A device for automatically locking bottom mold and demoulding for gravity casting machine

Abstract

The utility model discloses an automatic bottom mold locking and demoulding device for a gravity casting machine, comprising a demoulding assembly and a locking assembly. The demoulding assembly is arranged at the lower part of the locking assembly, and the demoulding assembly comprises a hydraulic cylinder, a cylinder mounting plate, a guide column, a lower connecting plate and an upper connecting plate. The locking assembly comprises a locking frame, a transmission screw, a bottom mold clamping block, an active sprocket, a driven sprocket, a chain, a roller, a roller mounting frame, a motor mounting frame and a reduction motor. The utility model can automatically lock the bottom mold by setting the locking assembly, and can also automatically loosen the bottom mold when the product needs to be demoulded, so that the demoulding device can eject the product, which is safer and more efficient than the manual operation method. The demoulding device can eject the product from the mold. And the setting of the limit mechanism can realize the control of the working stroke of the hydraulic cylinder, so as to adapt to products of different specifications and improve the versatility of the device.

Description

Technical Field

[0001] The utility model relates to the field of gravity casting machines, in particular to the technical field of an automatic bottom mold locking and demoulding device for a gravity casting machine. Background Art

[0002] Gravity casting machine is an important casting equipment, which is mainly used to obtain castings by gravity casting metal molds. During the casting process, the metal liquid flows into the mold cavity under the action of the earth's gravity, fills the entire mold cavity, and forms a casting. Gravity casting machines are mainly divided into two types: tiltable and fixed. The tiltable gravity casting machine has the function of tilting casting. This design can effectively improve the intrinsic quality of the casting. It is particularly suitable for gravity casting of complex castings such as intake manifolds. The fixed gravity casting machine maintains a fixed position for casting operations.

[0003] In order to facilitate the removal of the finished product, gravity casting machines are generally equipped with a bottom mold to facilitate the subsequent ejection of the molded product. The traditional bottom mold installation is generally installed on the demoulding mechanism manually, and the bottom mold needs to be manually separated from the cast product after the casting is completed. This operation method is not only inefficient, but also because the temperature of the liquid metal used in casting is very high, the temperature of the bottom mold will also be very high, and it is easy to get burned when operating manually. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the utility model is that in the prior art, the bottom mold is generally installed on the demoulding mechanism manually, and the bottom mold needs to be separated from the cast product manually after casting. This operation method is not only inefficient, but also because the temperature of the liquid metal used in casting is very high, the temperature of the bottom mold is also very high, and it is easy to get burned when operating manually.

[0006] (II) Technical solution

[0007] In order to solve the above problems, the utility model provides the following technical solutions:

[0008] A device for automatically locking a bottom mold and demoulding a gravity casting machine, comprising a demoulding assembly and a mold locking assembly, wherein the demoulding assembly is arranged at the lower part of the mold locking assembly, and the demoulding assembly comprises a hydraulic oil cylinder, an oil cylinder mounting plate, a guide column, a lower connecting plate and an upper connecting plate, wherein the cylinder body of the hydraulic oil cylinder is fixedly connected to the oil cylinder mounting plate, the piston rod of the hydraulic oil cylinder is connected to the upper connecting plate, the oil cylinder mounting plate is fixedly connected to the lower connecting plate, the lower connecting plate is connected to a table surface for placing side molds in the outside world, the upper connecting plate is connected to the mold locking assembly, the top end of the guide column is fixedly connected to the lower end surface of the upper connecting plate, and the guide column is also connected to the oil cylinder mounting plate through a sliding sleeve;

[0009] The locking assembly comprises a locking frame, a transmission screw, a bottom mold clamping block, a driving sprocket, a driven sprocket, a chain, a roller, a roller mounting frame, a motor mounting frame and a reduction motor. The locking frame is fixedly arranged on the upper end surface of the upper connecting plate, one end of the transmission screw is connected to one side of the locking frame through a bearing, and the end close to the reduction motor is also connected to the locking frame through a bearing, and at the same time, it extends out of the outside of the locking frame and is fixedly connected to the driven sprocket, the rotating shaft of the reduction motor is connected to the driving sprocket, and the two ends of the roller are connected to the two sides of the roller mounting frame through bearings, the chain passes through the upper part of the roller and contacts the outer diameter surface of the roller, and is connected to the driving sprocket and the driven sprocket at the same time, and the roller mounting frame is fixedly connected to the table top of the side mold with the outside through a connecting block, and a group of symmetrically arranged screw nuts are provided on the transmission screw, and the bottom mold clamping block is also provided with a group of screw nuts respectively arranged on a group of screw nuts through screw nut seats.

[0010] Furthermore, the guide columns are provided in a group and are all connected to the cylinder mounting plate via a sliding sleeve.

[0011] Furthermore, a limiting mechanism is also provided on the demolding assembly, and the limiting mechanism includes a first limiting plate, a group of first photoelectric sensors, a connecting shaft and a detection block. The connecting shaft is arranged at the lower end of the guide column close to the side of the reduction motor, and the detection block is arranged on the connecting shaft by a threaded connection. The first limiting plate is fixedly arranged on the lower end surface of the cylinder mounting plate and a first waist-shaped hole is provided on the first limiting plate. A group of the first photoelectric sensors are arranged on the first limiting plate by nuts and bolts and can be adjusted in position within the range of the first waist-shaped hole.

[0012] Furthermore, the locking assembly is also provided with a second limit plate, a second photoelectric sensor and a detection rod, the second limit plate is fixedly arranged on the side of the locking frame, the second limit plate is provided with a second waist-shaped hole, the second photoelectric sensor is arranged on the second limit plate by connecting with nuts and bolts, and the second photoelectric sensor is provided with a group of positions that can be adjusted within the second waist-shaped hole, and the detection rod is arranged on the bottom mold clamping block close to the side of the reduction motor.

[0013] Furthermore, the lower connecting plate is provided with a waist-shaped hollow hole, the outer dimension of the oil cylinder mounting plate is larger than the dimension of the waist-shaped hollow hole, and the outer dimension of the upper connecting plate is smaller than the dimension of the waist-shaped hollow hole.

[0014] Furthermore, the reduction motor is arranged below a table surface for placing the side mold outside through the motor mounting frame.

[0015] (III) Beneficial effects

[0016] The beneficial effects of the utility model are:

[0017] 1: The utility model can automatically lock the bottom mold by setting a mold locking component, and can also automatically loosen the bottom mold when the product needs to be demoulded, so that the demoulding device can eject the product conveniently. Compared with manual operation, it is safer and more efficient.

[0018] 2: The utility model can realize ejection of the product from the mold through the demoulding device.

[0019] 3: The utility model can control the working stroke of the hydraulic cylinder by adjusting the distance between the two first photoelectric sensors through the limit mechanism, so as to adapt to products of different specifications and improve the versatility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the utility model;

[0021] Figure 2 It is a partial structural schematic diagram of the clamping assembly of the utility model;

[0022] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 yes Figure 2 Enlarged view of point B in the middle;

[0024] Figure 5 It is a partial structural schematic diagram of the demoulding component of the utility model;

[0025] Figure 6 yes Figure 5 Enlarged view of point C in the middle;

[0026] Figure 7 It is a side view of the demoulding component of the utility model;

[0027] Markings in the figure: 1- demoulding component, 2- clamping component, 3- side mold table;

[0028] 1a-hydraulic cylinder, 1b-cylinder mounting plate, 1c-guide column, 1d-lower connecting plate, 1e-upper connecting plate, 1f-limiting mechanism, 1g-waist-shaped hollow hole;

[0029] 1fa-first limit plate, 1fb-first photoelectric sensor, 1fc-connecting shaft, 1fd-detection collision block, 1fe-first waist-shaped hole;

[0030] 2a-locking frame, 2b-transmission screw, 2c-bottom mold clamping block, 2d-driving sprocket, 2e-driven sprocket, 2f-chain, 2g-roller, 2h-roller mounting frame, 2j-motor mounting frame, 2k-reduction motor, 2m-screw nut, 2n-second limit plate, 2p-second photoelectric sensor, 2s-detection rod, 2r-second waist hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] See also Figure 1-7 The device shown is an automatic bottom mold locking and demoulding device for a gravity casting machine, comprising a demoulding component 1 and a locking component 2. The demoulding component 1 is used to eject the cast product, and the locking component 2 is used to clamp the bottom mold or release the bottom mold after casting is completed to facilitate ejection of the product.

[0034] The demoulding assembly 1 is arranged at the lower part of the clamping assembly 2, and the demoulding assembly 1 includes a hydraulic cylinder 1a, a cylinder mounting plate 1b, a guide column 1c, a lower connecting plate 1d and an upper connecting plate 1e. The cylinder body of the hydraulic cylinder 1a is fixedly connected to the cylinder mounting plate 1b, and the piston rod of the hydraulic cylinder 1a is connected to the upper connecting plate 1e. The upper connecting plate 1e can move up and down under the drive of the piston rod of the hydraulic cylinder 1a. The cylinder mounting plate 1b is fixedly connected to the lower connecting plate 1d, and the lower connecting plate 1d is connected to the external table surface for placing the side mold, which plays a fixing role. The upper connecting plate 1e is connected to the clamping assembly 2, and the top of the guide column 1c is fixedly connected to the lower end surface of the upper connecting plate 1e. The guide column 1c is also connected to the cylinder mounting plate 1b through a sliding sleeve. A group of guide columns 1c are provided, and all are connected to the cylinder mounting plate 1b through a sliding sleeve.

[0035] When the hydraulic cylinder 1a is working, its piston rod drives the upper connecting plate 1e to move up and down, and at the same time, a group of guide pillars 1c move with the upper connecting plate 1e through the sliding sleeve, ensuring the stability of the upper connecting plate 1e when it moves up and down. At the same time, the clamping assembly 2 is set on the upper connecting plate 1e and also moves up and down synchronously with the movement of the upper connecting plate 1e. Then it drives the bottom mold to move up and down, so as to lift the product on the bottom mold to facilitate manual or mechanical removal.

[0036] The clamping assembly 2 comprises a clamping frame 2a, a transmission screw 2b, a bottom mold clamping block 2c, a driving sprocket 2d, a driven sprocket 2e, a chain 2f, a roller 2g, a roller mounting frame 2h, a motor mounting frame 2j and a reduction motor 2k. The clamping frame 2a is fixedly arranged on the upper end surface of the upper connecting plate 1e, one end of the transmission screw 2b is connected to one side of the clamping frame 2a through a bearing, and the end close to the reduction motor 2k is also connected to the clamping frame 2a through a bearing, and at the same time, it extends out of the outside of the clamping frame 2a and is fixedly connected to the driven sprocket 2e. The reduction motor The rotating shaft of 2k is connected with the driving sprocket 2d, and the two ends of the roller 2g are connected with the two sides of the roller mounting frame 2h through bearings to realize that the transmission screw 2b can rotate. The chain 2f passes through the upper part of the roller 2g and contacts the outer diameter surface of the roller 2g, and is connected with the driving sprocket 2d and the driven sprocket 2e at the same time. The roller mounting frame 2h is connected with the outside through the connecting block to prevent the table from being fixed to the side mold. A group of symmetrically arranged screw nuts 2m are arranged on the transmission screw 2b, and the bottom mold clamping block 2c is also provided with a group of screw nuts 2m respectively arranged through screw nut seats. When the bottom mold is placed on the clamping frame 2a by manual or industrial robot, the reduction motor 2k is operated to drive the transmission screw 2b to rotate so that a group of screw nuts 2m arranged on the transmission screw 2b can move in the opposite direction or in the opposite direction, thereby realizing the action of clamping or loosening the bottom mold.

[0037] Specifically, the demoulding component 1 is also provided with a limiting mechanism 1f, which includes a first limiting plate 1fa, a group of first photoelectric sensors 1fb, a connecting shaft 1fc and a detection collision block 1fd. The connecting shaft 1fc is arranged at the lower end of the guide column 1c close to the side of the reduction motor 2k, and the detection collision block 1fd is arranged on the connecting shaft 1fc by threaded connection. The first limiting plate 1fa is fixedly arranged on the lower end surface of the cylinder mounting plate 1b and the first limiting plate 1fa is provided with a first waist-shaped hole 1fe. A group of first photoelectric sensors 1fb are arranged on the first limiting plate 1fa by nuts and bolts and can be adjusted in position within the range of the first waist-shaped hole 1fe. When the piston rod of the hydraulic cylinder 1a is pushed up, the detection collision block 1fd arranged on the connecting shaft 1fc also moves up. When it reaches the position of the first photoelectric sensor 1fb at the top, the hydraulic cylinder 1a stops working and the ejection of the product is completed. However, when the piston rod of the hydraulic cylinder 1a falls back, the detection block 1fd moves to the position of the first photoelectric sensor 1fb at the bottom, and the first photoelectric sensor 1fb detects the detection block 1fd. At this time, the hydraulic cylinder 1a stops working and completes the fall back.

[0038] Specifically, the clamping assembly 2 is also provided with a second limiting plate 2n, a second photoelectric sensor 2p and a detection rod 2s. The second limiting plate 2n is fixedly arranged on the side of the clamping frame 2a. The second limiting plate 2n is provided with a second waist-shaped hole 2r. The second photoelectric sensor 2p is arranged on the second limiting plate 2n by connecting with nuts and bolts, and the second photoelectric sensor 2p is provided with a group of positions that can be adjusted in the second waist-shaped hole 2r. The detection rod 2s is arranged on the bottom mold clamping block 2c close to the side of the reduction motor 2k. A group of bottom mold clamping blocks 2c are driven by a group of symmetrically arranged screw nuts 2m to move. When the bottom mold needs to be clamped, the group of screw nuts 2m are controlled by the operation of the reduction motor 2k to achieve opposite movement. The detection rod 2s moves with one of the bottom mold clamping blocks 2c. When it moves to the position of the second photoelectric sensor 2p far away from one end of the reduction motor 2k, the clamping action is completed. When the bottom mold needs to be loosened from the clamping assembly 2, the reduction motor 2k runs in the reverse direction, and a group of screw nuts 2m move in the reverse direction to achieve the purpose of loosening the bottom mold. This replaces the manual work of clamping or loosening the bottom mold, improves work efficiency, and reduces the occurrence of safety accidents.

[0039] Specifically, the lower connecting plate 1d is provided with a waist-shaped hollow hole 1g, the outer dimension of the oil cylinder mounting plate is larger than the dimension of the waist-shaped hollow hole 1g, and the outer dimension of the upper connecting plate 1e is smaller than the dimension of the waist-shaped hollow hole 1g. The reduction motor 2k is arranged below the table surface for placing the side mold outside through the motor mounting frame 2j.

[0040] Working principle: When the bottom mold is placed on the clamping frame 2a manually or by an industrial robot, the reduction motor 2k runs, driving the transmission screw 2b to rotate so that a group of screw nuts 2m set on the transmission screw 2b can move in the opposite direction or in the opposite direction. A group of bottom mold clamping blocks 2c are driven by a group of symmetrically arranged screw nuts 2m to move in the opposite direction. When the bottom mold needs to be clamped, the operation control of the reduction motor 2k is used to control a group of screw nuts 2m to move in the opposite direction. The detection rod 2s moves with one of the bottom mold clamping blocks 2c. When it moves to the position of the second photoelectric sensor 2p far away from one end of the reduction motor 2k, the clamping action is completed. When the bottom mold needs to be loosened from the clamping assembly 2, the reduction motor 2k runs in the opposite direction, and a group of screw nuts 2m move in the opposite direction to achieve the purpose of loosening the bottom mold.

[0041] When the hydraulic cylinder 1a is working, its piston rod drives the upper connecting plate 1e to move up and down, and at the same time, a group of guide pillars 1c move together with the upper connecting plate 1e through the sliding sleeve, ensuring the stability of the upper connecting plate 1e when it moves up and down. At the same time, the clamping assembly 2 is arranged on the upper connecting plate 1e and also realizes synchronous up and down movement with the movement of the upper connecting plate 1e. When the piston rod of the hydraulic cylinder 1a is pushed up, the detection block 1fd arranged on the connecting shaft 1fc also moves up accordingly. When it reaches the position of the first photoelectric sensor 1fb at the top, the hydraulic cylinder 1a stops working and completes the ejection of the product. However, when the piston rod of the hydraulic cylinder 1a falls back, when the detection block 1fd moves to the position of the first photoelectric sensor 1fb at the bottom, the first photoelectric sensor 1fb detects the detection block 1fd, and at this time, the hydraulic cylinder 1a stops working and completes the fall back.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for automatically locking and demoulding a bottom mold for a gravity casting machine, characterized in that: It comprises a demoulding component (1) and a mold locking component (2), wherein the demoulding component (1) is arranged at the lower part of the mold locking component (2), and the demoulding component (1) comprises a hydraulic cylinder (1a), a cylinder mounting plate (1b), a guide column (1c), a lower connecting plate (1d) and an upper connecting plate (1e), wherein the cylinder body of the hydraulic cylinder (1a) is fixedly connected to the cylinder mounting plate (1b), the piston rod of the hydraulic cylinder (1a) is connected to the upper connecting plate (1e), the cylinder mounting plate (1b) is fixedly connected to the lower connecting plate (1d), the lower connecting plate (1d) is connected to an external table surface for placing a side mold, the upper connecting plate (1e) is connected to the mold locking component (2), the top end of the guide column (1c) is fixedly connected to the lower end surface of the upper connecting plate (1e), and the guide column (1c) is also connected to the cylinder mounting plate (1b) via a sliding sleeve; The mold locking assembly (2) comprises a mold locking frame (2a), a transmission screw (2b), a bottom mold clamping block (2c), a driving sprocket (2d), a driven sprocket (2e), a chain (2f), a roller (2g), a roller mounting frame (2h), a motor mounting frame (2j) and a reduction motor (2k); the mold locking frame (2a) is fixedly arranged on the upper end surface of the upper connecting plate (1e); one end of the transmission screw (2b) is connected to a side edge of the mold locking frame (2a) via a bearing; the end close to the reduction motor (2k) is also connected to the mold locking frame (2a) via a bearing; and the end extends out of the mold locking frame (2a) to be fixed to the driven sprocket (2e). The rotating shaft of the reduction motor (2k) is connected to the driving sprocket (2d), the two ends of the roller (2g) are connected to the two sides of the roller mounting frame (2h) through bearings, the chain (2f) passes through the upper part of the roller (2g) and contacts the outer diameter surface of the roller (2g), and is connected to the driving sprocket (2d) and the driven sprocket (2e) at the same time, the roller mounting frame (2h) is fixedly connected to the table for placing the side mold outside through a connecting block, the transmission screw (2b) is provided with a group of symmetrically arranged screw nuts (2m), and the bottom mold clamping block (2c) is also provided with a group of screw nuts (2m) respectively arranged on a group of screw nuts (2m) through screw nut seats.

2. The automatic bottom mold locking and demoulding device for a gravity casting machine according to claim 1, characterized in that: The guide pillars (1c) are provided in a group and are all connected to the oil cylinder mounting plate (1b) via a sliding sleeve.

3. The automatic bottom mold locking and demoulding device for a gravity casting machine according to claim 1 is characterized in that: The demoulding component (1) is also provided with a limiting mechanism (1f), and the limiting mechanism (1f) comprises a first limiting plate (1fa), a group of first photoelectric sensors (1fb), a connecting shaft (1fc) and a detection collision block (1fd), wherein the connecting shaft (1fc) is arranged at the lower end of the guide column (1c) on the side close to the reduction motor (2k), and the detection collision block (1fd) is arranged on the connecting shaft (1fc) by means of a threaded connection, the first limiting plate (1fa) is fixedly arranged on the lower end surface of the cylinder mounting plate (1b) and a first waist-shaped hole (1fe) is arranged on the first limiting plate (1fa), and a group of the first photoelectric sensors (1fb) are arranged on the first limiting plate (1fa) by means of a nut and a bolt connection and can be adjusted in position within the range of the first waist-shaped hole (1fe).

4. The automatic bottom mold locking and demoulding device for a gravity casting machine according to claim 1, characterized in that: The mold locking assembly (2) is also provided with a second limiting plate (2n), a second photoelectric sensor (2p) and a detection rod (2s); the second limiting plate (2n) is fixedly arranged on the side of the mold locking frame (2a); the second limiting plate (2n) is provided with a second waist-shaped hole (2r); the second photoelectric sensor (2p) is arranged on the second limiting plate (2n) by connecting with nuts and bolts, and the second photoelectric sensor (2p) is provided with a group of positions that can be adjusted in the second waist-shaped hole (2r); the detection rod (2s) is arranged on the bottom mold clamping block (2c) close to the side of the reduction motor (2k).

5. The automatic bottom mold locking and demoulding device for a gravity casting machine according to claim 1, characterized in that: The lower connecting plate (1d) is provided with a waist-shaped hollow hole (1g), the outer dimension of the oil cylinder mounting plate is larger than the dimension of the waist-shaped hollow hole (1g), and the outer dimension of the upper connecting plate (1e) is smaller than the dimension of the waist-shaped hollow hole (1g).

6. The automatic bottom mold locking and demoulding device for a gravity casting machine according to claim 1, characterized in that: The reduction motor (2k) is arranged below a table surface for placing the side mold in the outside through the motor mounting frame (2j).

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