Die locking device for die casting machine

Abstract

The utility model discloses a mould locking device for die casting machinery, which comprises an upper mould, a lower mould and a top plate, a driving mechanism is fixedly mounted on the top end surface of the top plate, and a locking mechanism is fixedly mounted on the side surface of the upper mould; the locking mechanism comprises a mounting part, a first hinge part is fixedly mounted on the side face of the mounting part, a pneumatic push rod is mounted on the side face of the first hinge part in a hinged mode, and a second hinge part is fixedly mounted on the end face of the pneumatic push rod. After mold closing, the pneumatic push rod is opened to pull the second hinge piece, drive the first connecting rod to deflect, apply force to the second connecting rod, guarantee that the second connecting rod cannot be separated from the protruding block and improve mold locking force, a traditional toggle rod type mold closing locking mechanism is replaced with a clamping type locking mechanism, the structural simplicity is improved, and then adjustment and use convenience is improved; and the force transmission of the clamping type locking mechanism is more direct and rapid, the service life is long, the mold locking force is stable, and the quality of produced products is high.

Description

Technical Field

[0001] The utility model relates to the technical field of die-casting machine clamping, in particular to a die-casting machine clamping device. Background Art

[0002] Die casting machine is a machine used for pressure casting. It includes hot press chamber and cold press chamber, and is divided into two types: vertical and horizontal. Under the action of pressure, the die casting machine hydraulically injects molten metal into the mold for cooling and forming. After the mold is opened, a solid metal casting can be obtained. Metal die casting is currently a relatively efficient metal casting method, with the advantages of short production cycle, good product mechanical properties, excellent surface quality, good quality reproducibility, easy to realize automation, and suitable for large-scale repeated production.

[0003] At present, the most widely used die-casting machine clamping mechanism is the toggle type clamping locking mechanism, also known as the three-plate mechanism. This clamping mechanism mainly relies on the oil cylinder to drive the toggle to bend and stretch to complete the mold shifting and locking. The reliability of locking mainly depends on the stiffness of the toggle system. Precise positioning is required when locking. The tie rod is generally fixed by a locking nut, and the structure is complex. Therefore, when replacing the mold, it is cumbersome to remove the tie rod, the mold adjustment is complicated, and the clamping force balance adjustment in the tie rod is cumbersome. Long-term use will cause the locking nut to loosen and the hinge to wear easily, resulting in changes in the clamping force, which ultimately affects the product quality. And as the volume of die-casting products increases, the clamping force increases, and the problems of small mold capacity, large volume, and complex structural design of the toggle mechanism become more and more obvious.

[0004] Therefore, it is necessary to provide a clamping device for a die-casting machine to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a clamping device for a die-casting machine.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a locking device for a die-casting machine, comprising an upper mold, a lower mold and a top plate, the top surface of the top plate is fixedly installed with a driving mechanism, and the side surface of the upper mold is fixedly installed with a locking mechanism; the locking mechanism includes a mounting member, a hinged member 1 is fixedly installed on the side surface of the mounting member, a pneumatic push rod is hingedly installed on the side surface of the hinged member 1, a hinged member 2 is fixedly installed on the end surface of the pneumatic push rod, a hinged member 3 is fixedly installed on the side surface of the upper mold, a connecting rod 1 is hingedly installed on the inner wall of the hinged member 3, and the end surface of the connecting rod 1 is hingedly connected to the inside of the hinged member 2.

[0007] As a further description of the above technical solution:

[0008] The third hinged part is hingedly installed with a second connecting rod, a side surface of the second connecting rod is fixedly provided with a sliding groove, one end surface of the connecting rod is hingedly connected to the inner wall of the sliding groove through a fixing pin, a clamping block is fixedly installed on the second end surface of the connecting rod, and the side surface of the second connecting rod is hingedly connected to the inside of the third hinged part.

[0009] As a further description of the above technical solution:

[0010] The driving mechanism comprises a fixing plate, a driving motor is fixedly mounted on the side of the fixing plate, through holes are opened through the top plate from top to bottom, a bearing sleeve is fixedly mounted inside the through hole, and the side of the driving motor transmission rod is fixedly connected to the inner wall of the bearing sleeve.

[0011] As a further description of the above technical solution:

[0012] A threaded rod is fixedly mounted on the end surface of the driving motor transmission rod, a threaded sleeve is threadedly mounted on the side surface of the threaded rod, and the bottom end surface of the threaded sleeve is fixedly connected to the upper mold.

[0013] As a further description of the above technical solution:

[0014] A guide rail is fixedly installed on the bottom end surface of the top plate, and the end surface of the guide rail is fixedly connected to the lower mold. Through holes are opened in the upper and lower parts of the upper mold, and a sliding sleeve is fixedly installed on the inner wall of the through hole. The inner wall of the sliding sleeve is slidably connected to the side surface of the guide rail. A sealing assembly is fixedly installed on the bottom end surface of the upper mold.

[0015] As a further description of the above technical solution:

[0016] A convex block is fixedly installed on the side surface of the lower mold, and an injection pipe is fixedly installed on the side surface of the lower mold.

[0017] As a further description of the above technical solution:

[0018] A fixing block is fixedly installed on the side surface of the lower mold.

[0019] The utility model has the following beneficial effects:

[0020] 1. Compared with the prior art, the clamping device for the die-casting machinery opens the pneumatic push rod to pull the hinge part 2 after the mold is closed, drives the connecting rod 1 to deflect, applies a force to the connecting rod 2, ensures that the connecting rod 2 will not separate from the protrusion, and improves the clamping force. The traditional elbow-type mold locking mechanism is replaced by a snap-on locking mechanism, which improves the simplicity of the structure, and thus improves the convenience of adjustment and use; and the snap-on locking mechanism has a more direct and rapid force transmission, a long service life, a stable clamping force, and high-quality products.

[0021] 2. Compared with the prior art, the locking device for the die-casting machinery installs a driving motor to drive the threaded rod to rotate, and cooperates with the threaded sleeve to push the threaded sleeve to move, further pushing the upper mold to move on the side of the guide rail, so that the sealing assembly and the lower mold fit tightly to perform the mold closing operation, which can improve the sealing performance of the device during mold closing, thereby improving the quality of the products produced by the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a mold locking device for a die-casting machine proposed by the utility model;

[0023] Figure 2 This is a partial structural schematic diagram of a mold clamping device for a die-casting machine proposed by the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of a convex block of a die-locking device for a die-casting machine proposed by the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of a clamping block in a clamping state of a die-casting machine clamping device proposed by the utility model;

[0026] Figure 5 The utility model is a schematic structural diagram of a clamping block in an open state of a mold locking device for a die-casting machine.

[0027] Legend:

[0028] 1. Lower mold; 2. Fixed block; 3. Guide rail; 4. Top plate; 5. Fixed plate; 6. Drive motor; 7. Threaded rod; 8. Threaded sleeve; 9. Upper mold; 10. Sliding sleeve; 11. Sealing assembly; 12. Bearing sleeve; 13. Injection pipe; 14. Mounting part; 15. Hinge 1; 16. Pneumatic push rod; 17. Hinge 2; 18. Hinge 3; 19. Connecting rod 1; 20. Connecting rod 2; 21. Slide; 22. Block; 23. Bump. DETAILED DESCRIPTION

[0029] 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.

[0030] Reference Figure 1-Figure 5The utility model provides a locking device for a die-casting machine, comprising an upper mold 9, a lower mold 1 and a top plate 4, a driving mechanism is fixedly installed on the top surface of the top plate 4, and a locking mechanism is fixedly installed on the side surface of the upper mold 9;

[0031] The locking mechanism includes a mounting part 14, a hinge part 15 is fixedly mounted on the side of the mounting part 14, a pneumatic push rod 16 is hingedly mounted on the side of the hinge part 15, a hinge part 2 17 is fixedly mounted on the end face of the pneumatic push rod 16, a hinge part 3 18 is fixedly mounted on the side of the upper mold 9, a connecting rod 19 is hingedly mounted on the inner wall of the hinge part 3 18, and the end face of the connecting rod 19 is hingedly connected to the inside of the hinge part 2 17. When the mold is closed, the pneumatic push rod 16 is opened to pull the hinge part 2 17, so as to drive the connecting rod 1 19 to deflect, and apply a force to the connecting rod 2 20 to ensure that the connecting rod 20 will not separate from the protrusion 23, thereby improving the clamping force, and replacing the traditional elbow-type mold closing locking mechanism with a snap-on locking mechanism, thereby improving the simplicity of the structure, and further improving the convenience of adjustment and use; and the snap-on locking mechanism has a more direct and rapid force transmission, a long service life, a stable clamping force, and high-quality products produced.

[0032] A connecting rod 20 is hingedly installed inside the hinged part 3 18, and a slide groove 21 is fixedly opened on the side of the connecting rod 20. The end face of the connecting rod 19 is hingedly connected to the inner wall of the slide groove 21 through a fixing pin. A clamping block 22 is fixedly installed on the end face of the connecting rod 20, and the side face of the connecting rod 20 is hingedly connected to the inside of the hinged part 3 18.

[0033] The driving mechanism includes a fixed plate 5, a driving motor 6 is fixedly installed on the side of the fixed plate 5, a through hole is opened through the top plate 4 from top to bottom, a bearing sleeve 12 is fixedly installed inside the through hole, and the side of the transmission rod of the driving motor 6 is fixedly connected to the inner wall of the bearing sleeve 12.

[0034] A threaded rod 7 is fixedly mounted on the end surface of the transmission rod of the driving motor 6 , a threaded sleeve 8 is threadedly mounted on the side surface of the threaded rod 7 , and the bottom end surface of the threaded sleeve 8 is fixedly connected to the upper mold 9 .

[0035] A guide rail 3 is fixedly installed on the bottom end surface of the top plate 4, and the end surface of the guide rail 3 is fixedly connected to the lower mold 1. A through hole is opened in the upper and lower parts of the upper mold 9, and a sliding sleeve 10 is fixedly installed on the inner wall of the through hole. The inner wall of the sliding sleeve 10 is slidably connected to the side surface of the guide rail 3. A sealing component 11 is fixedly installed on the bottom end surface of the upper mold 9. By installing a driving motor 6, the threaded rod 7 is driven to rotate, and cooperates with the threaded sleeve 8 to push the threaded sleeve 8 to move, and further pushes the upper mold 9 to move on the side of the guide rail 3, so that the sealing component 11 is tightly fitted with the lower mold 1, and the mold closing operation is performed, which can improve the sealing of the device during mold closing, and thus improve the quality of the products produced by the device.

[0036] A convex block 23 is fixedly mounted on the side surface of the lower mold 1 , and an injection pipe 13 is fixedly mounted on the side surface of the lower mold 1 .

[0037] A fixing block 2 is fixedly mounted on the side of the lower mold 1 .

[0038] Working principle: When in use, turn on the driving motor 6, drive the threaded rod 7 to rotate, and cooperate with the threaded sleeve 8 to push the threaded sleeve 8 to move, and further push the upper mold 9 to move on the side of the guide rail 3, so that the sealing component 11 and the lower mold 1 are closely fitted to perform the mold closing operation;

[0039] When closing the mold, the upper mold 9 moves downward to push the hinge part 3 18 downward, thereby driving the connecting rod 20 and the block 22 to move downward. The inclined surface of the block 22 abuts against the convex block 23 and deflects with the hinge part 3 18 as the center. When the deflection reaches a certain degree, the groove on the side of the connecting rod 20 engages with the convex block 23, and the upper mold 9 and the lower mold 1 are locked. At this time, it is also necessary to open the pneumatic push rod 16 to pull the hinge part 2 17, drive the connecting rod 1 19 to deflect, and apply a force to the connecting rod 20 to ensure that the connecting rod 20 will not separate from the convex block 23.

[0040] When demoulding is required, the pneumatic push rod 16 is opened to push the connecting rod 20 to deflect with the hinge 3 18 as the center, driving the connecting rod 20 upward to make the block 22 disengage from the protrusion 23. At this time, the upper mold 9 is separated from the lower mold 1 by the driving motor 6 to complete the demoulding operation.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A clamping device for a die-casting machine, comprising an upper die (9), a lower die (1) and a top plate (4), characterized in that: A driving mechanism is fixedly mounted on the top surface of the top plate (4), and a locking mechanism is fixedly mounted on the side surface of the upper mold (9); The locking mechanism comprises a mounting member (14), a hinged member 1 (15) is fixedly mounted on the side of the mounting member (14), a pneumatic push rod (16) is hingedly mounted on the side of the hinged member 1 (15), a hinged member 2 (17) is fixedly mounted on the end face of the pneumatic push rod (16), a hinged member 3 (18) is fixedly mounted on the side of the upper mold (9), a connecting rod 1 (19) is hingedly mounted on the inner wall of the hinged member 3 (18), and the end face of the connecting rod 1 (19) is hingedly connected to the inside of the hinged member 2 (17).

2. A mold clamping device for a die-casting machine according to claim 1, characterized in that: The hinged part three (18) is hingedly mounted with a connecting rod two (20), a side surface of the connecting rod two (20) is fixedly provided with a slide groove (21), an end surface of the connecting rod one (19) is hingedly connected to an inner wall of the slide groove (21) via a fixing pin, a clamping block (22) is fixedly mounted on the end surface of the connecting rod two (20), and a side surface of the connecting rod two (20) is hingedly connected to the inside of the hinged part three (18).

3. A mold clamping device for a die-casting machine according to claim 1, characterized in that: The driving mechanism comprises a fixing plate (5), a driving motor (6) being fixedly mounted on a side of the fixing plate (5), through holes being provided through the top plate (4) from top to bottom, a bearing sleeve (12) being fixedly mounted inside the through hole, and a side of a transmission rod of the driving motor (6) being fixedly connected to an inner wall of the bearing sleeve (12).

4. A clamping device for a die-casting machine according to claim 3, characterized in that: A threaded rod (7) is fixedly mounted on the end surface of the transmission rod of the driving motor (6), a threaded sleeve (8) is threadedly mounted on the side surface of the threaded rod (7), and the bottom end surface of the threaded sleeve (8) is fixedly connected to the upper mold (9).

5. A mold clamping device for a die-casting machine according to claim 1, characterized in that: A guide rail (3) is fixedly mounted on the bottom end surface of the top plate (4), and the end surface of the guide rail (3) is fixedly connected to the lower mold (1). Through holes are formed through the upper and lower parts of the upper mold (9), and a sliding sleeve (10) is fixedly mounted on the inner wall of the through hole. The inner wall of the sliding sleeve (10) is slidably connected to the side surface of the guide rail (3). A sealing component (11) is fixedly mounted on the bottom end surface of the upper mold (9).

6. A mold clamping device for a die-casting machine according to claim 1, characterized in that: A convex block (23) is fixedly mounted on the side of the lower mold (1), and an injection pipe (13) is fixedly mounted on the side of the lower mold (1).

7. A mold clamping device for a die-casting machine according to claim 1, characterized in that: A fixing block (2) is fixedly mounted on the side of the lower mold (1).

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