Hydraulic buffer device of die clamping mechanism of die casting machine

Abstract

The utility model relates to the technical field of die assembly of die-casting machines, and discloses a hydraulic buffer device of a die assembly mechanism of a die-casting machine, which comprises a base, a lower die is fixedly connected to the top of the base, a hydraulic buffer mechanism is arranged at the top of the base, a die-casting mechanism is arranged at the top of the base, and the hydraulic buffer mechanism comprises a buffer cylinder. The buffer cylinder is fixedly connected to the interior of the base, a connecting shaft is slidably connected to the interior of the buffer cylinder, and a piston is fixedly connected to the bottom of the connecting shaft. During use, through the arranged hydraulic buffer mechanism, when the mounting base drives the upper die to press downwards, the mounting base is in contact with the connecting shaft to extrude the upper die, and the connecting shaft moves downwards along with the mounting base; the piston slides in the buffer cylinder, at the moment, the spring deforms, the preliminary buffer effect is achieved, part of impact force can be absorbed, and meanwhile the piston slides in the buffer cylinder so that hydraulic oil in the buffer cylinder can enter the oil outlet pipe through a gap between the piston and the buffer cylinder.

Description

Technical Field

[0001] This utility model relates to the field of die-casting machine mold closing technology, specifically a hydraulic buffer device for a die-casting machine mold closing mechanism. Background Technology

[0002] Die casting machines are a series of industrial casting machines that use pressure to inject molten metal into a mold, where it cools and solidifies, resulting in a solid metal casting after the mold is opened. The die casting machine pours liquid or semi-liquid metal into its injection chamber, and then the injection piston (punch) forces it into the gating system and cavity of the die casting mold at high speed and pressure. Under certain pressure, the metal crystallizes and solidifies, forming the casting. Finally, the die casting mold is opened to obtain the casting. Die casting machines are classified as vertical or horizontal. The upper mold of the die casting machine is hydraulically driven, which can easily cause impact and vibration when the upper and lower molds close, potentially reducing the overall service life of the die casting machine over time.

[0003] According to the description in the patent announcement (CN210702479U) of a hydraulic mold closing mechanism for a die casting machine, the hydraulic mold closing mechanism for a die casting machine includes "machine base, tail plate, template A, template B" etc., to perform mold closing work.

[0004] Regarding the above description, the applicant believes the following issues exist:

[0005] The hydraulic mold closing mechanism used in this die-casting machine utilizes the machine base, tail plate, template A, and template B to perform mold closing operations. During operation, this mechanism moves the support plate by hydraulic rods, thereby achieving the mold closing operation of template A and template B. However, there is no buffering work between template A and template B during the mold closing process, which easily generates impact and vibration when closing. Over time, this can reduce the overall service life of the die-casting machine, so this mechanism needs to be improved. Utility Model Content

[0006] The purpose of this invention is to provide a hydraulic buffer device for the die-casting machine's mold-closing mechanism to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic buffer device for a die-casting machine mold closing mechanism, comprising a base, a lower mold fixedly connected to the top of the base, a hydraulic buffer mechanism provided on the top of the base, and a die-casting mechanism provided on the top of the base;

[0008] The hydraulic buffer mechanism includes a buffer cylinder, which is fixedly connected to the inside of the base. A connecting shaft is slidably connected inside the buffer cylinder, and a piston is fixedly connected to the bottom of the connecting shaft. The piston is slidably connected inside the buffer cylinder. A spring is sleeved around the connecting shaft. An oil inlet pipe is fixedly connected to the bottom of the buffer cylinder. A first connecting pipe is fixedly connected to the bottom of the oil inlet pipe. A liquid storage tank is fixedly connected to the rear side of the first connecting pipe. A load-bearing frame is fixedly connected to the bottom of the liquid storage tank. The load-bearing frame is fixedly connected to the left side of the base. A pump body is fixedly connected to the outside of the first connecting pipe. An oil outlet pipe is fixedly connected to the left side of the buffer cylinder. A three-way pipe is fixedly connected to the left side of the oil outlet pipe. A second connecting pipe is fixedly connected to the left side of the three-way pipe. The second connecting pipe is fixedly connected to the top of the liquid storage tank.

[0009] Preferably, the top of the spring is fixedly connected to the top of the buffer cylinder, the bottom of the spring is fixedly connected to the top of the piston, and a rubber pad is provided on the top of the connecting shaft to provide a buffering effect when the mounting seat squeezes the connecting shaft under the action of the spring.

[0010] Preferably, the piston diameter is smaller than the inner diameter of the buffer cylinder, and the pump body is fixedly connected to the top of the support frame, so that when the piston moves downward in the buffer cylinder to squeeze the hydraulic oil, the hydraulic oil can enter the oil outlet pipe through the gap between the piston and the buffer cylinder.

[0011] Preferably, the buffer cylinder, connecting shaft, spring, piston, oil inlet pipe, first connecting pipe, pump body, and oil outlet pipe are provided in two sets. The two sets of the buffer cylinder, connecting shaft, spring, piston, oil inlet pipe, first connecting pipe, pump body, and oil outlet pipe are symmetrically distributed on the right side of the three-way pipe, and the two sets of the buffer cylinder are symmetrically fixedly connected to the inside of the base. By setting two sets, the buffer balance can be improved.

[0012] Preferably, the die-casting mechanism includes a mounting frame, which is fixedly connected to the top of the base. A hydraulic cylinder is fixedly connected to the top of the mounting frame, and a mounting seat is fixedly connected to the bottom of the hydraulic cylinder. The mounting seat is located on the top of the connecting shaft, and an upper mold is fixedly connected to the bottom of the mounting seat. The upper mold is slidably connected to the lower mold, and a limit rod is slidably connected inside the mounting seat. The limit rod is fixedly connected to the top of the base.

[0013] Preferably, the bottom of the mounting base is in contact with the top of the connecting shaft, and a rubber pad is provided at the bottom of the mounting base so that the rubber pad can play a protective role when the mounting base is in contact with the connecting shaft.

[0014] Preferably, two limiting rods are provided, and the two limiting rods are slidably connected inside the mounting base, so that the stability of the upper mold can be ensured when the mounting base drives the upper mold to move through the limiting rods.

[0015] Compared with the prior art, this utility model provides a hydraulic buffer device for the mold closing mechanism of a die-casting machine, which has the following beneficial effects:

[0016] The hydraulic buffer device of the die-casting machine's mold-closing mechanism, through its hydraulic buffer structure, ensures that when the mounting seat pushes the upper mold down, the mounting seat contacts the connecting shaft, compressing it. The connecting shaft then moves downward, and the piston slides within the buffer cylinder. At this time, the spring deforms, providing initial buffering and absorbing some of the impact force. Simultaneously, the sliding of the piston within the buffer cylinder allows hydraulic oil to enter the outlet pipe through the gap between the piston and the buffer cylinder, and then enters the storage tank through the tee pipe and the second connecting pipe. Under the action of the hydraulic oil, it further provides hydraulic buffering for the mold-closing of the upper and lower molds, greatly reducing vibration and impact during the mold-closing process, effectively protecting the various components of the die-casting machine, and extending the service life of the equipment. Through the pump's delivery and control of the hydraulic oil, the hydraulic pressure within the buffer cylinder can be precisely adjusted, thereby achieving flexible adjustment of the buffering performance. Under different die-casting process requirements, the pump's operating parameters can be adjusted according to the actual situation. When the mounting seat moves upward, the spring resets, causing the connecting shaft to reset as well. The hydraulic oil is then transported back to the buffer cylinder through the pump and the first connecting pipe via the inlet pipe, realizing the recycling of the hydraulic oil.

[0017] The hydraulic buffer device of the die-casting machine's mold-closing mechanism, through the die-casting mechanism, when the material to be die-cast is in the lower mold, drives the mounting seat and the upper mold to move via a hydraulic cylinder, and causes the mounting seat to slide around the limit rod, so that the upper mold moves into the lower mold. The material can then be die-cast under the action of the upper and lower molds. The limit rod is fixedly connected to the top of the base. The setting of two limit rods can effectively limit the movement direction of the mounting seat, ensuring the accurate positioning of the upper and lower molds during the mold-closing process, thus improving the quality and precision of the die-cast products. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the hydraulic buffer mechanism.

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the buffer cylinder;

[0023] Figure 5 This is a schematic diagram of the structure on the left side of the oil outlet pipe;

[0024] Figure 6 This is a schematic diagram of the die-casting mechanism.

[0025] In the diagram: 1. Base; 2. Lower mold; 3. Hydraulic buffer mechanism; 4. Die-casting mechanism; 31. Buffer cylinder; 32. Oil outlet pipe; 33. Connecting shaft; 34. Oil inlet pipe; 35. First connecting pipe; 36. Support frame; 37. Spring; 38. Piston; 39. Pump body; 391. Liquid storage tank; 392. T-pipe; 393. Second connecting pipe; 41. Mounting bracket; 42. Mounting seat; 43. Hydraulic cylinder; 44. Limiting rod; 45. Upper mold. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] This utility model provides the following technical solution:

[0029] Example 1

[0030] Please see Figure 1-6 This utility model provides a technical solution: a hydraulic buffer device for the mold closing mechanism of a die casting machine, including a base 1, a lower mold 2 fixedly connected to the top of the base 1, a hydraulic buffer mechanism 3 provided on the top of the base 1, and a die casting mechanism 4 provided on the top of the base 1.

[0031] The hydraulic buffer mechanism 3 includes a buffer cylinder 31, which is fixedly connected to the inside of the base 1. A connecting shaft 33 is slidably connected inside the buffer cylinder 31. A piston 38 is fixedly connected to the bottom of the connecting shaft 33 and is slidably connected inside the buffer cylinder 31. A spring 37 is sleeved around the connecting shaft 33. An oil inlet pipe 34 is fixedly connected to the bottom of the buffer cylinder 31. A first connecting pipe 35 is fixedly connected to the bottom of the oil inlet pipe 34. A liquid storage tank 391 is fixedly connected to the rear side of the first connecting pipe 35. A load-bearing frame 36 is fixedly connected to the bottom of the liquid storage tank 391 and is fixedly connected to the left side of the base 1. A pump body 39 is fixedly connected to the outside of the first connecting pipe 35. An oil outlet pipe 32 is fixedly connected to the left side of the buffer cylinder 31. A three-way pipe 392 is fixedly connected to the left side of the oil outlet pipe 32. A second connecting pipe 393 is fixedly connected to the left side of the three-way pipe 392 and is fixedly connected to the top of the liquid storage tank 391.

[0032] The top of the spring 37 is fixedly connected to the top of the buffer cylinder 31, and the bottom of the spring 37 is fixedly connected to the top of the piston 38. A rubber pad is provided on the top of the connecting shaft 33 so that when the mounting seat 42 squeezes the connecting shaft 33 under the action of the spring 37, it can play a buffering role. The diameter of the piston 38 is smaller than the inner diameter of the buffer cylinder 31. The pump body 39 is fixedly connected to the top of the load-bearing frame 36 so that when the piston 38 moves downward in the buffer cylinder 31 to squeeze the hydraulic oil, the hydraulic oil can enter the oil outlet pipe 32 through the gap between the piston 38 and the buffer cylinder 31.

[0033] Two sets of buffer cylinders 31, connecting shafts 33, springs 37, pistons 38, oil inlet pipes 34, first connecting pipes 35, pump bodies 39, and oil outlet pipes 32 are provided. The two sets of buffer cylinders 31, connecting shafts 33, springs 37, pistons 38, oil inlet pipes 34, first connecting pipes 35, pump bodies 39, and oil outlet pipes 32 are symmetrically distributed on the right side of the three-way pipe 392, and the two sets of buffer cylinders 31 are symmetrically fixedly connected to the inside of the base 1. By setting two sets, the buffer balance can be improved.

[0034] Example 2

[0035] Please see Figure 1-6Furthermore, based on Embodiment 1, the die-casting mechanism 4 includes a mounting frame 41, which is fixedly connected to the top of the base 1. A hydraulic cylinder 43 is fixedly connected to the top of the mounting frame 41, and a mounting seat 42 is fixedly connected to the bottom of the hydraulic cylinder 43. The mounting seat 42 is located on the top of the connecting shaft 33, and an upper mold 45 is fixedly connected to the bottom of the mounting seat 42. The upper mold 45 is slidably connected to the lower mold 2. A limit rod 44 is slidably connected inside the mounting seat 42 and is fixedly connected to the top of the base 1. The bottom of the mounting seat 42 is in contact with the top of the connecting shaft 33, and a rubber pad is provided at the bottom of the mounting seat 42 to provide protection when the mounting seat 42 contacts the connecting shaft 33. Two limit rods 44 are provided, and the two limit rods 44 are slidably connected inside the mounting seat 42 to ensure the stability of the upper mold 45 when the mounting seat 42 moves.

[0036] In actual operation, when this device is used, when the material to be die-cast is in the lower mold 2, the hydraulic cylinder 43 drives the mounting base 42 and the upper mold 45 to move, and the mounting base 42 slides around the limit rod 44, so that the upper mold 45 moves into the lower mold 2. The material can then be die-cast under the action of the upper mold 45 and the lower mold 2. The limit rod 44 is fixedly connected to the top of the base 1. The setting of the two limit rods 44 can effectively limit the movement direction of the mounting base 42, ensure the accurate positioning of the upper mold 45 and the lower mold 2 during the mold closing process, and improve the quality and precision of the die-cast products.

[0037] When the mounting base 42 pushes the upper mold 45 down, the mounting base 42 contacts the connecting shaft 33 and compresses it, causing the connecting shaft 33 to move downwards. The piston 38 slides inside the buffer cylinder 31. At this time, the spring 37 deforms, providing initial cushioning and absorbing some of the impact force. Simultaneously, the sliding of the piston 38 inside the buffer cylinder 31 causes the hydraulic oil in the buffer cylinder 31 to enter the oil outlet pipe 32 through the gap between the piston 38 and the buffer cylinder 31. It then enters the reservoir 391 through the three-way pipe 392 and the second connecting pipe 393. Under the action of the hydraulic oil, it further provides hydraulic cushioning for the closing of the upper mold 45 and the lower mold 2. The effect greatly reduces the vibration and impact during the mold closing process, effectively protects the various parts of the die casting machine, and extends the service life of the equipment. Through the pump body 39 to deliver and control the hydraulic oil, the hydraulic pressure in the buffer cylinder 31 can be precisely adjusted, thereby realizing flexible adjustment of the buffer performance. Under different die casting process requirements, the working parameters of the pump body 39 can be adjusted according to the actual situation. When the mounting seat 42 moves upward, the spring 37 returns to its original position, which can reset the connecting shaft 33. The hydraulic oil in the reservoir 391 is transported back to the buffer cylinder 31 through the pump body 39 and the first connecting pipe 35 via the oil inlet pipe 34, realizing the recycling of hydraulic oil.

[0038] Two sets of symmetrically distributed buffer cylinders 31, connecting shafts 33, springs 37, pistons 38, oil inlet pipes 34, first connecting pipes 35, pump bodies 39, and oil outlet pipes 32 further enhance the stability and uniformity of the buffer, making the die-casting machine more balanced in the mold closing process. The pump body 39 used in this case can be connected to the same PLC control system for synchronous control and synchronous operation.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A hydraulic buffer device for the mold closing mechanism of a die-casting machine, comprising a base (1), characterized in that: The base (1) is fixedly connected to the top of the lower mold (2), the base (1) is provided with a hydraulic buffer mechanism (3), and the base (1) is provided with a die-casting mechanism (4). The hydraulic buffer mechanism (3) includes a buffer cylinder (31), which is fixedly connected to the inside of the base (1). A connecting shaft (33) is slidably connected inside the buffer cylinder (31). A piston (38) is fixedly connected to the bottom of the connecting shaft (33). The piston (38) is slidably connected inside the buffer cylinder (31). A spring (37) is sleeved around the connecting shaft (33). An oil inlet pipe (34) is fixedly connected to the bottom of the buffer cylinder (31). A first connecting pipe (35) is fixedly connected to the bottom of the oil inlet pipe (34). A liquid storage tank (391) is fixedly connected to the rear side. A load-bearing frame (36) is fixedly connected to the bottom of the liquid storage tank (391). The load-bearing frame (36) is fixedly connected to the left side of the base (1). A pump body (39) is fixedly connected to the periphery of the first connecting pipe (35). An oil outlet pipe (32) is fixedly connected to the left side of the buffer cylinder (31). A three-way pipe (392) is fixedly connected to the left side of the oil outlet pipe (32). A second connecting pipe (393) is fixedly connected to the left side of the three-way pipe (392). The second connecting pipe (393) is fixedly connected to the top of the liquid storage tank (391).

2. The hydraulic buffer device for the die-casting machine mold closing mechanism according to claim 1, characterized in that: The top of the spring (37) is fixedly connected to the top of the buffer cylinder (31), the bottom of the spring (37) is fixedly connected to the top of the piston (38), and a rubber pad is provided on the top of the connecting shaft (33).

3. The hydraulic buffer device for the die-casting machine mold closing mechanism according to claim 1, characterized in that: The piston (38) has a diameter smaller than the inner diameter of the buffer cylinder (31), and the pump body (39) is fixedly connected to the top of the load-bearing frame (36).

4. The hydraulic buffer device for the die-casting machine mold closing mechanism according to claim 1, characterized in that: The buffer cylinder (31), connecting shaft (33), spring (37), piston (38), oil inlet pipe (34), first connecting pipe (35), pump body (39) and oil outlet pipe (32) are provided in two sets. The two sets of buffer cylinder (31), connecting shaft (33), spring (37), piston (38), oil inlet pipe (34), first connecting pipe (35), pump body (39) and oil outlet pipe (32) are symmetrically distributed on the right side of the three-way pipe (392), and the two sets of buffer cylinder (31) are symmetrically fixedly connected to the inside of the base (1).

5. The hydraulic buffer device for the die-casting machine mold closing mechanism according to claim 1, characterized in that: The die-casting mechanism (4) includes a mounting frame (41), which is fixedly connected to the top of the base (1). A hydraulic cylinder (43) is fixedly connected to the top of the mounting frame (41), and a mounting seat (42) is fixedly connected to the bottom of the hydraulic cylinder (43). The mounting seat (42) is located on the top of the connecting shaft (33), and an upper mold (45) is fixedly connected to the bottom of the mounting seat (42). The upper mold (45) is slidably connected to the lower mold (2). A limit rod (44) is slidably connected inside the mounting seat (42), and the limit rod (44) is fixedly connected to the top of the base (1).

6. The hydraulic buffer device for the die-casting machine mold closing mechanism according to claim 5, characterized in that: The bottom of the mounting base (42) is in contact with the top of the connecting shaft (33), and a rubber pad is provided at the bottom of the mounting base (42).

7. The hydraulic buffer device for the die-casting machine mold closing mechanism according to claim 5, characterized in that: There are two limiting rods (44), and the two limiting rods (44) are slidably connected inside the mounting base (42).

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