Die ejection structure of large die-casting machine

Abstract

The utility model discloses a die ejection structure of a large die-casting machine, which belongs to the technical field of die-casting machines and comprises an ejector pin oil cylinder, a piston rod is arranged at the output end of the ejector pin oil cylinder, an ejector pin oil cylinder guide rod is connected to the end of the ejector pin oil cylinder, and the ejector pin oil cylinder guide rod and the piston rod are respectively arranged at two ends of the ejector pin oil cylinder. An ejector plate is arranged on the outer side of the ejector oil cylinder and provided with a plane perpendicular to the output direction of the ejector oil cylinder. According to the scheme, the problems that a piston rod in a traditional guide-rod-free ejection structure is prone to breakage, an ejector pin oil cylinder leaks oil and the like are effectively solved, and the service life of the structure is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of die-casting machines, in particular to a die ejection structure of a large die-casting machine. Background Art

[0002] The development of automotive integrated die-casting technology is driving the development of ultra-large die-casting machine technology. Ultra-large die-casting requires high system pressure and clamping force to die-cast large-sized, high-quality castings, and the corresponding molds will also be larger. During the mold change process, large molds also have higher requirements for mold ejection devices.

[0003] In the traditional mold ejection structure, the piston rod is directly connected to the template during the mold ejection process, which plays a role in bearing and guiding. Since the piston rod bears the entire gravity of the ejector plate and is unevenly stressed during movement, the cylinder sags severely during operation, causing the ejector plate to tilt and shake up and down during ejection. At the same time, long-term operation causes serious friction and wear between the upper surface of the piston rod and the inner diameter of the cylinder, and the operating stability of the ejector plate is greatly reduced after a certain period of operation. Due to the poor operating stability of the ejection structure, the connection between the piston rod and the template is easy to loosen, and may even cause the piston rod of the ejector cylinder to break during operation. The tilting of the cylinder during operation and long-term wear lead to widespread oil leakage in the cylinder of this structure.

[0004] In order to solve the above problems, the prior art provides many technical solutions, such as US20240051205A1, which discloses an injection molding tool, which includes two mold parts, and the two mold parts are arranged to move relative to each other between a closed position and an open position along the tool axis. The injection molding tool includes a first mold core having a mounting end and a core end. Each of the two mold parts forms a mold cavity and a socket in the closed position, and the mold cavity and the socket are suitable for keeping the mounting end between the two mold parts and for releasing the mounting end in the open position. The core end of the first mold core in the closed position extends from the mounting end along the core axis and extends into the mold cavity in a transverse direction relative to the direction of the tool axis, so that the mold cavity forms a tubular space extending axially along the core axis between the two mold parts and the core end of the mold core part, but the technical solution still has room for improvement in terms of the force dispersion of the overall structure during the mold ejection process. Utility Model Content

[0005] The utility model aims to provide a mold ejection structure for a large die-casting machine, so as to solve the problems in the prior art that the ejection piston rod is overloaded, easily damaged and has loose connection.

[0006] In order to solve the above technical problems, the utility model specifically provides the following technical solutions: a mold ejection structure of a large die-casting machine, comprising an ejector cylinder, a piston rod is arranged at the output end of the ejector cylinder, an ejector cylinder guide rod is connected to the end of the ejector cylinder, the ejector cylinder guide rod and the piston rod are respectively arranged at the two ends of the ejector cylinder, wherein an ejector plate is arranged on the outside of the ejector cylinder, and the ejector plate has a plane perpendicular to the output direction of the ejector cylinder. The utility model provides an ejector cylinder guide rod at the end of the ejector cylinder, which can guide the mold during the mold opening and closing process through the ejector cylinder guide rod, so that the two molds can move along the piston rod and the ejector cylinder guide rod, and the force of the ejector cylinder can be dispersed to the ejector cylinder guide rod, thus reducing the weight of the piston rod and the ejector cylinder, so as to reduce or avoid the phenomenon of tilting and shaking of the ejection mold caused by the weight of the piston rod and the ejector cylinder during the mold ejection process. Furthermore, by providing an ejector plate, the piston rod and the ejector cylinder guide rod are fixed during the mold ejection process, and the ejector plate and the ejector cylinder barrel move to push the mold to complete the ejection action. In this way, the force is further dispersed to the ejector plate during the mold ejection process, and the contact surface during the ejection process is increased by the ejector plate, thereby avoiding the problem of repeated friction between the piston rod and the inner diameter of the cylinder barrel and looseness of the connection between the piston rod and the template in the prior art, which may cause the piston rod to break.

[0007] According to an embodiment of the utility model, the ejector oil cylinder guide rod is connected to the ejector oil cylinder through an end cover, the end cover has a convex ring, the ejector oil cylinder has an installation space corresponding to the convex ring of the end cover, and the end cover can be detachably connected to the ejector oil cylinder. The ejector oil cylinder guide rod and the ejector oil cylinder are installed and limited by setting the end cover, and the end cover and the installation space on the ejector oil cylinder are installed to achieve coaxial assembly of the two. The end cover is provided with a through hole that can pass the ejector oil cylinder guide rod and is coaxially arranged with the ejector oil cylinder guide rod, so that the ejector oil cylinder guide rod can be coaxially arranged with the ejector oil cylinder, ensuring that the two molds can move along the piston rod and the ejector oil cylinder guide rod during the subsequent film closing and mold opening process, that is, ensuring the accuracy of mold opening and film closing.

[0008] According to an embodiment of the utility model, the piston rod is connected to the ejector cylinder through an end cover, the end cover has a convex ring, the ejector cylinder has an installation space corresponding to the convex ring of the end cover, and the end cover can be detachably connected to the ejector cylinder. The piston rod and the ejector cylinder are installed and limited by setting the end cover, and the end cover and the installation space on the ejector cylinder are installed to achieve coaxial assembly of the two. The end cover is provided with a through hole that can pass the piston rod and is coaxially arranged with the piston rod, so that the piston rod and the ejector cylinder can be coaxially arranged, ensuring that the two molds can move along the piston rod and the ejector cylinder guide rod during the subsequent film closing and mold opening process, that is, ensuring the accuracy of mold opening and film closing.

[0009] According to an embodiment of the utility model, the end surface of the rear template has a groove body capable of accommodating the ejector oil cylinder, and the groove body is connected with the through groove for accommodating the ejector oil cylinder guide rod. The ejector oil cylinder guide rod is arranged on the rear template, and the rear template has a through groove capable of accommodating the ejector oil cylinder guide rod, so that the gravity of the rear template can be dispersed, so that the force on the ejector oil cylinder is reduced, and the ejector oil cylinder can move along the ejector oil cylinder guide rod relative to the rear template during the process of opening and closing the mold, playing a guiding role, so that the parts can run smoothly and smoothly during the process of opening and closing the mold, and there is no problem of uneven force on the piston rod, which can reduce the probability of damage to the piston rod.

[0010] According to one embodiment of the utility model, the end of the piston rod is connected to the movable template via a fastener, and the movable template has an installation cavity capable of accommodating the end of the piston rod, and a first assembly hole is provided in the installation cavity. The fastener can be connected to the end of the piston rod through the first assembly hole, and the fastener includes but is not limited to screws, bolts and other connecting parts. The end of the piston rod can be fixed to the movable template via the fastener, and the pushing contact is achieved by using an ejector plate and an ejector cylinder, thereby solving the problem in the prior art that the connection between the piston rod and the template is easy to loosen and may even cause the piston rod to break.

[0011] According to one embodiment of the utility model, at least one ejector plate guide rod is provided on the side of the ejector plate, and the axis of the ejector plate guide rod is perpendicularly arranged to the side of the ejector plate, and the ejector plate guide rod can abut or be fixedly connected to the surface of the movable template. The axis of the ejector plate guide rod is arranged parallel to the axis of the piston rod. The surface of the movable template is provided with a plane in contact with the end of the ejector plate guide rod. The ejector plate guide rod is arranged to share the force of the ejector plate and the ejector cylinder, thereby reducing the weight of the piston rod and making the force evenly distributed.

[0012] According to one embodiment of the utility model, the ejector cylinder guide rod is coaxially arranged with the piston rod. By arranging the ejector cylinder guide rod and the piston rod in a coaxial manner, the possibility of the piston rod generating an axial tilt during operation is avoided or reduced, thereby ensuring that the two molds can move along the piston rod and the ejector cylinder guide rod during subsequent film closing and mold opening, thereby ensuring the accuracy of mold opening and film closing.

[0013] Compared with the prior art, the utility model has the following beneficial effects: compared with the traditional ejection structure without guide rods, the ejection action of the structure runs more smoothly, the four guide rods share the gravity that the original piston has to bear, avoids the phenomenon that the ejector plate and the ejector cylinder are tilted downward as a whole, effectively solves the problems of easy breakage of the piston rod and oil leakage of the ejector cylinder in the traditional ejection structure without guide rods, and prolongs the service life of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0015] Figure 1 This is a schematic diagram of the application state of a mold ejection structure of a large die-casting machine of the utility model;

[0016] Figure 2 This is a schematic diagram of a die ejection structure scheme of a large die-casting machine of the utility model;

[0017] Figure 3 For attachment Figure 2 A partial enlarged view of part C shown in FIG.

[0018] Figure 4 This is a schematic diagram of the connection scheme between the piston rod and the ejector plate of the utility model;

[0019] Figure 5 This is a partial enlarged view of the connection scheme between the piston rod and the ejector plate of the utility model.

[0020] Explanation of the reference numerals: 1- ejector plate; 2- ejector plate guide rod; 3- ejector cylinder guide rod; 4- piston rod; 5- movable template; 501- first assembly hole; 6- ejector cylinder; 7- end cover; 8- rear template. DETAILED DESCRIPTION

[0021] 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.

[0022] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0023] Embodiment 1

[0024] See attached Figure 1-Figure 5As shown, a mold ejection structure of a large die-casting machine includes an ejector cylinder 6, a piston rod 4 is arranged at the output end of the ejector cylinder 6, an ejector cylinder guide rod 3 is connected to the end of the ejector cylinder 6, the ejector cylinder guide rod 3 and the piston rod 4 are respectively arranged at the two ends of the ejector cylinder 6, wherein an ejector plate 1 is arranged on the outside of the ejector cylinder 6, and the ejector plate 1 has a plane perpendicular to the output direction of the ejector cylinder 6. The utility model provides an ejector cylinder guide rod 3 at the end of the ejector cylinder 6, which can guide the mold during the mold opening and closing process through the ejector cylinder guide rod 3, so that the two molds can move along the piston rod 4 and the ejector cylinder guide rod 3, and the force of the ejector cylinder 6 can be dispersed to the ejector cylinder guide rod 3, thus reducing the weight of the piston rod 4 and the ejector cylinder 6, so as to reduce or avoid the phenomenon of tilting and shaking of the ejection mold caused by the weight of the piston rod 4 and the ejector cylinder 6 during the ejection of the mold. Furthermore, by providing the ejector plate 1, the piston rod 4 and the ejector cylinder guide rod 3 are fixed during the ejection of the mold, and the ejector plate 1 and the ejector cylinder barrel 6 move to push the mold to complete the ejection action. In this way, the force is further dispersed to the ejector plate 1 during the ejection of the mold, and the contact surface during the ejection process is increased by the ejector plate 1, thereby avoiding the problem that the piston rod may be broken due to repeated friction between the piston rod and the inner diameter of the cylinder barrel and the loose connection between the piston rod and the template in the prior art.

[0025] The ejector oil cylinder guide rod 3 is connected to the ejector oil cylinder 6 through the end cover 7. The end cover 7 has a convex ring. The ejector oil cylinder 6 has an installation space corresponding to the convex ring of the end cover 7. The end cover 7 can be detachably connected to the ejector oil cylinder 6. The ejector oil cylinder guide rod 3 and the ejector oil cylinder 6 are installed and limited by setting the end cover 7. The end cover 7 is installed in the installation space on the ejector oil cylinder 6 to achieve coaxial assembly of the two. The end cover 7 is provided with a through hole that can pass through the ejector oil cylinder guide rod 3 and is coaxially arranged with the ejector oil cylinder guide rod 3. In this way, the ejector oil cylinder guide rod 3 and the ejector oil cylinder 6 can be coaxially arranged, ensuring that the two molds can move along the piston rod 4 and the ejector oil cylinder guide rod 3 during the subsequent film closing and mold opening process, that is, ensuring the accuracy of mold opening and film closing.

[0026] The piston rod 4 is connected to the ejector cylinder 6 through the end cover 7. The end cover 7 has a convex ring. The ejector cylinder 6 has an installation space corresponding to the convex ring of the end cover 7. The end cover 7 can be detachably connected to the ejector cylinder 6. The piston rod 4 and the ejector cylinder 6 are installed and limited by setting the end cover 7. The end cover 7 is installed in the installation space on the ejector cylinder 6 to achieve coaxial assembly of the two. The end cover 7 is provided with a through hole that can pass the piston rod 4 and is coaxially arranged with the piston rod 4. In this way, the piston rod 4 and the ejector cylinder 6 can be coaxially arranged, ensuring that the two molds can move along the piston rod 4 and the ejector cylinder guide rod 3 during the subsequent film closing and mold opening process, that is, ensuring the accuracy of mold opening and film closing.

[0027] The end surface of the rear template 8 has a groove body capable of accommodating the ejector cylinder 6, and the groove body is connected with the through groove for accommodating the ejector cylinder guide rod 3. The ejector cylinder guide rod 3 is arranged on the rear template 8, and the rear template 8 has a through groove capable of accommodating the ejector cylinder guide rod 3, so that the gravity of the rear template 8 can be dispersed, so that the force of the ejector cylinder 6 is reduced, and the ejector cylinder 3 can move along the ejector cylinder guide rod 3 relative to the rear template 8 during the process of mold opening and film closing, playing a guiding role, so that the parts can run smoothly and smoothly during the process of mold opening and film closing, and there is no problem of uneven force on the piston rod 4, which can reduce the probability of damage to the piston rod 4.

[0028] At least one ejector plate guide rod 2 is provided on the side of the ejector plate 1, and the axis of the ejector plate guide rod 2 is perpendicular to the side of the ejector plate 1. The ejector plate guide rod 2 can abut or be fixedly connected to the surface of the movable template 5. The axis of the ejector plate guide rod 2 is parallel to the axis of the piston rod 4. The surface of the movable template 5 is provided with a plane that contacts the end of the ejector plate guide rod 2. The ejector plate guide rod 2 is provided to share the force of the ejector plate 1 and the ejector cylinder 6, thereby reducing the weight of the piston rod 4 and making the force evenly distributed.

[0029] The ejector cylinder guide rod 3 is coaxially arranged with the piston rod 4. By arranging the ejector cylinder guide rod 3 and the piston rod 4 in a coaxial manner, the possibility of the piston rod 4 generating axial tilt during operation is avoided or reduced, thereby ensuring that the two molds can move along the piston rod 4 and the ejector cylinder guide rod 3 during the subsequent film closing and mold opening processes, thereby ensuring the accuracy of mold opening and film closing.

[0030] Embodiment 2:

[0031] This implementation is based on the solution of Example 1, see the attached Figure 3 As shown, the end of the piston rod 4 is connected to the movable template 5 through a fastener. The movable template 5 has an installation cavity that can accommodate the end of the piston rod 4. A first assembly hole 501 is opened in the installation cavity. The fastener 501 can be connected to the end of the piston rod 4 through the first assembly hole 501. The fastener includes but is not limited to screws, bolts and other connecting parts. The end of the piston rod 4 can be fixed to the movable template 5 through the fastener, and the pushing contact is achieved by using the ejector plate 1 and the ejector cylinder 6. This solves the problem in the prior art that the connection between the piston rod 4 and the template is easy to loosen and may even cause the piston rod to break.

[0032] The movable template 5 is connected to the end of the piston rod 4 through an M42 cup head screw, see the attached Figure 4 As shown, one end of the piston rod 4 is connected to the ejector cylinder guide rod 3 through an M10 cup head screw, and the ejector cylinder barrel 6 is fixed to the ejector plate 1 through the ejector cylinder front end cover 7 and the M24 cup head screw.

[0033] In this embodiment, the ejector cylinder 6 is a double-rod piston cylinder.

[0034] In this embodiment, the mold ejection workflow is as follows: during the ejection structure operation, an ejection signal is given after the mold is opened, and the ejector cylinder 6 performs an ejection action. The ejector plate guide rod 2 and the piston rod 4 are fixed on the movable template 5, and the front end of the ejector cylinder guide rod 3 is connected to the piston rod 4 and the rear end passes through the rear template 8 for fixation. During the ejection process, the ejector plate guide rod 2, the piston rod 4, and the ejector cylinder guide rod 3 are fixed, and the ejector plate 1 and the ejector cylinder barrel 6 move to complete the ejection action.

[0035] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the utility model, and are not intended to limit the implementation methods of the technology of the utility model in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the utility model, but they should still be regarded as technologies or embodiments that are essentially the same as the utility model.

[0036] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A mold ejection structure of a large die-casting machine, comprising an ejector cylinder (6), wherein a piston rod (4) is arranged at an output end of the ejector cylinder (6), and characterized in that: The end of the ejector cylinder (6) is connected to an ejector cylinder guide rod (3), and the ejector cylinder guide rod (3) and the piston rod (4) are respectively arranged at the two ends of the ejector cylinder (6). Wherein, an ejector plate (1) is provided on the outside of the ejector cylinder (6), and the ejector plate (1) has a plane perpendicular to the output direction of the ejector cylinder (6).

2. The mold ejection structure of a large die-casting machine according to claim 1, characterized in that: The ejector cylinder guide rod (3) is connected to the ejector cylinder (6) via an end cover (7); the end cover (7) has a convex ring; the ejector cylinder (6) has an installation space corresponding to the convex ring of the end cover (7); and the end cover (7) can be detachably connected to the ejector cylinder (6).

3. The mold ejection structure of a large die-casting machine according to claim 1, characterized in that: The piston rod (4) is connected to the ejector cylinder (6) via an end cover (7); the end cover (7) has a convex ring; the ejector cylinder (6) has an installation space corresponding to the convex ring of the end cover (7); and the end cover (7) can be detachably connected to the ejector cylinder (6).

4. The mold ejection structure of a large die-casting machine according to claim 1, characterized in that: The ejector oil cylinder guide rod (3) is arranged on a rear template (8), and the rear template (8) has a through groove capable of accommodating the ejector oil cylinder guide rod (3).

5. The mold ejection structure of a large die-casting machine according to claim 4, characterized in that: The end surface of the rear template (8) has a groove body capable of accommodating the ejector cylinder (6), and the groove body is interlinked with a through groove for accommodating the ejector cylinder guide rod (3).

6. The mold ejection structure of a large die-casting machine according to claim 1, characterized in that: The end of the piston rod (4) is connected to a movable template (5) via a fastener, the movable template (5) having a mounting cavity capable of accommodating the end of the piston rod (4), a first assembly hole (501) being provided in the mounting cavity, and the fastener can be connected to the end of the piston rod (4) via the first assembly hole (501).

7. The mold ejection structure of a large die-casting machine according to claim 6, characterized in that: At least one ejector plate guide rod (2) is arranged on the side of the ejector plate (1), the axis of the ejector plate guide rod (2) is arranged perpendicular to the side of the ejector plate (1), and the ejector plate guide rod (2) can abut against or be fixedly connected to the surface of the movable template (5).

8. The mold ejection structure of a large die-casting machine according to claim 7, characterized in that: The axis of the ejector plate guide rod (2) is arranged parallel to the axis of the piston rod (4).

9. The mold ejection structure of a large die-casting machine according to claim 7, characterized in that: The surface of the movable template (5) is provided with a plane that contacts the end of the ejector plate guide rod (2).

10. The mold ejection structure of a large die-casting machine according to claim 1, characterized in that: The ejector cylinder guide rod (3) and the piston rod (4) are coaxially arranged.

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