sidewall can only affect the corresponding chamber sidewall 5, 6 at the rear end 17 of the sand molding chamber 2, whereas compaction of the sand mold component typically occurs at a distance from the rear end 17 of the sand molding chamber 2 and relatively closer to the front end 21 of the sand molding chamber 2. Furthermore, because the rear end 25 of each lateral hydraulic cylinder 12, 13 is displaceably connected to the corresponding chamber sidewall 5, 6 at the front end 21 of the sand molding chamber 2 in the longitudinal direction L, any longitudinal expansion of the lateral hydraulic cylinders 12, 13 due to temperature changes or due to workload can be absorbed by the displaceable connection, and therefore will not cause any deformation of the corresponding chamber sidewall. Therefore, inappropriate deviations from the desired form of the produced sand mold component can be avoided. Furthermore, since the piston rods 14 and 15 of the lateral hydraulic cylinders 12 and 13 are also fixedly connected to the rear yoke 16, the vertical sand molding machine 1 according to the present invention can handle even very large compaction pressures.
[0049] In the illustrated embodiment, the pressure plate 9 and the swing plate 10 are adapted to compact the sand fed into the sand molding chamber 2 in the pressing zone 26 of the sand molding chamber, wherein the rear zone 27 of the sand molding chamber 2, which is not suitable for compacting sand, is arranged behind the pressing zone 26 in the sand molding chamber 2, as shown. Figure 6 , Figure 8 , Figure 13 and Figure 16 As shown. (From...) Figure 13 and Figure 16 As understood, the pressing zone 26 is provided with wear-resistant plates 67, making it suitable for compacting sand, while the rear zone 27 of the sand molding chamber 2 is not provided with wear-resistant plates and is therefore unsuitable for compacting sand. In the pressing zone 26, the top wall 3, the bottom wall 4, and the two opposing side walls 5, 6 are provided with wear-resistant plates 67. The front end 24 of each lateral hydraulic cylinder 12, 13 is fixedly connected to the corresponding side wall 5, 6 in the rear zone 27 of the sand molding chamber 2, and the rear end 25 of each lateral hydraulic cylinder 12, 13 is connected to the corresponding side wall 5, 6 in the pressing zone 26 of the sand molding chamber 2. Therefore, it can be ensured, even better, that inappropriate deviations from the desired form of the produced sand mold component can be avoided.
[0050] In the illustrated embodiment, as Figure 13 As is clearly visible, the front end 24 of each lateral hydraulic cylinder 12, 13 has a front end block 28 that directly abuts against the corresponding chamber sidewall 5, 6. Therefore, by precisely machining the contact surfaces of the chamber sidewalls 5, 6 where the front end block 28 abuts, the alignment tolerance between the lateral hydraulic cylinders 12, 13 and the longitudinal direction L of the sand molding chamber 2 can be reduced, thereby improving the performance of the vertical sand molding machine 1. Preferably, the contact surfaces of the chamber sidewalls 5, 6 are already... Figure 6 In one machining operation, the main chamber element 68 shown is machined together with the contact surface for the wear plate 67 and the contact surface 69 for the connecting rod guide bushing 64, thereby enabling high precision in the alignment between the lateral hydraulic cylinders 12, 13 and the contact surfaces for the wear plate 67 and the connecting rod guide bushing 64.
[0051] In the illustrated embodiment, the front end block 28 directly abuts against the first side surface 29 of the corresponding chamber sidewall, wherein the first side surface 29 is parallel to the overall plane of the corresponding chamber sidewall 5, 6, and the front end block 28 directly abuts against the end face 30 of the corresponding chamber sidewall 5, 6. The overall plane of each corresponding chamber sidewall 5, 6 is a vertical plane extending in the longitudinal direction L of the sand molding chamber 2. The end face 30 extends in a direction perpendicular to the overall plane of the corresponding chamber sidewall 5, 6. Therefore, by precisely machining the first side surface 29 and end face 30 of the chamber sidewall 5, 6, the alignment tolerance between the lateral hydraulic cylinders 12, 13 and the longitudinal direction L of the sand molding chamber 2 can be reduced even better, thereby improving the performance of the vertical sand molding machine 1.
[0052] During the assembly of the sand molding machine 1, alignment adjustment between the lateral hydraulic cylinders 12, 13 and the longitudinal direction L of the sand molding chamber 2 is not necessary. Therefore, the front end block 28 can directly abut against the first side 29 of the corresponding chamber sidewalls 5, 6 without any intermediate parts, such as shims or any other adjustment devices. Similarly, the front end block 28 can directly abut against the end face 30 of the corresponding chamber sidewalls 5, 6 without any intermediate parts, such as shims or any other adjustment devices.
[0053] Preferably, the first side surface 29 and end face 30 of the chamber sidewalls 5 and 6 have already been... Figure 6 In one machining operation, the main chamber element 68 shown is machined together with the contact surface for the wear-resistant plate 67 and the contact surface 69 for the connecting rod guide bushing 64, thereby achieving high precision in the alignment between the lateral hydraulic cylinders 12, 13 and the contact surfaces 69 for the wear-resistant plate 67 and the connecting rod guide bushing 64. Therefore, the lateral hydraulic cylinders 12, 13 can be arranged on the outside of the sand molding chamber 2 without even adjusting the position of the lateral hydraulic cylinders on the outside of the sand molding chamber 2. This results in high precision and good production economy.
[0054] At least the top wall 3, the bottom wall 4, and two opposing side walls 5 and 6 together form the main chamber element 68, which is preferably made of a single metal casting. Therefore, the prior art steps of individually machining each chamber wall to form contact surfaces for contacting adjacent chamber walls, and connecting individual wall portions to form a unit by means of pin fasteners, can be eliminated.
[0055] In the illustrated embodiment, as in Figure 5 , Figure 13 and Figure 16 As is particularly evident, the front end block 28 is clamped against the first side surface 29 by means of at least one bolt 31, and the front end block 28 is clamped against the end face 30 by means of at least one bolt 35, 36. Thus, a secure connection can be provided to ensure that the front end 24 of each lateral hydraulic cylinder 12, 13 is fixedly connected to the corresponding chamber sidewall 5, 6 at the rear end 17 of the sand molding chamber 2.
[0056] As in Figure 5 , Figure 13 and Figure 16As further seen in the illustrated embodiment, the front end block 28 is clamped against the end faces 30 of the respective chamber sidewalls 5, 6 by means of individual end supports 33 abutting against the end face 30 and gripping the end face 34 of the front end block. The individual end supports 33 are clamped against the end faces 30 of the respective chamber sidewalls 5, 6 by means of at least one bolt 35, and the individual end supports 33 are clamped against the end face 34 of the front end block 28 by means of at least one bolt 36. Thus, an even more robust connection can be provided to ensure that the front end 24 of each lateral hydraulic cylinder 12, 13 is fixedly connected to the respective chamber sidewalls 5, 6 at the rear end 17 of the sand molding chamber 2. Preferably, the individual end supports 33 are also clamped against the side 70 of the front end block 28 by means of at least one side bolt 32.
[0057] In an alternative embodiment (not shown), the front end 24 of each lateral hydraulic cylinder 12, 13 is fixedly connected to the corresponding chamber sidewall 5, 6 via the rear chamber wall 58. Figure 1 , Figure 4 and Figure 6 As shown, the rear wall 58 of the chamber is mounted on the rear end 17 of the sand molding chamber 2 by means of bolts 65. The central cylinder 11 is installed in the through hole 73 at the center of the rear wall 58.
[0058] In the illustrated embodiment, as Figure 12 , Figure 13 and Figure 14 As is clearly visible, the rear end 25 of each lateral hydraulic cylinder 12, 13 has a rear end block 39, which is arranged to directly abut against the corresponding chamber sidewall 5, 6. Therefore, by precisely machining the contact surface of the chamber sidewall 5, 6 abutted by the rear end block 39, the alignment tolerance between the lateral hydraulic cylinders 12, 13 and the longitudinal direction L of the sand molding chamber 2 can be reduced, thereby improving the performance of the vertical sand molding machine 1.
[0059] like Figure 13 and Figure 14 As shown, the inner contact surface 40 of the rear end block 39 is arranged to directly abut against the second side surface 41 of the corresponding chamber sidewall 5, 6, and the second side surface 41 is parallel to the overall plane of the corresponding chamber sidewall 5, 6.
[0060] During the assembly of the sand molding machine 1, the alignment adjustment between the lateral hydraulic cylinders 12, 13 and the longitudinal direction L of the sand molding chamber 2 is not necessary. Therefore, the rear end block 39 can directly abut against the second side 41 of the corresponding chamber sidewalls 5, 6 without any intermediate parts, such as gaskets or any other devices for adjustment.
[0061] like Figure 14 and Figure 15As further shown, in the illustrated embodiment, the rear end block 39 is held in a position between the retaining surface 42 of the fastening device 43 and the second side surface 41 of the corresponding chamber sidewall 5, 6, and the retaining surface 42 of the fastening device 43 is arranged to abut against the outer contact surface 44 of the rear end block 39. The distance D1 between the retaining surface 42 of the fastening device 43 and the second side surface 41 of the corresponding chamber sidewall 5, 6 is 1 / 10 mm to 1 mm larger than the distance D2 between the outer contact surface 44 and the inner contact surface 40 of the rear end block 39. Therefore, the inner contact surface 40 of the rear end block 39 can remain loosely abutting against the second side surface 41 of the corresponding chamber sidewalls 5, 6, thereby facilitating proper alignment between the lateral hydraulic cylinders 12, 13 and the longitudinal direction L of the sand molding chamber 2, and simultaneously ensuring that the rear end 25 of each lateral hydraulic cylinder 12, 13 is displaceably connected to the corresponding chamber sidewall 5, 6 in the longitudinal direction L of the sand molding chamber 2, thereby allowing any longitudinal expansion of the lateral hydraulic cylinders 12, 13 due to temperature changes or due to workload.
[0062] Note that, for illustrative purposes, the difference between distances D1 and D2, i.e., the space between the retaining surface 42 of the fastening device 43 and the outer contact surface 44 of the rear end block 39, is... Figure 14 and Figure 15 The claim is exaggerated.
[0063] Preferably, the distance between the retaining surface 42 of the fastening device 43 and the second side surface 41 of the corresponding chamber sidewalls 5, 6 is 2 / 10 mm to 7 / 10 mm larger than the distance between the outer contact surface 44 and the inner contact surface 40 of the rear end block 39. This allows for even better alignment between the lateral hydraulic cylinders 12, 13 and the longitudinal direction L of the sand molding chamber 2.
[0064] like Figure 14 and Figure 15 As further shown, in the illustrated embodiment, the fastening device 43 includes a bolt 45 that extends through a fastening hole 46 in the rear end block 39 and is screwed into the corresponding chamber sidewalls 5, 6.
[0065] like Figure 14 and Figure 15 As further shown, in the illustrated embodiment, the fastening device 43 includes a spacer tube 47 disposed in a fastening hole 46, the first end 48 of which abuts against the corresponding chamber sidewalls 5, 6, a bolt 45 extending through the spacer tube 47, and the support surface 49 of the bolt 45 being fastened against the second end 50 of the spacer tube 47. Therefore, the correct positioning of the retaining surface 42 of the fastening device 43 in the longitudinal direction of the bolt 45 can be ensured by precisely machining the length of the spacer tube 47 and tightening the bolt 45 until the support surface 49 of the bolt 45 abuts against the outer end face 71 of the spacer tube 47 and until the inner end face 72 of the spacer tube 47 abuts against the corresponding chamber sidewall 5.
[0066] like Figure 15 As shown, according to this embodiment, the inner diameter IDB of the fastening hole 46 is greater than the outer diameter ODST of the spacer tube 47. Therefore, it is possible to ensure in a simple manner that the rear end 25 of each lateral hydraulic cylinder 12, 13 is displaceably connected to the corresponding chamber sidewall 5, 6 in the longitudinal direction L of the sand molding chamber 2.
[0067] As shown in the figure, the retaining surface 42 of the fastening device 43 can be formed by the collar 51 of the spacer tube 47.
[0068] Preferably, the inner diameter IDB of the bore is at least 1 / 2 mm larger than the outer diameter ODST of the spacer tube 47. This ensures sufficient displacement possibility for the rear end 25 of each lateral hydraulic cylinder 12, 13 relative to the corresponding chamber sidewall 5, 6.
[0069] In the illustrated embodiment, as Figure 11 As shown, the rear end block 39 is provided with a rear oblong hole 52, which has a centerline C extending in the longitudinal direction L of the sand molding chamber 2 and has a width W, and as shown... Figure 16 As shown, the corresponding chamber sidewall 5 is provided with a rear guide pin 53 arranged in a rear elongated hole 52. (Refer to the diagram showing the rear guide pin 53.) Figure 17 The outer diameter OD of the rear guide pin 53 is not less than the width W of the rear oblong hole 52 minus 1 / 5 mm. However, preferably, the outer diameter OD of the rear guide pin 53 is not less than the width W of the rear oblong hole 52 minus 3 / 10 mm. Even more preferably, the outer diameter OD of the rear guide pin 53 is not less than the width W of the rear oblong hole 52 minus 2 / 10 mm. Therefore, in a simple manner, the correct vertical positioning of the rear end block 39 on the corresponding chamber sidewall 5 can be achieved without compromising the possibility of displacement of the rear end 25 of each lateral hydraulic cylinder 12, 13 relative to the corresponding chamber sidewall 5 in the longitudinal direction L of the sand molding chamber 2. As a result, the alignment tolerance between the lateral hydraulic cylinders 12, 13 and the longitudinal direction L of the sand molding chamber 2 can be reduced.
[0070] The length of the rear oblong hole 52 should be at least as long as the outer diameter OD of the rear guide pin 53, corresponding to the required displacement of the rear end 25 of each lateral hydraulic cylinder 12, 13 relative to the corresponding chamber sidewall 5.
[0071] like Figure 17 As shown, the rear guide pin 53 may be in the form of a pin extending from a hole in the chamber sidewall 5 and secured by means of a bolt 62. Preferably, the outer end of the rear guide pin 53 is beveled to facilitate the mounting of the lateral hydraulic cylinders 12, 13 onto the sand molding chamber 2.
[0072] Alternatively, the corresponding chamber sidewalls 5 and 6 may be provided with a rear elongated oval hole 52, and the rear end block 39 may be provided with a rear guide pin 53 arranged in the rear elongated oval hole 52.
[0073] In a similar manner to the above, in the illustrated embodiments, as Figure 11 As shown, the front end block 28 is provided with a front elongated oval hole 37, which has a centerline C extending in the longitudinal direction L of the sand molding chamber 2 and has a width W, and as shown... Figure 16 As shown, the corresponding chamber sidewall 5 is provided with a front guide pin 38 arranged in the front oblong hole 37. The outer diameter OD of the front guide pin 38 is not less than the width W of the front oblong hole 37 minus 1 / 5 mm. However, preferably, the outer diameter OD of the front guide pin 38 is not less than the width W of the front oblong hole 37 minus 3 / 10 mm. Even more preferably, the outer diameter OD of the front guide pin 38 is not less than the width W of the front oblong hole 37 minus 2 / 10 mm. Therefore, during the assembly of the vertical sand molding machine 1, the correct vertical positioning of the front end block 28 on the corresponding chamber sidewall 5 can be achieved without a complicated adjustment process. As a result, the alignment tolerance between the lateral hydraulic cylinders 12, 13 and the longitudinal direction L of the sand molding chamber 2 can be reduced.
[0074] Alternatively, the corresponding chamber sidewalls 5 and 6 may be provided with a front elongated oval hole 37, and the front end block 28 may be provided with a front guide pin 38 arranged in the front elongated oval hole 37.
[0075] In example Figure 13 In the illustrated embodiment, the front end 24 of each lateral hydraulic cylinder 12, 13 has a front end block 28 that directly abuts against the corresponding chamber sidewall 5, 6, and the rear end 25 of each lateral hydraulic cylinder 12, 13 has a rear end block 39 that is arranged to directly abut against the corresponding chamber sidewall 5, 6. The front end block 28 and the rear end block 39 of each lateral hydraulic cylinder 12, 13 are fastened against the opposite ends 54, 55 of the corresponding cylinder barrel 56 of the corresponding lateral hydraulic cylinder 12, 13 by means of a plurality of struts 57 extending between the front end block 28 and the rear end block 39.
[0076] List of reference numerals
[0077] C. Centerline of the oblong hole
[0078] D1 Distance between the retaining surface of the fastening device and the second side surface of the chamber sidewall
[0079] The distance between the outer contact surface and the inner contact surface of the D2 rear end block.
[0080] L-shaped sand molding room longitudinal direction
[0081] Outer diameter of OD guide pin
[0082] Inner diameter of IDB fastening hole
[0083] ODST spacer tube outer diameter
[0084] W is the width of the oblong hole.
[0085] 1 Vertical Sand Molding Machine
[0086] 2 Sand Molding Studio
[0087] 3. Ceiling wall
[0088] 4. Floor wall
[0089] 5. Left ventricular lateral wall
[0090] 6. Right ventricular lateral wall
[0091] 7. Sand filling port
[0092] 8. Sand Feeding System
[0093] 9 pressure plates
[0094] 10. Arrangement board
[0095] 11. Central hydraulic cylinder
[0096] 12 Left-side hydraulic cylinder
[0097] 13 Right-side hydraulic cylinder
[0098] 14. Left piston rod
[0099] 15 Right piston rod
[0100] 16. Back yoke
[0101] 17. The rear of the sand modeling room
[0102] 18. Left tie rod
[0103] 19 Right tie rod
[0104] 20. Preyoke
[0105] 21. Front end of the sand modeling room
[0106] 22 Guide bearing
[0107] 23. The front end of the lateral piston rod
[0108] 24. Front end of the lateral hydraulic cylinder
[0109] 25. Rear end of the lateral hydraulic cylinder
[0110] 26. Pressing area of the sand molding room
[0111] 27. Rear area of the sand modeling room
[0112] 28. Front end block of the lateral hydraulic cylinder
[0113] The first side of the side wall of chamber 29
[0114] End face of the side wall of chamber 30
[0115] 31 Bolts for the front end block
[0116] 32 Side bolts for individual end brackets
[0117] 33 Individual end supports
[0118] 34. End face of the front block
[0119] 35 Bolts for the end faces of the chamber sidewalls
[0120] 36 Bolts for the end face of the front end block
[0121] 37. Front oblong hole
[0122] 38 Front guide pins
[0123] 39. Rear end block of the lateral hydraulic cylinder
[0124] 40. Inner contact surface of the rear end block
[0125] 41. The second side of the side wall of chamber 41
[0126] 42. Retaining surface of the fastening device
[0127] 43 Fastening device
[0128] 44. Outer contact surface of the back-end block
[0129] 45 Bolts extending through the holes in the rear end block
[0130] 46 Fastening holes of the rear end block
[0131] 47. Spacing tube of fastening device
[0132] 48. First end of the spacer tube
[0133] 49 Bolt support surface
[0134] The second end of the 50-gauge tube
[0135] 51. Coupling of the spacer tube
[0136] 52. Rear oblong hole
[0137] 53 Post-guide pin
[0138] 54. Front end of cylinder barrel
[0139] 55 Cylinder Rear End
[0140] 56. Cylinder barrel of lateral hydraulic cylinder
[0141] 57. Support rod of the lateral hydraulic cylinder
[0142] Rear wall of Room 58
[0143] 59. Center piston rod
[0144] 60 Left connecting rod
[0145] 61 Right connecting rod
[0146] 62 Bolts holding the guide pin
[0147] 63 Sand Funnel
[0148] 64 Series Connecting Rod Guide Bushing
[0149] 65 Bolts for the rear wall of the chamber
[0150] 66. Swing plate mechanism
[0151] 67. Wear-resistant plate for sand molding room
[0152] 68 Main chamber components
[0153] 69 Contact surface for connecting rod guide bushing
[0154] 70 Side of the front block
[0155] 71. Outer end face of the spacer tube
[0156] 72. Inner end face of the spacer tube
[0157] 73. Through hole in the rear wall of chamber 73
Claims
1. A vertical sand molding machine (1) for producing sand mold components, the vertical sand molding machine (1) comprising a sand molding chamber (2), the sand molding chamber (2) comprising at least a top wall (3), a bottom wall (4), and two opposing side walls (5, 6), wherein at least one of the chamber walls (3, 4, 5, 6) is provided with at least one sand filling port (7) communicating with a sand feeding system (8), wherein a pressure plate (9) and opposing swing plates (10) are movable in the longitudinal direction (L) of the sand molding chamber (2) to compact the sand fed into the sand molding chamber, wherein the pressure plate (9) is movable by a central hydraulic cylinder (11), and wherein the swing plates (10) are movable by means of a central hydraulic cylinder (11), wherein the swing plates (10) are respectively arranged on the two opposing side walls (5, 6). Two lateral hydraulic cylinders (12, 13) are displaced, wherein the piston rods (14, 15) of the lateral hydraulic cylinders (12, 13) are arranged to move a rear yoke (16) disposed at the rear end (17) of the sand molding chamber (2), wherein the rear yoke (16) is connected by means of connecting rods (18, 19) to a front yoke (20) disposed at the front end (21) of the sand molding chamber (2), wherein the swing plate (10) is arranged to be able to swing in the front yoke (20) so as to allow the sand mold component to leave the sand molding chamber (2) by means of the forward movement of the pressure plate (9), and wherein at least some of the connecting rods (18, 19) are guided in a guide bearing (22) of the sand molding chamber (2), characterized in that, The front end (23) of each piston rod (14, 15) of the lateral hydraulic cylinders (12, 13) is fixedly connected to the rear yoke (16), the front end (24) of each lateral hydraulic cylinder (12, 13) is fixedly connected to the corresponding chamber sidewall (5, 6) at the rear end (17) of the sand molding chamber (2), and the rear end (25) of each lateral hydraulic cylinder (12, 13) is displaceably connected in the longitudinal direction (L) of the sand molding chamber (2) to the corresponding chamber sidewall (5, 6) at the front end (21) of the sand molding chamber (2).
2. The vertical sand molding machine according to claim 1, wherein the pressure plate (9) and the swing plate (10) are adapted to compact the sand fed into the sand molding chamber (2) in the pressing zone (26) of the sand molding chamber, wherein the rear zone (27) of the sand molding chamber (2) which is not suitable for compacting sand is arranged behind the pressing zone (26) of the sand molding chamber (2), wherein the front end (24) of each lateral hydraulic cylinder (12, 13) is fixedly connected to the corresponding chamber sidewall (5, 6) in the rear zone (27) of the sand molding chamber (2), and wherein the rear end (25) of each lateral hydraulic cylinder (12, 13) is connected to the corresponding chamber sidewall (5, 6) in the pressing zone (26) of the sand molding chamber (2).
3. The vertical sand molding machine according to claim 1 or 2, wherein the front end (24) of each lateral hydraulic cylinder (12, 13) has a front end block (28) that directly abuts against the corresponding chamber sidewall (5, 6).
4. The vertical sand molding machine according to claim 3, wherein the front end block (28) directly abuts against the first side surface (29) of the corresponding chamber sidewall, wherein the first side surface (29) is parallel to the overall plane of the corresponding chamber sidewall (5, 6), wherein the front end block (28) directly abuts against the end face (30) of the corresponding chamber sidewall (5, 6), and wherein the end face (30) extends in a direction perpendicular to the overall plane of the corresponding chamber sidewall (5, 6).
5. The vertical sand molding machine according to claim 4, wherein the front end block (28) is clamped against the first side surface (29) by means of at least one bolt (31), and wherein the front end block (28) is clamped against the end face (30) by means of at least one bolt (35, 36).
6. The vertical sand molding machine according to claim 4 or 5, wherein the front end block (28) is clamped against the end face (30) of the respective chamber sidewall (5, 6) by means of a separate end bracket (33) abutting against the end face (30) and gripping the end face (34) of the front end block, wherein the separate end bracket (33) is clamped against the end face (30) of the respective chamber sidewall (5, 6) by means of at least one bolt (35), and wherein the separate end bracket (33) is clamped against the end face (34) of the front end block (28) by means of at least one bolt (36).
7. The vertical sand molding machine according to claim 3, wherein one of the front end block (28) or the corresponding chamber sidewall (5, 6) is provided with a front oblong hole (37), the front oblong hole having a centerline (C) extending in the longitudinal direction (L) of the sand molding chamber (2) and having a width (W) extending in the vertical direction, wherein the other of the front end block (28) or the corresponding chamber sidewall (5, 6) is provided with a front guide pin (38) arranged in the front oblong hole (37), and wherein the outer diameter (OD) of the front guide pin (38) is not less than the width (W) of the front oblong hole (37) minus 1 / 5 mm.
8. The vertical sand molding machine according to claim 1, wherein the rear end (25) of each lateral hydraulic cylinder (12, 13) has the form of a rear end block (39) arranged to directly abut against the corresponding chamber sidewall (5, 6).
9. The vertical sand molding machine according to claim 8, wherein the inner contact surface (40) of the rear end block (39) is arranged to directly abut against the second side surface (41) of the corresponding chamber sidewall (5, 6), and wherein the second side surface (41) is parallel to the overall plane of the corresponding chamber sidewall (5, 6).
10. The vertical sand molding machine according to claim 9, wherein the rear end block (39) is held between the holding surface (42) of the fastening device (43) and the second side surface (41) of the corresponding chamber sidewall (5, 6), wherein the holding surface (42) of the fastening device (43) is arranged to abut against the outer contact surface (44) of the rear end block (39), and wherein the distance (D1) between the holding surface (42) of the fastening device (43) and the second side surface (41) of the corresponding chamber sidewall (5, 6) is 1 / 10 mm to 1 mm larger than the distance (D2) between the outer contact surface (44) of the rear end block (39) and the inner contact surface (40) of the rear end block (39).
11. The vertical sand molding machine according to claim 10, wherein the distance between the retaining surface (42) of the fastening device (43) and the second side surface (41) of the corresponding chamber sidewall (5, 6) is 2 / 10 mm to 7 / 10 mm greater than the distance between the outer contact surface (44) of the rear end block (39) and the inner contact surface (40) of the rear end block (39).
12. The vertical sand molding machine according to claim 10, wherein the fastening device (43) comprises a bolt (45) extending through a fastening hole (46) in the rear end block (39) and screwed into the corresponding chamber sidewall (5, 6).
13. The vertical sand molding machine according to claim 12, wherein the fastening device (43) includes a spacer tube (47) arranged in the fastening hole (46), a first end (48) of the spacer tube (47) abutting against a corresponding chamber sidewall (5, 6), wherein a bolt (45) extends through the spacer tube (47), wherein a support surface (49) of the bolt (45) is fastened against a second end (50) of the spacer tube (47), and wherein the inner diameter (IDB) of the fastening hole (46) is greater than the outer diameter (ODST) of the spacer tube (47).
14. The vertical sand molding machine according to claim 13, wherein the retaining surface (42) of the fastening device (43) is formed by the collar (51) of the spacer tube (47).
15. The vertical sand molding machine according to claim 13, wherein the inner diameter (IDB) of the hole is at least 1 / 2 mm larger than the outer diameter (ODST) of the spacer tube (47).
16. The vertical sand molding machine according to any one of claims 8 to 15, wherein one of the rear end block (39) or the corresponding chamber sidewall (5, 6) is provided with a rear oblong hole (52), the rear oblong hole having a centerline (C) extending in the longitudinal direction (L) of the sand molding chamber (2) and having a width (W), wherein the other of the rear end block (39) or the corresponding chamber sidewall (5, 6) is provided with a rear guide pin (53) arranged in the rear oblong hole (52), and wherein the outer diameter (OD) of the rear guide pin (53) is not less than the width (W) of the rear oblong hole (52) minus 1 / 5 mm.
17. The vertical sand molding machine according to claim 1, wherein the front end (24) of each lateral hydraulic cylinder (12, 13) is in the form of a front end block (28) directly abutting against the corresponding chamber sidewall (5, 6), wherein the rear end (25) of each lateral hydraulic cylinder (12, 13) is in the form of a rear end block (39) arranged to directly abut against the corresponding chamber sidewall (5, 6), and wherein the front end block (28) and the rear end block (39) of each lateral hydraulic cylinder (12, 13) are fastened against the opposite ends (54, 55) of the corresponding cylinder barrel (56) of the corresponding lateral hydraulic cylinder (12, 13) by means of a plurality of struts (57) extending between the front end block (28) and the rear end block (39).