Locking mechanism shared by safety lock and mold lock, and casting machine

Abstract

A locking mechanism shared by a safety lock and a mold lock, comprising a differential-pressure locking device, a tooth-shaped self-locking device, and a displacement sensor. The differential-pressure locking device and the tooth-shaped self-locking device are oppositely arranged; the differential-pressure locking device comprises a lock head (10); the tooth-shaped self-locking device comprises an elongated lock tooth body (20) and a plurality of tooth rods (21) protruding out of the lock tooth body; the plurality of tooth rods are longitudinally arranged on the lock tooth body in the vertical direction; a tooth slot (22) is formed between every two adjacent tooth rods; and the lock head is inserted into the tooth slot to achieve locking. Also provided is a casting machine comprising locking mechanisms. A lock head device (1) is arranged on the side surfaces of a moving platen (3) of the locking mechanism, the tooth-shaped self-locking device is arranged on each upright column (4), and the differential-pressure mold filling and locking and the safety insurance are integrated, thereby ensuring mechanical locking of the moving platen, and avoiding potential safety hazards caused by accidental slip of the moving platen; and four locking mechanisms are provided, ensuring that an upper mold cavity and a lower mold cavity can be completely sealed during mold closing, reducing the phenomena of flashes and liquid leakage of casting products.

Description

A locking mechanism shared by a safety lock and a mold lock and a casting machine Technical Field

[0001] The present invention relates to the technical field of casting machines, and in particular to a locking mechanism shared by a safety lock and a mold lock, and a casting machine. Background Art

[0002] Differential pressure casting is a casting method derived from low-pressure casting. On the basis of low-pressure casting, a sealed tank is added to the outer cavity of the mold, and compressed air is pumped into the interior to increase a certain pressure. When the molten metal is filled into the mold cavity, the casting is crystallized and solidified under the action of a higher pressure environment, which can ensure that a higher density casting is obtained.

[0003] Casting equipment usually consists of upper and lower mold cavities. During the casting process, the sealed tank body needs to be inflated. Due to the large area inside the tank body, a huge reaction force will be generated. Traditional casting equipment cannot meet the sealing requirements of the tank body through the oil cylinder compression method. The upper mold cavity and the lower mold cavity of the casting equipment must be completely sealed. If the sealing is not complete, it will cause air leakage, which will lead to large flash and even leakage of the casting product. In addition, after the casting equipment opens the mold, the movable platen is lifted up and needs to be fixed to prevent the movable platen from suddenly falling and posing a construction safety hazard.

[0004] Based on the above technical problems, it is urgent to improve the mold opening mechanism of the casting machine.

[0005] Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a locking mechanism and a casting machine that uses both a safety lock and a mold lock. These locking mechanisms are simple in structure and easy to use. By providing a pressure differential locking device on the side of the casting machine's movable platen and a toothed self-locking device with multiple tooth grooves on the casting machine's columns, the movable platen can be locked at multiple heights, preventing the movable platen from accidentally sliding after rising, which could pose a safety hazard. Furthermore, by providing four sets of locking mechanisms on the casting machine, the upper and lower mold cavities are completely sealed during mold closing, reducing flash and leakage in the casting, thereby improving the quality of the casting. A mold closing locking block is provided below the toothed self-locking device to further ensure mold sealing.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The present invention discloses a locking mechanism shared by a safety lock and a mold lock, comprising a pressure differential locking device, a displacement sensor, and a toothed self-locking device. The pressure differential locking device is mounted on the side of a movable mold plate of the casting machine, and the toothed self-locking device is mounted on the side of a column of the casting machine, so that the pressure differential locking device and the toothed self-locking device are arranged opposite each other.

[0009] The tooth-shaped self-locking device includes a long lock tooth body and several tooth rods protruding from the lock tooth body. The several tooth rods are arranged longitudinally on the lock tooth body in a vertical direction, and tooth grooves are formed between adjacent tooth rods. The locking head of the pressure differential locking device is inserted into the tooth groove to achieve locking.

[0010] Preferably, the gear rod is surrounded by an upper end face, a lower end face and a side end face, the upper end face is perpendicular to the side end face, the lower end face is an inclined face, and the contact point between the lower end face and the side end face is the highest point of the lower end face.

[0011] Preferably, the pressure differential locking device includes a locking body connected to the movable template and a driving cylinder connected to the locking body. The locking body has a accommodating cavity, and the accommodating cavity is provided with a locking head, a telescopic part and a compression spring. The lock head has a concave groove inside, and the telescopic part is accommodated in the concave groove. The end of the telescopic part abuts against the piston rod of the driving cylinder. When the driving cylinder pushes the piston rod to extend, the piston rod pushes the telescopic part to extend, and the lock head is forced to extend outward. The compression spring surrounds the telescopic part. When the lock head is subjected to horizontal inward thrust, the compression spring is tightened and the lock head retracts inward.

[0012] Preferably, the top surface of the lock head is a wedge-shaped surface, and the inclination angle of the wedge-shaped surface is smaller than the inclination angle of the lower end surface of the gear rod; when the movable template moves upward, the lock head is automatically extended after being acted upon by the compression spring, and the lock head contacts the lower end surface of the gear rod and slides upward.

[0013] Preferably, the horizontal inclination angle of the top surface of the lock head ranges from 10 degrees to 15 degrees.

[0014] Preferably, the bottom corners of the lock head are in a 7-shape. When the lock head extends outward, the lock head is inserted into the tooth groove, and the bottom corners of the lock head are limited on the upper end face of the tooth rod; when the movable template moves downward, the bottom corners of the tooth rod and the lock head form an interlocking structure to prevent the movable template from falling.

[0015] Preferably, the locking mechanism shared by the safety lock and the mold lock further includes a mold closing locking block provided below the toothed self-locking device, the mold closing locking block being mounted on the side of the movable platen of the casting machine, and the mold closing locking block being arranged opposite to the pressure differential locking device;

[0016] The mold locking block is a trapezoidal block structure, the lower end face of the mold locking block is an inclined surface, the horizontal inclination angle of the lower end face of the mold locking block is the same or approximately the same as the inclination angle of the top face of the lock head, and when the lower end face of the mold locking block is in contact with the top face of the lock head, the mold locking block limits the lock head.

[0017] The present invention also discloses a casting machine, comprising a locking mechanism shared by the above-mentioned safety lock and the mold lock.

[0018] Preferably, a pair of the pressure differential locking devices are respectively provided on the two opposite sides of the movable template of the casting machine, and a pair of the pressure differential locking devices are respectively arranged on the two corners on the side of the movable template, and the four columns are respectively provided with the toothed self-locking devices corresponding to the pressure differential locking devices, and the four toothed self-locking devices are respectively installed on one side of the column, and the four toothed self-locking devices are the same height; there are four displacement sensors, and the four displacement sensors are respectively installed on the other side of the four columns, and the four displacement sensors are the same height.

[0019] Preferably, the mold clamping locking blocks are respectively provided on the four columns of the casting machine and below the tooth-shaped self-locking device, and the positions and heights of the four mold clamping locking blocks on the four columns are the same.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The locking mechanism provided by the present invention is shared by the safety lock and the mold lock. By arranging a pressure differential locking device on the side of the movable platen of the casting machine and arranging a toothed self-locking device with multiple tooth grooves on the column of the casting machine, the movable platen of the casting machine can be mechanically locked at multiple heights to prevent the movable platen from accidentally sliding after rising, which would cause a safety hazard.

[0022] 2. The locking mechanism provided by the present invention is shared by the safety lock and the mold lock. By arranging a mold locking block below the toothed self-locking device, it helps to improve the sealing of the casting machine tank body. The lock head in the pressure differential locking device can integrate safety insurance and pressure differential filling locking into one, using one component to achieve two functions, which not only optimizes the equipment component structure, but also simplifies the equipment control mechanism, and increases the reliability and operational stability of the equipment.

[0023] 3. The locking mechanism provided by the present invention is shared by the safety lock and the mold lock. By setting the lower end surface of the tooth rod of the toothed self-locking device to an inclined surface and the top surface of the lock head of the pressure differential locking device to a wedge-shaped surface, a ratchet gear structure is formed between the lock head and the tooth rod. This will not form any resistance to the rising of the movable platen of the casting machine, and the lock head can be more smoothly inserted into the tooth groove to achieve locking when the movable platen descends.

[0024] 4. The casting machine provided by the present invention provides four sets of locking mechanisms on the casting machine to ensure that the upper mold cavity and the lower mold cavity can be completely sealed when the mold is closed, thereby reducing flash and leakage of the casting product, thereby improving the quality of the casting product.

[0025] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic structural diagram of a locking mechanism shared by a safety lock and a mold lock of the present invention;

[0027] FIG2 is a schematic structural diagram of the locking mechanism shared by the safety lock and the mold lock of the present invention after the movable platen is raised;

[0028] 3 is a cross-sectional view of the locking mechanism shared by the safety lock and the mold lock of the present invention in a locked state;

[0029] 4 is a cross-sectional view of the unlocked state of the locking mechanism shared by the safety lock and the mold lock of the present invention;

[0030] 5 is a cross-sectional view of the pressure differential locking device of the locking mechanism shared by the safety lock and the mold lock of the present invention;

[0031] FIG6 is a schematic diagram of the locking mechanism of the present invention when the movable platen is lowered to the mold closing position;

[0032] 7 is a schematic structural diagram of the movable platen of the casting machine of the present invention after rising;

[0033] FIG8 is a schematic structural diagram of the movable die plate of the casting machine of the present invention when the mold is closed.

[0034] The accompanying drawings are described as follows: locking head device 1; locking head 10; top surface 100; locking body 11; driving cylinder 12; telescopic member 13; compression spring 14; locking tooth device 2; locking tooth body 20; gear rod 21; upper end surface 210; lower end surface 211; side end surface 212; tooth groove 22; movable template 3; column 4; mold locking block 5; fixing frame 6. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects of the invention easier to understand, the invention is further described below with reference to specific diagrams. However, the invention is not limited to the following implementation cases.

[0036] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0037] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0038] The technical terms in this article are explained as follows:

[0039] Movable platen: The movable platen is a component of the mold opening and closing device of the casting machine. The mold opening and closing device includes a fixed platen and a movable platen. When the mold is opened, the casting product separates from the fixed platen. As the movable platen is lifted upward, the casting product is ejected and falls to the product receiving device on the casting machine under the action of the ejection mechanism of the casting machine.

[0040] Column: The column is an integral part of the casting machine frame structure, which includes a fixed frame arranged on the top, and columns for support are respectively provided at the four corners of the fixed frame, and the bottom end of the column is fixed to the bottom plate of the casting machine.

[0041] The inventive concept of the present invention is to arrange the pressure differential locking device in the locking mechanism at the four corners of the casting dynamic template. When the mold and the sealed tank body are filled, the airtightness of the mold is greatly increased, the yield rate of the casting product is improved, and the flash and leakage of the casting product caused by the uneven force at different positions of the dynamic template of the casting machine can be improved. After the casting machine opens the mold, the dynamic template can be mechanically locked when it is lifted up to avoid the safety hazard caused by the sudden fall of the dynamic template. Furthermore, the locking mechanism of the present invention integrates the pressure differential lock and the safety lock. When the mold is closed, the locking mechanism is used as a pressure differential lock for sealing and locking. When the mold is opened and raised, the locking mechanism is used as a safety lock for mechanical locking. This can reduce the control mechanism of the casting machine and increase the reliability and operational stability of the casting machine.

[0042] Example 1

[0043] As shown in Figure 1, this embodiment discloses a locking mechanism shared by a safety lock and a mold lock, comprising a locking head device 1 and a locking tooth device 2. The locking head device 1 is mounted on the side of the movable platen 3 of the casting machine. Two locking head devices 1 are provided on one side of the movable platen 3, and two more locking head devices 1 are provided on the other side opposite to the first side. The locking tooth devices 2 are mounted on the side of the column 4 of the casting machine. Each locking head device 1 is provided with a corresponding locking tooth device 2, and the locking head devices 1 and locking tooth devices 2 are arranged opposite each other.

[0044] It should be noted that the locking head device 1 is also called a pressure differential locking device, and the two refer to the same component, and the locking tooth device 2 is also called a tooth-shaped self-locking device, and the two refer to the same component.

[0045] As shown in Figure 2, the locking tooth device 2 comprises an elongated locking tooth body 20 and a plurality of tooth rods 21 protruding from the locking tooth body 20. The plurality of tooth rods 21 are arranged vertically on the locking tooth body 20, with tooth grooves 22 formed between adjacent tooth rods 21. The locking head 10 of the locking head device 1 is inserted into these tooth grooves 22 to achieve locking. The distance between adjacent tooth rods 21 is 100 mm, allowing the locking tooth device 2 to have multiple tooth grooves 22 at different heights for the locking head 10 to lock. This allows the casting machine's movable platen 3 to be mechanically locked at multiple heights, preventing the movable platen from accidentally sliding after rising, which could pose a safety hazard.

[0046] As shown in Figure 3, the toothed rod 21 is formed by an upper end surface 210, a lower end surface 211, and a side end surface 212. The upper end surface 210 is perpendicular to the side end surface 212, and the lower end surface 211 is an inclined surface, with the contact point between the lower end surface 211 and the side end surface 212 being the highest point of the lower end surface 211. Preferably, the lower end surface 211 is an outwardly convex curved inclined surface. When the movable plate 3 is rising, the curved inclined surface does not resist the rise of the lock head 10. When the movable plate 3 is descending, the curved inclined surface allows the lock head 10 to more smoothly insert into the tooth groove 22 to achieve locking.

[0047] As shown in Figures 4 and 5, the locking device 1 includes a locking body 11 connected to the dynamic template 3 and a driving cylinder 12 connected to the locking body 11. The locking body 11 has a accommodating cavity, and the accommodating cavity is provided with a lock 10, a telescopic member 13 and a compression spring 14. The lock 10 has a concave groove inside, and the telescopic member 13 is accommodated in the concave groove. The end of the telescopic member 13 abuts on the piston rod of the driving cylinder 12. When the driving cylinder 12 pushes the piston rod to extend, the piston rod pushes the telescopic member 13 to extend, and the lock 10 is forced to extend outward. The compression spring 14 surrounds the telescopic member 13. When the lock 10 is subjected to horizontal inward thrust, the compression spring 14 is tightened and the lock 10 retracts inward.

[0048] The top surface 100 of the lock head 10 is wedge-shaped, with an inclination angle smaller than that of the lower end surface 211 of the toothed rod 21. The horizontal inclination angle of the top surface 100 of the lock head 10 ranges from 10 to 15 degrees. The bottom corners of the lock head 10 are shaped like a figure seven. When the lock head 10 extends outward, it inserts into the toothed grooves 22, with the bottom corners of the lock head 10 being captured by the upper end surface 210 of the toothed rod 21. The ratchet structure formed between the lock head 10 and the toothed rod 21 eliminates resistance to the upward movement of the casting machine's movable platen 3 and allows the lock head 10 to more smoothly insert into the toothed grooves 22 for locking during the descent of the movable platen 3. When the movable platen 3 rises, the lock head 10 slides upward within the toothed grooves 22. When the movable platen 3 stops, the lock head 10 locks into the corresponding toothed grooves 22, thereby ensuring mechanical locking of the movable platen 3. It can be seen from this that when the movable template 3 moves upward, the lock head 10 is automatically extended after being acted upon by the compression spring 14, and the lock head 10 contacts the lower end surface of the tooth rod 21 and slides upward. When the movable template 3 moves downward, the bottom edge corners of the tooth rod 21 form an interlocking structure with the lock head 10 to prevent the movable template 3 from falling, thereby playing a safety role.

[0049] As shown in Figure 6, the locking mechanism shared by the safety lock and the mold lock of this embodiment further includes a mold locking block 5 disposed below the locking tooth device 2. The mold locking block 5 is mounted on the side of the column 4 of the casting machine and is disposed opposite to the locking head device 1. The mold locking block 5 is a trapezoidal block structure, and the lower end surface of the mold locking block 5 is an inclined surface. The horizontal inclination angle of the lower end surface of the mold locking block 5 is the same or approximately the same as the inclination angle of the top surface of the locking head 10. When the lower end surface of the mold locking block 5 is in contact with the top surface of the locking head 10, the mold locking block 5 limits the locking head 10, which helps to improve the sealing of the casting machine tank.

[0050] Example 2

[0051] As shown in FIG1 , FIG7 and FIG8 , this embodiment provides a casting machine, which includes a locking mechanism shared by the safety lock and the mold lock disclosed in Example 1.

[0052] A differential pressure casting machine will be used as an example for specific explanation. The differential pressure casting machine consists of a fixed frame 6 and four columns 4 connected to the four corners of the fixed frame 6 to form a three-dimensional frame structure. A movable platen 3 is provided in the three-dimensional frame structure, and a differential pressure sealing tank is installed at the bottom of the movable platen 3. A pair of locking devices 1 are respectively provided on two opposite sides of the movable platen 3. A pair of locking devices 1 are respectively provided on two corners of the side of the movable platen. The four columns 4 are respectively provided with locking gear devices 2 corresponding to the locking devices 1. The four locking gear devices 2 are positioned at the same height on the four columns 4. The mold closing locking blocks 5 are respectively provided on the four columns 4 below the locking gear devices 2. The four mold closing locking blocks 5 are positioned at the same height on the four columns 4. By providing four sets of locking mechanisms on the casting machine, the upper and lower mold cavities can be completely sealed when the molds are closed, reducing flash and leakage of the casting products, thereby improving the quality of the casting products.

[0053] Each column 4 of the differential pressure casting machine is also equipped with a displacement sensor on its side. This sensor detects the position of the movable platen 3. When the displacement sensor detects that the movable platen 3 has reached the mold closing position, the four locking mechanisms begin to lock. In other words, there are four displacement sensors, each mounted on the other side of each column 4, and all four displacement sensors are at the same height.

[0054] It should be noted that the other components of the pressure differential casting machine are not the main improved parts of the present invention. Their structures are the same as those of the traditional pressure differential casting machine and will not be described in detail here.

[0055] The preferred embodiments of the present invention have been described in detail above. It should be understood that numerous modifications and variations based on the concepts of the present invention are possible without inventive effort by those skilled in the art. Therefore, any technical solution that can be derived by one skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A locking mechanism shared by a safety lock and a mold lock, characterized in that: It includes a pressure differential locking device, a toothed self-locking device and a displacement sensor. The pressure differential locking device is arranged opposite to the toothed self-locking device; the differential pressure locking device includes a locking head, and the toothed self-locking device includes a long strip-shaped lock tooth body and a plurality of tooth rods protruding from the lock tooth body. The plurality of tooth rods are longitudinally arranged on the lock tooth body in a vertical direction, and tooth grooves are formed between adjacent tooth rods. The locking head is inserted into the tooth grooves to achieve locking.

2. The locking mechanism shared by the safety lock and the mold lock according to claim 1, characterized in that: The gear rod is surrounded by an upper end surface, a lower end surface and a side end surface, the upper end surface is perpendicular to the side end surface, the lower end surface is an inclined surface, and the contact point between the lower end surface and the side end surface is the highest point of the lower end surface.

3. The locking mechanism shared by the safety lock and the mold lock according to claim 2, characterized in that: The pressure differential locking device includes a locking body connected to the movable template and a driving cylinder connected to the locking body. The locking body has a accommodating cavity, and a locking head, a telescopic part and a compression spring are arranged in the accommodating cavity. The locking head has a concave groove inside, and the telescopic part is accommodated in the concave groove. The end of the telescopic part abuts against the piston rod of the driving cylinder. When the driving cylinder pushes the piston rod to extend, the piston rod pushes the telescopic part to extend, and the locking head is forced to extend outward. The compression spring surrounds the telescopic part. When the locking head is subjected to horizontal inward thrust, the compression spring is tightened and the locking head retracts inward.

4. The locking mechanism shared by the safety lock and the mold lock according to claim 3, characterized in that: The top surface of the lock head is a wedge-shaped surface, and the inclination angle of the wedge-shaped surface is smaller than the inclination angle of the lower end surface of the gear rod; when the movable template moves upward, the lock head is automatically extended after being acted upon by the compression spring, and the lock head contacts the lower end surface of the gear rod and slides upward.

5. The locking mechanism shared by the safety lock and the mold lock according to claim 4, characterized in that: The horizontal inclination angle of the top surface of the lock head ranges from 10 degrees to 15 degrees.

6. The locking mechanism shared by the safety lock and the mold lock according to claim 3, characterized in that: The bottom corners of the lock head are in the shape of a figure 7. When the lock head extends outward, the lock head is inserted into the tooth groove, and the bottom corners of the lock head are limited on the upper end surface of the gear rod; when the movable template moves downward, the bottom corners of the gear rod and the lock head form an interlocking structure to prevent the movable template from falling.

7. The locking mechanism shared by the safety lock and the mold lock according to claim 1, characterized in that: It also includes a mold locking block arranged below the toothed self-locking device, the mold locking block is installed on the side of the column of the casting machine, and the mold locking block is arranged opposite to the pressure differential locking device; The mold locking block is a trapezoidal block structure, the lower end face of the mold locking block is an inclined surface, the horizontal inclination angle of the lower end face of the mold locking block is the same or approximately the same as the inclination angle of the top face of the lock head, and when the lower end face of the mold locking block is in contact with the top face of the lock head, the mold locking block limits the lock head.

8. A casting machine, characterized in that: A locking mechanism comprising the safety lock according to any one of claims 1 to 7 and a common locking mechanism for a mold lock.

9. The casting machine according to claim 8, characterized in that A pair of the pressure differential locking devices are respectively provided on the two opposite sides of the movable template, and a pair of the pressure differential locking devices are respectively arranged on the two corners on the side of the movable template. The four columns are respectively provided with the toothed self-locking devices corresponding to the pressure differential locking devices. The four toothed self-locking devices are respectively installed on one side of the column, and the four toothed self-locking devices are the same height; there are four displacement sensors, and the four displacement sensors are respectively installed on the other side of the four columns, and the four displacement sensors are the same height.

10. The casting machine according to claim 9, characterized in that The mold clamping locking blocks are respectively arranged on the four columns and below the tooth-shaped self-locking device, and the positions and heights of the four mold clamping locking blocks on the four columns are the same.

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