Demoulding unit for machine tool body casting mould

Abstract

The utility model discloses a demoulding unit for a machine tool body casting mould, which relates to the technical field of mould demoulding, aims to solve the technical problem that the quality of a casting is influenced by the current hydraulic demoulding mode, and comprises a working table, a rotating mechanism arranged on the working table and a demoulding mechanism arranged on the rotating mechanism, limiting rods are symmetrically mounted at the upper end of the workbench, the rotating mechanism comprises mounting plates symmetrically mounted on the workbench, a first rotating shaft and a second rotating shaft are symmetrically and rotationally mounted between the mounting plates, the demolding mechanism comprises a demolding box and a bearing box, and a telescopic rod is mounted at the side end of the demolding box. The hydraulic demolding device has the advantages that the sand box is vibrated during hydraulic demolding to damage adhesion structures between molding sand and the inner wall of the sand box and between the molding sand and a casting, and the molding sand at each part of the sand mold is synchronously loosened under vibration, so that the demolding operation is easier, the risk that the sand mold is damaged and the casting is damaged due to powerful demolding is reduced, and the demolding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of mold demolding technology, and more specifically, to a demolding unit for casting molds for machine tool beds. Background Technology

[0002] The casting of machine tool beds primarily utilizes sand boxes, which are generally made of cast iron or cast steel and possess a certain degree of rigidity and strength. They are typically square or rectangular and come in various sizes. The function of the sand box is to compact and fix the molding sand during casting, forming the cavity for the desired casting. During the molding process, the pattern is placed inside the sand box, and through operations such as filling and compacting sand, the molding sand is shaped precisely around the pattern. The pattern is then removed, resulting in the cavity used for pouring molten metal. Sand boxes are reusable, significantly reducing casting costs and improving production efficiency.

[0003] For large components like machine tool beds, hydraulic demolding is primarily used for demolding. This method utilizes the powerful thrust generated by the hydraulic system to separate the sand box from the sand mold and the casting. However, the adhesion and friction between the molding sand and the inner wall of the sand box, as well as between the sand and the casting, are still relatively large. Excessive adhesion and friction can cause uneven stress on the sand mold during demolding, easily leading to localized damage and sand loss. These sand particles may embed into the casting surface, forming casting defects such as sand holes and porosity, affecting the casting quality. Therefore, we propose a demolding unit for machine tool bed casting molds. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a demolding unit for casting molds of machine tool beds, so as to solve the technical problem that the current hydraulic demolding method affects the quality of castings.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a demolding unit for casting a machine tool bed, comprising a worktable, a rotating mechanism mounted on the worktable, and a demolding mechanism mounted on the rotating mechanism. Limiting rods are symmetrically mounted on the upper end of the worktable. The rotating mechanism includes mounting plates symmetrically mounted on the worktable. A first rotating shaft and a second rotating shaft are symmetrically rotatably mounted between the mounting plates. The demolding mechanism includes a demolding box and a receiving box. A telescopic rod is mounted on the side end of the demolding box, and the end of the telescopic rod is connected to the first rotating shaft. A connecting rod is provided on the side end of the receiving box, and the end of the connecting rod is connected to the second rotating shaft.

[0006] Preferably, a driven gear and a driving gear are rotatably mounted on the mounting plate. The driven gear is connected to the axis of the second rotating shaft, and the driving gear is connected to the axis of the first rotating shaft. The driven gear and the driving gear are meshed together. A motor is provided on one side of the upper end face of the worktable, and the output shaft of the motor is connected to the axis of the driving gear.

[0007] Preferably, the limiting rod includes a first arc-shaped rod and a second arc-shaped rod, both of which are arc-shaped. The arc axis of the first arc-shaped rod coincides with the axis of the first rotating shaft, and the arc axis of the second arc-shaped rod coincides with the axis of the second rotating shaft.

[0008] Preferably, the first arc-shaped rod is provided with a plurality of curved portions, which are connected to each other. The curved portions are arc-shaped, and adjacent curved portions form an S-shape.

[0009] Preferably, the front and rear ends of the demolding box and the receiving box are provided with mounting bases, and the front end of the mounting base is rotatably mounted with a limit ring, which is sleeved on the limit rod.

[0010] Preferably, a first hydraulic device is arranged on the side of the demolding box, the hydraulic rod of the first hydraulic device extends into the demolding box and is installed with a fixing plate, and a second hydraulic device is arranged at the lower end of the demolding box, the hydraulic rod of the second hydraulic device extends into the demolding box and is installed with a demolding push plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model, through its structural design and the unique design of the curved part on the limiting rod, causes the demolding box to vibrate during rotation. This effectively disrupts the adhesion structure between the molding sand, the inner wall of the sand box, and the casting, causing slight displacement between the originally tightly bound molding sand particles. This reduces the adhesion and friction between them. Under vibration, the molding sand in various parts of the sand mold loosens synchronously, making their adhesion less noticeable. Vibration-assisted hydraulic demolding allows the sand mold to detach from the sand box more quickly under the dual action, making subsequent demolding operations easier and reducing the risk of sand mold breakage and casting damage caused by forceful demolding. After demolding, the molding sand in the sand mold is easier to remove from the casting surface, reducing the workload and difficulty of subsequent cleaning processes, improving cleaning efficiency, accelerating the production pace, meeting the needs of large-scale production, improving the overall production efficiency of machine tool bed casting, and solving the problem of current hydraulic demolding methods affecting casting quality.

[0013] 2. This utility model also features a receiving box structure. The receiving box can stably support the machine tool bed casting and molding sand, providing reliable support during demolding and transfer to prevent them from falling or being damaged by collision. Connected to the second rotating shaft via a connecting rod, the receiving box can precisely align with the demolding box to ensure smooth transfer of molding sand and castings. At the same time, the mounting base and limiting ring move along the limiting rod to ensure stability during the receiving process and reduce the impact of shaking on molding sand and castings. After receiving, it also facilitates subsequent processes such as cleaning and inspection of molding sand and castings by operators, effectively improving overall production efficiency and casting quality. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the present utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 3 This is a schematic diagram of the demolding mechanism of this utility model;

[0017] Figure 4 This is a front view structural diagram of the demolding box of this utility model;

[0018] Figure 5 This is a bottom view of the demolding box structure of this utility model;

[0019] Figure 6 This is a schematic diagram of one usage state of the present invention.

[0020] The following are the labels in the diagram: 101, workbench; 102, limit rod; 103, first arc-shaped rod; 1031, bending part; 104, second arc-shaped rod; 200, rotating mechanism; 201, mounting plate; 202, first rotating shaft; 203, second rotating shaft; 204, driven gear; 205, driving gear; 206, motor; 300, demolding mechanism; 301, demolding box; 302, telescopic rod; 303, first hydraulic device; 304, fixing plate; 305, second hydraulic device; 306, demolding push plate; 307, receiving box; 308, mounting base; 309, limit ring; 310, connecting rod. Detailed Implementation

[0021] like Figures 1 to 6As shown, this utility model relates to a demolding unit for casting molds of machine tool beds, including a worktable 101, a rotating mechanism 200 mounted on the worktable 101, and a demolding mechanism 300 mounted on the rotating mechanism 200. Limiting rods 102 are symmetrically mounted on the upper end of the worktable 101. The rotating mechanism 200 includes mounting plates 201 symmetrically mounted on the worktable 101. A first rotating shaft 202 and a second rotating shaft 203 are symmetrically rotatably mounted between the mounting plates 201. The demolding mechanism 300 includes a demolding box 301 and a receiving box 307. A telescopic rod 302 is mounted on the side end of the demolding box 301. The end of the telescopic rod 302 is connected to the first rotating shaft 202. A connecting rod 310 is provided on the side end of the receiving box 307. The end of the connecting rod 310 is connected to the second rotating shaft 203. This invention uses hydraulic demolding to vibrate the sand box, disrupting the adhesion between the molding sand, the inner wall of the sand box, and the casting. This causes slight displacement between the originally tightly bound molding sand particles, reducing their adhesion and friction. Under vibration, the molding sand in various parts of the sand mold loosens synchronously, making the adhesion between them less pronounced. This makes subsequent demolding operations easier, reduces the risk of sand mold breakage and casting damage caused by forceful demolding, and improves demolding efficiency.

[0022] Specifically, a driven gear 204 and a driving gear 205 are rotatably mounted on the mounting plate 201. The driven gear 204 is connected to the axis of the second rotating shaft 203, and the driving gear 205 is connected to the axis of the first rotating shaft 202. The driven gear 204 and the driving gear 205 are meshed together. A motor 206 is provided on one side of the upper end face of the worktable 101, and the output shaft of the motor 206 is connected to the axis of the driving gear 205. When the motor 206 operates, it can rotate the driving gear 205, which in turn can drive the driven gear 204 to rotate. This causes the first rotating shaft 202 and the second rotating shaft 203 to rotate relative to each other, so that the demolding box 301 and the receiving box 307 can be connected to each other or moved away from each other.

[0023] Furthermore, the limiting rod 102 includes a first arc-shaped rod 103 and a second arc-shaped rod 104. Both the first arc-shaped rod 103 and the second arc-shaped rod 104 are arc-shaped. The arc axis of the first arc-shaped rod 103 coincides with the axis of the first rotating shaft 202, and the arc axis of the second arc-shaped rod 104 coincides with the axis of the second rotating shaft 203. The first arc-shaped rod 103 and the second arc-shaped rod 104 of the limiting rod 102 are respectively aligned with the axes of the first rotating shaft 202 and the second rotating shaft 203. When the first rotating shaft 202 and the second rotating shaft 203 rotate, the first arc-shaped rod 103 and the second arc-shaped rod 104 can respectively limit the demolding box 301 and the receiving box 307, ensuring the stability of their rotation.

[0024] It is worth noting that the first arc-shaped rod 103 is provided with a number of curved portions 1031, which are connected to each other and are arranged in an arc shape. Adjacent curved portions 1031 form an S-shape. The first arc-shaped rod 103 can limit the demolding box 301. Secondly, the interconnected curved part 1031 can finely adjust the demolding box 301. When the demolding box 301 rotates, it can vibrate, which can cause the sand box fixed inside the demolding box 301 to vibrate. The vibration can destroy the adhesion structure between the molding sand and the inner wall of the sand box and the casting, causing the originally tightly bonded molding sand particles to have slight displacement, thereby reducing the adhesion and friction between them. Under the vibration, the molding sand in each part of the sand mold is loosened synchronously, making the adhesion between them loose, making the subsequent demolding operation easier and reducing the risk of sand mold breakage and casting damage caused by strong demolding. After demolding, the molding sand in the sand mold is easier to remove from the surface of the casting, reducing the workload and difficulty of subsequent cleaning processes, improving cleaning efficiency, and saving time and labor costs for subsequent processing and treatment of the casting.

[0025] It is worth mentioning that both the front and rear ends of the demolding box 301 and the receiving box 307 are provided with mounting bases 308. A limit ring 309 is rotatably mounted on the front end of the mounting base 308, and the limit ring 309 is sleeved on the limit rod 102. The rotatably mounted limit ring 309 can automatically adapt and adjust its angle on the first arc-shaped rod 103 when the demolding box 301 rotates.

[0026] It is worth noting that a first hydraulic device 303 is arranged on the side of the demolding box 301. The hydraulic rod of the first hydraulic device 303 extends into the demolding box 301 and is fitted with a fixing plate 304. A second hydraulic device 305 is arranged at the lower end of the demolding box 301. The hydraulic rod of the second hydraulic device 305 extends into the demolding box 301 and is fitted with a demolding push plate 306. During demolding, the lower sand box is positioned inside the demolding box 301 by hoisting. The operation of the first hydraulic device 303 can clamp and fix the outer surface of the sand box with the fixing plate 304. After the demolding box 301 is connected to the receiving box 307, the operation of the second hydraulic device 305 can displace the demolding push plate 306. The demolding push plate 306 can push the sand mold and the casting into the receiving box 307, thereby completing the demolding work. Under the dual action of vibration and thrust, the sand mold can be released from the sand box more quickly, which speeds up the production rhythm, improves the production efficiency of machine tool bed casting, and helps to meet the needs of large-scale production.

[0027] Working Principle: This embodiment provides a demolding unit for casting molds of machine tool beds. In use, a lower sand box containing the casting and sand mold is placed into the demolding box 301 using a hoisting device. The first hydraulic device 303 is activated, and its hydraulic rod pushes the fixing plate 304 to extend, firmly clamping and fixing the outer surface of the sand box from the side, ensuring the sand box remains stable during subsequent operations. Then, the motor 206 on one side of the upper end face of the worktable 101 is activated. The output shaft of the motor 206 drives the drive gear 205 to rotate. Because the drive gear... 205 meshes with the driven gear 204, and the driving gear 205 is connected to the axis of the first rotating shaft 202, while the driven gear 204 is connected to the axis of the second rotating shaft 203. Therefore, when the driving gear 205 rotates, it will drive the driven gear 204 to rotate, which in turn causes the first rotating shaft 202 and the second rotating shaft 203 to rotate relative to each other. The first rotating shaft 202 drives the demolding box 301 to rotate through the telescopic rod 302, and the second rotating shaft 203 drives the receiving box 307 to rotate through the connecting rod 310. The two gradually connect with each other. During this process, the limiting rings 309, which are rotatably mounted on the front and rear mounting bases 308 of the demolding box 301 and the receiving box 307, move along the trajectory of the limiting rods 102 (the first arc-shaped rod 103 and the second arc-shaped rod 104). Since the curved parts 1031 on the first arc-shaped rod 103 are interconnected in an S-shape, the limiting rods 102 not only limit the demolding box 301 and the receiving box 307, but also continuously pull the demolding box 301 under the action of the limiting rings 309. During this period, the telescopic rods 302 will cooperate to extend and retract, thereby causing the demolding box 301 to vibrate when rotating, which is then transmitted to the sand box, destroying the adhesion structure between the molding sand and the inner wall of the sand box and the casting, reducing the adhesion and friction. After accurate docking with the receiving box 307, the second hydraulic device 305 is started. Its hydraulic rod pushes the demolding push plate 306 upward. The demolding push plate 306 pushes the sand mold and the casting, causing them to move from the demolding box 301 into the receiving box 307. Under the dual action of vibration and the pushing force of the demolding push plate 306, the sand mold is more quickly separated from the sand box, completing the demolding work. After demolding is completed, the motor 206 is started again, causing the first rotating shaft 202 and the second rotating shaft 203 to rotate in opposite directions, driving the demolding box 301 and the receiving box 307 away from each other to their initial positions. Then, the first hydraulic device 303 and the second hydraulic device 305 retract their hydraulic rods, and the fixing plate 304 and the demolding push plate 306 are reset, preparing for the next demolding operation.

[0028] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A demolding unit for a casting mold of a machine tool bed, characterized by, The utility model provides a mould stripping mechanism, including workbench (101) and the rotary mechanism (200) of workbench (101) and the demoulding mechanism (300) of rotary mechanism (200) and set up, the upper end of workbench (101) is installed limit rod (102) symmetrically, the rotary mechanism (200) includes the mounting plate (201) of symmetry installation on workbench (101), the first rotation axis (202) and the second rotation axis (203) are installed with symmetry rotation between mounting plate (201), the demoulding mechanism (300) includes demoulding box (301) and the receiving box (307), the side end of demoulding box (301) is installed with telescopic rod (302), the end of telescopic rod (302) is connected with the first rotation axis (202), the side end of receiving box (307) is provided with connecting rod (310), and the end of connecting rod (310) is connected with the second rotation axis (203).

2. The demolding unit for a casting mold of a machine tool bed according to claim 1, characterized by The mounting plate (201) is rotatably installed with a driven gear (204) and a driving gear (205), the driven gear (204) is connected with the axis of the second rotation axis (203), the driving gear (205) is connected with the axis of the first rotation axis (202), the driven gear (204) and the driving gear (205) are meshed and connected, and the upper end surface of the workbench (101) is provided with a motor (206) on one side, the output shaft of the motor (206) is connected with the axis of the driving gear (205).

3. The demolding unit for a casting mold of a machine tool bed according to claim 2, characterized by The limit rod (102) includes a first arc-shaped rod (103) and a second arc-shaped rod (104), the first arc-shaped rod (103) and the second arc-shaped rod (104) are both arranged in an arc shape, the arc axis of the first arc-shaped rod (103) is consistent with the axis of the first rotation axis (202), and the arc axis of the second arc-shaped rod (104) is consistent with the axis of the second rotation axis (203).

4. The demolding unit for a casting mold of a machine tool bed according to claim 3, characterized by The first arc-shaped rod (103) is provided with a plurality of curved portions (1031) arranged in a curved manner, the curved portions (1031) are connected with each other, the curved portions (1031) are arranged in an arc shape, and adjacent curved portions (1031) form an S shape.

5. The demolding unit for a casting mold of a machine tool bed according to claim 4, characterized in that, The front end and the rear end of the demoulding box (301) and the receiving box (307) are provided with mounting seats (308), the front end of the mounting seat (308) is rotatably installed with a limiting ring (309), and the limiting ring (309) is sleeved on the limiting rod (102).

6. The demolding unit for a casting mold of a machine tool bed according to claim 5, characterized by The side end of the demoulding box (301) is arrayed with a first hydraulic device (303), a hydraulic rod of the first hydraulic device (303) extends into the demoulding box (301) and is installed with a fixed plate (304), the lower end of the demoulding box (301) is provided with a second hydraulic device (305), a hydraulic rod of the second hydraulic device (305) extends into the demoulding box (301) and is installed with a demoulding push plate (306).

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