Four-corner-driven high-torque mold-opening mechanism and casting machine

Abstract

A four-corner-driven high-torque mold-opening mechanism, comprising a frame mechanism, which comprises a fixing frame (5), wherein a pillar (3) is provided on each of the four corners of the fixing frame; a mold-opening driving device (1) is provided on the pillars, an output end of the mold-opening driving device being connected below a movable mold plate (2), and the mold-opening driving device providing upward or downward four-corner driving forces for the movable mold plate. Further provided is a casting machine comprising the mold-opening mechanism. The mold-opening mechanism has a simple structure and is convenient to use; the mold-opening driving device provides four-corner driving forces for the movable mold plate of the casting machine simultaneously and in the same direction from below the movable mold plate, such that the mold-opening force at the moment of mold opening and closing is significantly increased, thereby improving the precision of mold opening and closing of the casting machine; thus, the density of a casting product is enhanced, and the occurrence of flash in the casting product is reduced, improving the quality of the casting product.

Description

A four-corner driven high-torque mold opening mechanism and casting machine Technical Field

[0001] The present invention relates to the technical field of casting machines, and in particular to a four-corner driven high-torque mold opening mechanism 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. After the casting of the casting product is completed, the casting equipment needs to drive the upper mold cavity upward, and at the same time drive the casting product out of the lower mold cavity, and pull the casting product out of the mold, so that the casting product falls from the mold to the product receiving device on the casting equipment to complete the production. In the process of the casting product being separated from the lower mold cavity, the moment of mold opening and closing is crucial, and the size of the mold opening force has a particular impact on the product quality of the casting product. When encountering irregular shapes of casting products, the use of traditional pressure differential casting equipment often leads to problems such as non-parallel mold opening positions at different angles of the casting product and unstable mold opening force, causing the parting surface of the casting product to be scratched and strained, seriously affecting the quality of the casting product.

[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 defects of the prior art, the present invention provides a four-corner driven high-torque mold opening mechanism and a casting machine, which have a simple structure and are easy to use. It provides four-corner driving forces to the movable template of the casting machine at the same time and in the same direction from below the movable template through at least two mold opening driving devices, which greatly increases the mold opening force at the moment of mold opening and closing, thereby improving the mold opening and closing accuracy of the casting machine, increasing the density of the casting product, reducing the flash phenomenon of the casting product, and thus improving the quality of the casting product.

[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 four-corner driven high-torque mold opening mechanism, comprising a frame mechanism, wherein the frame mechanism comprises a fixed frame, and columns are provided on the four corners of the fixed frame. A mold opening drive device is provided on the columns, and the output end of the mold opening drive device is connected to the bottom of the movable template. The mold opening drive device provides upward or downward driving forces to the four corners of the movable template simultaneously and in the same direction.

[0009] The present invention also discloses a casting machine, comprising the above-mentioned four-corner driven large torque mold opening mechanism.

[0010] Preferably, the at least two mold opening drive devices are four mold opening drive devices, and the four mold opening drive devices are in contact with four corners of the movable mold plate of the casting machine respectively.

[0011] Preferably, the driving cylinder body is a hydraulic cylinder, and the driving rod is a piston rod of the hydraulic cylinder.

[0012] Preferably, each of the mold opening drive devices further includes an upper fixed seat, which is used to connect the drive rod with the movable template, and the upper fixed seat is integrally formed with or fixedly connected to the movable template.

[0013] Preferably, the upper fixing seat has a through hole, and after the driving rod passes through the through hole, an adjusting nut is connected above the driving rod, and the adjusting nut is installed with an adjusting screw through the positioning hole, and the lower surface of the adjusting screw is against the upper end surface of the driving rod, and the height of the driving rod is adjusted by the adjusting nut and the adjusting screw.

[0014] Preferably, the upper fixing seat is movably connected to a locking buckle with a plate-like structure, and the locking buckle has a locking hole whose shape is adapted to the outer shape of the adjusting nut, and the locking buckle is sleeved on the locking nut through the locking hole; the locking buckle also has an arc-shaped limiting hole, and the fixing screw passes through the arc-shaped limiting hole and is movably connected to the upper fixing seat.

[0015] Preferably, sliding the locking buckle in the horizontal direction can change the position of the fixing screw in the arc-shaped limiting hole, so that a set gap is reserved between the lower end surface of the adjusting nut and the upper end surface of the movable template.

[0016] Preferably, the set gap is between 0.1 mm and 1.6 mm.

[0017] Preferably, each of the mold opening drive devices further includes a lower fixed seat, one end of the lower fixed seat is connected to the column of the casting machine, and the other end of the lower fixed seat is connected to the drive cylinder.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The four-corner driven high-torque mold opening mechanism provided by the present invention provides four-corner driving force to the movable platen simultaneously and in the same direction from below the movable platen of the casting machine through at least two mold opening drive devices, which greatly increases the mold opening force at the moment of mold opening and closing, makes the mold opening force of the four corners of the movable platen stable, and makes the mold opening position parallel, thus avoiding scratches and scratches on the parting surface of irregularly shaped castings, and effectively improving the quality of castings.

[0020] 2. The four-corner driven high-torque mold opening mechanism provided by the present invention further ensures the parallelism of the movable mold plate during mold closing, as well as the spacing accuracy between the movable mold plate and the working plate of the casting machine after mold closing, thereby improving the sealing of the casting machine tank and increasing the density of the casting product.

[0021] 3. The four-corner driven high-torque mold opening mechanism provided by the present invention reserves a set gap between the adjusting nut and the upper surface of the movable platen as a redundant gap, thereby ensuring that when the hydraulic cylinder is lowered to the lowest position, the movable platen is subjected to uniform downward driving force from the four corners, further ensuring the sealing of the casting machine tank.

[0022] 4. The casting machine provided by the present invention effectively reduces the height of the casting machine by arranging the hydraulic cylinder that drives the movable platen to move up and down below the movable platen, thereby facilitating on-site layout and maintenance.

[0023] 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

[0024] FIG1 is a schematic structural diagram of a four-corner driven high torque mold opening mechanism of the present invention;

[0025] FIG2 is a partial enlarged view of FIG1;

[0026] FIG3 is a partial cross-sectional view of FIG2;

[0027] FIG4 is a schematic structural diagram of a casting machine according to the present invention.

[0028] The following are the descriptions of the reference numerals:

[0029] Mold opening drive device 1; drive cylinder 10; drive rod 11; upper fixing seat 13; adjusting nut 14; adjusting screw 15; locking buckle 16; locking hole 160; arc-shaped limit hole 161; fixing screw 162; lower fixing seat 17; movable template 2; column 3; fixing frame 5. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] The technical terms in this article are explained as follows:

[0034] 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.

[0035] 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.

[0036] Four-corner drive: Provides driving force on the four corners of the driven template.

[0037] The inventive concept of this invention lies in repositioning the hydraulic cylinders to enable them to provide a high mold-opening force. Instead of the hydraulic cylinders typically located above the moving platen in conventional casting machines, the invention installs hydraulic cylinders below the moving platen, located at each of its four corners. These cylinders are installed in a positive manner, pushing the moving platen upward to provide a significant mold-opening force, thus preventing quality issues in the casting caused by insufficient mold-opening force.

[0038] Example 1

[0039] As shown in Figures 1 to 3, this embodiment provides a four-corner driven high-torque mold opening mechanism, that is, a four-corner driven high-torque mold opening mechanism for a casting machine, including a frame mechanism, wherein the frame mechanism includes a fixed frame, and columns are provided on the four corners of the fixed frame, and a mold opening drive device is provided on the column, and the output end of the mold opening drive device is connected to the bottom of the movable template, that is, the four-corner driven high-torque mold opening mechanism includes four mold opening drive devices 1, and the four mold opening drive devices 1 are respectively in contact with the four corners of the movable template 2 of the casting machine, each of the mold opening drive devices 1 includes a drive cylinder 10 and a drive rod 11, and the drive rod 11 is stretched and retracted up and down in the vertical direction of the drive cylinder 10 after being subjected to force, and the upper end surface of the drive rod 11 is in contact with the lower end surface of the movable template 2, and the drive cylinder 11 is fixedly connected to the column 3 of the casting machine, and the four mold opening drive devices 1 provide upward or downward four-corner driving force to the movable template 2 at the same time. Specifically, the drive cylinder 10 in the mold opening drive device 1 is a hydraulic cylinder, and the drive rod 11 is the piston rod of the hydraulic cylinder. The lower end surface of the movable platen 2 is connected to the shoulder of the piston rod. In this way, at the moment the casting machine opens the mold, the hydraulic cylinders installed on the four columns 3 work simultaneously to lift the movable platen 2. Compared with traditional casting machines, it can provide greater output force on the four corner drives, greatly increasing the mold opening force at the moment of mold opening and closing, making the mold opening force at the four corners of the movable platen stable and the mold opening position parallel, preventing irregularly shaped castings from being scratched and strained on the parting surface, and effectively improving the quality of the casting products. At the same time, because the hydraulic cylinder is located below the movable platen 2, the height of the casting machine is greatly reduced, facilitating on-site layout and maintenance. In this embodiment, four mold opening drive devices 1 are used to provide driving force to the four corners of the movable platen 2. The number of mold opening drive devices 1 can also be two, with the two mold opening drive mechanisms arranged diagonally to provide driving force to the diagonal corners of the movable platen 2. Similarly, the number of mold opening drive devices 1 can also be 6 or 8. Since the lower end of the mold opening drive device 1 needs to be fixed, when 4 mold opening drive devices 1 are used, they can be fixed by 4 columns 3. If the number of mold opening drive devices 1 exceeds 4, it is necessary to build an additional support component with similar function to the column 3 to fix the mold opening drive device 1. The specific arrangement should be based on actual needs.

[0040] The mold opening drive device 1 also includes an upper fixed seat 13, which is used to connect the drive rod 11 with the movable template 2. The upper fixed seat 13 is integrally formed with the movable template 2 or fixedly connected. Preferably, the upper fixed seat 13 is integrally formed with the movable template 2. It can also be understood that the upper fixed seat 13 is a component of the movable template 2 and is located at the four corners of the movable template 2.

[0041] The upper fixing seat 13 has a through hole. After the drive rod 11 passes through the through hole, an adjusting nut 14 is connected to the top of the drive rod 11. The adjusting nut 14 is installed with an adjusting screw 15 through a positioning hole. Specifically, the upper portion of the drive rod 11 has a thread, which is adapted to the thread on the inner surface of the adjusting nut 14, so that the adjusting nut 14 can be tightened on the drive rod 11. The lower surface of the adjusting screw 15 is against the upper end surface of the drive rod 11. The height of the drive rod 11 is adjusted by the adjusting nut 14 and the adjusting screw 15 to ensure the parallelism of the movable platen during mold closing, as well as the spacing accuracy between the movable platen and the working plate of the casting machine after mold closing, thereby improving the sealing of the casting machine tank and increasing the density of the casting product.

[0042] The upper fixing seat 13 is movably connected to a plate-like locking clip 16. This locking clip 16 has a locking hole 160 shaped to match the outer shape of the adjusting nut. The locking clip 16 is sleeved onto the locking nut 14 through this locking hole 160. For example, if the locking nut 14 has a polygonal shape and the locking hole 160 has the same polygonal shape, the locking clip 16 can function as a locking washer, securing the locking nut 14. Furthermore, the outer side of the locking nut 14 features a polygonal bayonet design that complements the arcuate groove in the locking hole 160, enabling the locking nut 14 to be locked and prevented from loosening at any angle.

[0043] The locking buckle 16 also has an arc-shaped limiting hole 161, and a fixing screw 162 passes through the arc-shaped limiting hole 161 and is movably connected to the upper fixing seat 13. The arc-shaped limiting hole 161 can also be in the shape of an elongated strip, so that the locking nut 14 can be locked and loosened at any angle. For example, sliding the locking buckle 16 in the horizontal direction can change the position of the fixing screw 162 in the arc-shaped limiting hole 161, so that a set gap is reserved between the lower end face of the adjusting nut 14 and the upper end face of the movable template 2. Preferably, the set gap is between 0.1mm and 1.6mm. A set gap is reserved between the adjusting nut and the upper surface of the movable template as a redundant gap, thereby ensuring that when the hydraulic cylinder is lowered to the lowest point, the downward driving force on the four corners of the movable template is uniform, further ensuring the sealing of the casting machine tank.

[0044] The mold-opening drive device 1 further includes a lower fixed base 17, one end of which is connected to the column 3 of the casting machine, and the other end of which is connected to the drive cylinder 10. The lower fixed base 17 has two plate-shaped clamping plates and an annular clamping sleeve connected to the ends of the two clamping plates. The annular clamping sleeve is sleeved on the outer surface of the drive cylinder 10 of the mold-opening drive device 1. The two clamping plates are locked to the column 3 by screws to form a fixed connection, and a locking force is generated on the annular clamping sleeve, so that the annular clamping sleeve clamps the outer surface of the drive cylinder 10, thereby preventing displacement between the drive cylinder 10 and the lower fixed base 17 during the movement of the mold-opening drive device 1.

[0045] Example 2

[0046] As shown in FIG4 , this embodiment provides a casting machine, which includes the high-torque mold opening mechanism with four-corner drive disclosed in Example 1.

[0047] The differential pressure casting machine is taken as an example for specific explanation. The differential pressure casting machine is composed of a fixed frame 5 and four columns 3 connected to the four corners of the fixed frame 5 to form a three-dimensional frame structure. A movable template 2 is provided in the three-dimensional frame structure, and a differential pressure sealing tank is installed at the lower part of the movable template 2. The four corners of the movable template 2 are respectively connected to a mold opening drive device 1. When the differential pressure casting machine needs to open the mold, the four mold opening drive devices 1 generate a large mold opening force to push up the movable template 2 from the four corners. When the differential pressure casting machine needs to close the mold, the four mold opening drive devices 1 pull the movable template 2 from the bottom. The other components of the differential pressure casting machine are not the main improved parts of the present invention. Its structure is the same as that of the traditional differential pressure casting machine and will not be elaborated here.

[0048] 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 four-corner driven high torque mold opening mechanism, characterized in that: The invention comprises a frame mechanism, wherein the frame mechanism comprises a fixed frame, and columns are provided on the four corners of the fixed frame. A mold opening drive device is provided on the columns, and the output end of the mold opening drive device is connected to the bottom of the movable template. The mold opening drive device provides upward or downward driving force to the four corners of the movable template at the same time and in the same direction.

2. The four-corner driven high torque mold opening mechanism according to claim 1, characterized in that: The at least two mold opening drive devices are four mold opening drive devices, and the four mold opening drive devices are respectively in contact with the four corners of the movable mold plate of the casting machine.

3. The four-corner driven high torque mold opening mechanism according to claim 1, characterized in that: The driving cylinder body is a hydraulic cylinder, and the driving rod is a piston rod of the hydraulic cylinder.

4. The four-corner driven high torque mold opening mechanism according to claim 1, 2 or 3, characterized in that: Each of the mold opening drive devices further includes an upper fixed seat, which is used to connect the drive rod with the movable template. The upper fixed seat is integrally formed with or fixedly connected to the movable template.

5. The four-corner driven high torque mold opening mechanism according to claim 4, characterized in that: The upper fixing seat is provided with a through hole. After the driving rod passes through the through hole, an adjusting nut is connected above the driving rod. The adjusting nut is installed with an adjusting screw through the positioning hole. The lower surface of the adjusting screw is against the upper end surface of the driving rod. The height of the driving rod is adjusted by the adjusting nut and the adjusting screw.

6. The four-corner driven high torque mold opening mechanism according to claim 5, characterized in that: The upper fixing seat is movably connected to a locking buckle with a plate-like structure, and the locking buckle has a locking hole whose shape is adapted to the outer shape of the adjusting nut, and the locking buckle is sleeved on the locking nut through the locking hole; the locking buckle also has an arc-shaped limiting hole, and the fixing screw passes through the arc-shaped limiting hole and is movably connected to the upper fixing seat.

7. The four-corner driven high torque mold opening mechanism according to claim 6, characterized in that: Sliding the locking buckle in the horizontal direction can change the position of the fixing screw in the arc-shaped limiting hole, so that a set gap is reserved between the lower end surface of the adjusting nut and the upper end surface of the movable template.

8. The four-corner driven high torque mold opening mechanism according to claim 7, characterized in that: The set gap is between 0.1 mm and 1.6 mm.

9. The four-corner driven high torque mold opening mechanism according to claim 1, characterized in that: Each of the mold opening drive devices further includes a lower fixed seat, one end of which is connected to the column of the casting machine, and the other end of which is connected to the drive cylinder.

10. A casting machine, characterized in that: A high-torque mold opening mechanism comprising a four-corner drive according to any one of claims 1 to 9.

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