Die locking mechanism

Abstract

A die locking mechanism, comprising: a pulling block (2), fixed to a female die plate (10) and provided with a protruding block (20); a sliding block (3), slidably provided on a male die plate (11), wherein an accommodating slot (31) is formed on the side of the sliding block close to the protruding block and is used for accommodating the protruding block and engaging with the protruding block, and a pushing slot (32) is provided on the sliding block; a pushing block (4), fixed to an ejector plate (12) and provided with a pushing end (40), wherein the pushing end is inserted into the pushing slot and used for pushing the sliding block to slide during die opening so as to separate the sliding block from the pulling block; an elastic assembly, arranged on the male die plate, connected to the sliding block, and used for resetting the sliding block during die closing; and a limiting pull rod (5), arranged between the male die plate and the ejector plate, and used for limiting a die opening stroke between the male die plate and the ejector plate, wherein when the male die plate and the ejector plate have been completely opened, the protruding block and the sliding block are separated. The die locking mechanism can enhance the die locking force between a male die and a female die of a die, preventing defects such as burrs from forming at a slag pocket of a product when the casting pressure of the die increases and the die locking force provided by the die-casting die approaches the critical value of the die opening force between the male die plate and the female die plate.

Description

Locking mechanism

[0001] This application claims priority to the Chinese patent application No. 202410970591.9, filed on July 19, 2024, to the Chinese Patent Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of die casting mold, for example, a locking mechanism. BACKGROUND

[0003] Die casting is a metal casting process characterized by using a mold cavity to fill a molten metal liquid under high pressure. In a die casting mold that forms multiple products at a time, in order to fill the molten metal liquid into each cavity, the casting pressure of the mold will be increased accordingly, and the opening force between the male mold plate and the female mold plate will be increased. When the locking force provided by the machine approaches the critical value of the opening force, burrs are easily generated at the slag package of the product, resulting in product defects. SUMMARY

[0004] The present application provides a locking mechanism to solve the above problems.

[0005] A locking mechanism is provided in a die casting mold, the mold comprising a female mold plate, a male mold plate, a spring plate, an upper ejector plate, a lower ejector plate, and a top plate return pin. The locking mechanism comprises:

[0006] A pull block is fixed at one end to the female mold plate and extends towards the male mold plate with a protrusion at the other end;

[0007] A sliding block is slidingly arranged on the male mold plate, and a receiving groove is arranged on the side of the sliding block close to the protrusion, so as to accommodate the protrusion and hook with the protrusion when the mold is closed. A pushing groove is further arranged on the sliding block, and the pushing groove has a guide slope;

[0008] A pushing block is fixed at one end to the spring plate and extends towards the male mold plate with a pushing end at the other end, and the pushing end is inserted into the pushing groove and has a pushing slope. The pushing slope and the guide slope slide against each other. When the mold is opened, the pushing slope presses the guide slope, thereby pushing the sliding block to slide away from the pull block, so that the receiving groove is separated from the protrusion;

[0009] An elastic assembly is arranged on the male mold plate and connected to the end of the sliding block away from the pull block, so as to reset the sliding block when the mold is closed;

[0010] The limiting pull rod is arranged between the male die plate and the elastic plate, and is arranged to limit the mold opening stroke between the male die plate and the elastic plate. When the male die plate and the elastic plate are completely opened, the protrusion and the sliding block have been completely separated.

[0011] In an embodiment, the male die plate is fixed with a pull block positioning block, which is arranged on the side of the protrusion away from the sliding block, and is arranged to position the pull block.

[0012] In an embodiment, the elastic assembly includes an elastic element and a sliding block stopper, wherein: the elastic element is connected with the sliding block and the sliding block stopper at both ends respectively, the sliding block stopper is fixed to the male die plate, and is arranged to limit the sliding stroke of the sliding block, and the elastic element is arranged to reset the sliding block when the mold is closed.

[0013] In an embodiment, the sliding block is arranged to slide in a sliding block seat, the sliding block seat is fixed to the male die plate, the sliding block seat is provided with a sliding groove, the sliding block is provided with a protruding edge, and the sliding block slides relative to the male die plate in the sliding block seat by cooperation of the protruding edge and the sliding groove.

[0014] In an embodiment, the sliding block seat is provided with a clearance groove near the side of the pull block, and the pulling end of the pull block is inserted into the pulling groove after passing through the clearance groove.

[0015] In an embodiment, one end of the limiting pull rod is fixed to the elastic plate, and the end away from the elastic plate is a limiting end, the limiting end is movably arranged in a limiting hole in the male die plate, and the limiting end and the limiting hole are both T-shaped in cross section. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a schematic view of a mold closing state of a mold locking mechanism provided by an embodiment of the present application;

[0017] Fig. 2 is a schematic view of section A-A in Fig. 1;

[0018] Fig. 3 is a schematic view of section B-B in Fig. 1;

[0019] Fig. 4 is a schematic view of a mold opening state of a mold locking mechanism provided by an embodiment of the present application;

[0020] Fig. 5 is a schematic view of section C-C in Fig. 4;

[0021] Fig. 6 is a schematic view of section D-D in Fig. 4;

[0022] Fig. 7 is a schematic view of a pull block structure in a mold locking mechanism provided by an embodiment of the present application;

[0023] Fig. 8 is a schematic view of a sliding block structure in a mold locking mechanism provided by an embodiment of the present application;

[0024] Figure 9 is a schematic diagram of a pulling block structure in a locking mechanism according to an embodiment of the present application;

[0025] Figure 10 is a schematic diagram of a sliding block seat structure in a locking mechanism according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] The present application provides a locking mechanism arranged in a die casting mold, the mold comprising a female mold plate 10, a male mold plate 11, a spring plate 12, an upper ejector plate 13, a lower ejector plate 14, and an ejector plate return pin 15. The locking mechanism comprises:

[0027] A pulling block 2 is fixed at one end to the female mold plate 10 and extends in the direction of the male mold plate 11 and is provided with a protrusion 20. A sliding block 3 is slidingly arranged on the male mold plate 11 and is provided with a receiving groove 31 on the side close to the protrusion 20, which is arranged to receive the protrusion 20 and hook with the protrusion 20 when the mold is closed. The sliding block 3 is further provided with a pulling groove 32, which has a guide inclined surface 320. A pulling block 4 is fixed at one end to the spring plate 12 and extends in the direction of the male mold plate 11 and is provided with a pulling end 40, which is inserted into the pulling groove 32 and has a pulling inclined surface 400, which slidingly engages with the guide inclined surface 320. When the mold is opened, the pulling inclined surface 400 presses the guide inclined surface 320, thereby pulling the sliding block 3 to slide away from the pulling block 2, so that the receiving groove 31 is separated from the protrusion 20. An elastic component is arranged on the male mold plate 11 and connected to the end of the sliding block 3 away from the pulling block 2, which is arranged to reset the sliding block 3 when the mold is closed. A limiting pulling rod 5 is arranged between the male mold plate 11 and the spring plate 12, which is arranged to limit the opening stroke between the male mold plate 11 and the spring plate 12. When the male mold plate 11 and the spring plate 12 are completely opened, the protrusion 20 and the sliding block 3 have been completely separated.

[0028] The male mold plate 11 is fixed with a pulling block positioning block 111, which is arranged on the side of the protrusion 20 away from the sliding block 3, which is arranged to position the pulling block 2.

[0029] The elastic component comprises an elastic element 30 and a sliding block stop 6, wherein the elastic element 30 is connected at both ends to the sliding block 3 and the sliding block stop 6, and the sliding block stop 6 is fixed to the male mold plate 11 and arranged to limit the sliding stroke of the sliding block 3, and the elastic element 30 is arranged to reset the sliding block 3 when the mold is closed.

[0030] The slider 3 is slidingly arranged in a slider seat 7, the slider seat 7 is fixed to the male mold plate 11, the slider seat 7 is provided with a sliding groove 70, the slider 3 is provided with a convex edge 33, the slider 3 is slidingly arranged in the slider seat 7 relative to the male mold plate 11 through the cooperation of the convex edge 33 and the sliding groove 70.

[0031] The slider seat 7 is provided with a clearance groove 71 near one side of the push block 4, the pushing end 40 of the push block 4 is inserted into the pushing groove 32 after passing through the clearance groove 71.

[0032] One end of the limiting pull rod 5 is fixed to the elastic plate 12, the end away from the elastic plate 12 is a limiting end 50, the limiting end 50 is movably arranged in a limiting hole 110 in the male mold plate 11, the cross sections of the limiting end 50 and the limiting hole 110 are both T-shaped.

[0033] The working principle of the present application will be briefly described below in combination with the embodiments of the present application: when the mold is closed, the convex block 20 is accommodated in the accommodation groove 31 and engaged with the slider 3, the pushing end 40 of the push block 4 is accommodated in the pushing groove 32, when die casting, the mold locking mechanism increases the locking force between the female mold plate 10 and the male mold plate 11, thereby ensuring the stability of product forming;

[0034] When the mold is opened, due to the action of the mold locking mechanism, the female mold plate 10 and the male mold plate 11 are not opened first, the male mold plate 11 and the elastic plate 12 are opened first, the push block 4 and the limiting pull rod 5 move with the elastic plate 12 away from the male mold plate 11, the pushing end 40 of the push block 4 pushes the slider 3 to retreat away from the convex block 20, when the male mold plate 11 and the elastic plate 12 are completely opened, the convex block 20 and the slider 3 are completely separated, the male mold plate 11 and the elastic plate 12 stop opening, the female mold plate 10 and the male mold plate 11 are opened, and the product is taken out;

[0035] When the mold is closed again, the elastic plate 12 moves towards the male mold plate 11, the push block 4 and the limiting pull rod 5 move with the elastic plate 12 towards the male mold plate 11, the slider 3 gradually returns to the engagement with the convex block 20 under the action of the restoring force of the elastic element 30, the pushing end 40 of the push block returns to be completely accommodated in the pushing groove 32, the mold is completely closed, and the next die casting is started.

[0036] By arranging a mold locking mechanism, the locking force between the male mold and the female mold of the mold can be enhanced, when the casting pressure of the mold is increased and the locking force provided by the die casting mold approaches the critical value of the opening force between the male mold plate and the female mold plate, the generation of burrs and other adverse conditions at the slag package of the product can be avoided, and the yield of the product is improved.

Claims

1. A mold clamping mechanism arranged in a die casting mold, the mold comprising a female mold plate (10), a male mold plate (11), a toggle plate (12), an upper ejector plate (13), a lower ejector plate (14), and a toggle plate return pin (15), the mold clamping mechanism comprising: a toggle block (2) fixed at one end to the female mold plate (10) and extending in the direction of the male mold plate (11) and provided with a protrusion (20); a slide block (3) slidingly arranged on the male mold plate (11), the slide block (3) being provided on the side close to the protrusion (20) with a receiving groove (31) configured to receive the protrusion (20) and engage with the protrusion (20) when the mold is closed, the slide block (3) further being provided with a pushing groove (32) having a guide inclined surface (320); a pushing block (4) fixed at one end to the toggle plate (12) and extending in the direction of the male mold plate (11) and provided with a pushing end (40) inserted into the pushing groove (32) and having a pushing inclined surface (400) slidingly engaging with the guide inclined surface (320), when the mold is opened, the pushing inclined surface (400) pressing the guide inclined surface (320) to push the slide block (3) to slide away from the toggle block (2) so that the receiving groove (31) is disengaged from the protrusion (20); an elastic assembly arranged on the male mold plate (11) and connected to the slide block (3) away from the toggle block (2) to reset the slide block (3) when the mold is closed; a limiting toggle rod (5) arranged between the male mold plate (11) and the toggle plate (12) to limit the opening stroke between the male mold plate (11) and the toggle plate (12), when the male mold plate (11) and the toggle plate (12) are completely opened, the protrusion (20) and the slide block (3) are completely disengaged. A toggle block positioning block (111) is fixed on the male mold plate (11) and arranged on the side of the protrusion (20) away from the slide block (3) to position the toggle block (2). The elastic assembly comprises an elastic element (30) and a slide block stopper (6), wherein the elastic element (30) is connected at both ends to the slide block (3) and the slide block stopper (6), the slide block stopper (6) is fixed on the male mold plate (11) to limit the sliding stroke of the slide block (3), and the elastic element (30) is configured to reset the slide block (3) when the mold is closed. The slide block (3) is slidingly arranged in a slide block seat (7) fixed on the male mold plate (11), the slide block seat (7) is provided with a sliding groove (70), the slide block (3) is provided with a protruding edge (33), and the slide block (3) slides relative to the male mold plate (11) in the slide block seat (7) by the cooperation of the protruding edge (33) and the sliding groove (70). ​ ​ 2. The lockout mechanism of claim 1, wherein, ​ 3. The lockout mechanism of claim 1, wherein, ​ 4. The lockout mechanism of claim 1, wherein, ​ 5. The locking mechanism of claim 4, wherein, The slider seat (7) is provided with a clearance groove (71) near the side of the dial block (4), and the dialing end (40) of the dial block (4) is inserted into the dialing groove (32) after passing through the clearance groove (71).

6. The locking mechanism of claim 1, wherein, One end of the limiting pull rod (5) is fixed to the elastic plate (12), and the other end of the limiting pull rod (5) away from the elastic plate (12) is a limiting end (50), the limiting end (50) is movably arranged in the limiting hole (110) in the male mold plate (11), and the cross sections of the limiting end (50) and the limiting hole (110) are both T-shaped.

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