Injection system and large-tonnage die-casting machine

Abstract

The present application relates to an injection molding system and a large-tonnage die-casting machine, comprising a three-cavity injection cylinder, a first power unit, a second power unit, and a third power unit. The three-cavity injection cylinder is provided with a first drive chamber, a second drive chamber, and a third drive chamber. The first drive chamber is connected to the first power unit, the second drive chamber is connected to the second power unit, and the third drive chamber is connected to the third power unit. A first piston is provided in the first drive chamber. The first power unit is used to drive the first piston in the first drive chamber to move. The second power unit is used to drive the second piston in the second drive chamber to move at a second speed. The third power unit is used to drive the third piston in the third drive chamber to move at a third speed. The second speed is less than the third speed. The third drive chamber is located at the bottom of the three-cavity injection cylinder. By utilizing the third drive chamber in the three-cavity injection cylinder to achieve high-speed drive while utilizing the second drive chamber to achieve low-speed and precise drive, the accuracy of the injection molding system's melt injection is improved.

Description

Technical Field

[0001] This specification relates to the technical field of die-casting machines, and in particular to an injection system and a large-tonnage die-casting machine. Background Art

[0002] At present, the 6100-ton horizontal die-casting machine has the following technical features:

[0003] 1) The low-speed precision speed of the injection system is 0.03m / s, which is stable and has no creeping phenomenon. The high-speed injection speed is 8.5-10m / s. When the cavity is filled, the brake is applied in real time to avoid the generation of flash.

[0004] 2) The clamping mechanism adopts a 5-point 4 / 5 toggle system with a floating toggle pin. The entire toggle system adopts point-to-point automatic lubrication to ensure smooth operation and longer life.

[0005] 3) Other features include the movable mold core accumulator, the main bar material is 39NiCrMo3UNIEN10083 / 1, hardened and tempered, chrome plating thickness is 0.15mm, and the thread is formed by cold extrusion.

[0006] In addition, the existing technology uses integral die-casting to realize the integral die-casting of the aluminum body in the center cabin process, and its process characteristics are as follows:

[0007] 1) Use all-around feeding (see Figure 118 below for the feeding port) for casting.

[0008] 2) Use high-tonnage clamping around the periphery and on the top to lock and open the parts.

[0009] However, the above-mentioned crank system and its horizontal structure cannot be used to complete the above-mentioned integral die-casting of the aluminum body. The specific reasons are as follows:

[0010] 1) Due to the inherent inability of horizontal structures to produce large-tonnage die-casting machines, this is mainly due to the unbalanced force acting on the large bar, the difficulty in manufacturing large-diameter bars that are twisted, the difficulty in ensuring accuracy, and the difficulty in ensuring dynamic and static loads.

[0011] 2) It is impossible to achieve sealing and controllable properties by dividing the mold into 5 sides, especially the mechanical locking of the connecting rod, so the above-mentioned integral die-casting of the aluminum body is difficult to achieve.

[0012] In addition, the injection system of the existing die-casting machine is commonly a single drive cavity injection structure, which realizes the melt injection of the die-casting machine through high-speed injection, but the above structure cannot achieve precise control of the injection speed according to needs. Summary of the Invention

[0013] In response to the above-mentioned problems in the prior art, the present application provides an injection system and a large-tonnage die-casting machine, which improves the injection accuracy of the melt by utilizing the third drive cavity in the three-cavity injection cylinder to achieve high-speed drive while utilizing the second drive cavity to achieve low-speed precision drive.

[0014] To achieve the above objectives, this specification provides the following solutions:

[0015] A shot injection system includes: a three-cavity shot cylinder, a first power device, a second power device, and a third power device. The three-cavity shot cylinder is provided with a first drive chamber, a second drive chamber, and a third drive chamber. The first drive chamber is communicated with the first power device, the second drive chamber is communicated with the second power device, and the third drive chamber is communicated with the third power device. A first piston is provided in the first drive chamber. The first power device is used to drive the first piston in the first drive chamber to move. The second power device is used to drive the second piston in the second drive chamber to move at a second speed. The third power device is used to drive the third piston in the third drive chamber to move at a third speed. The second speed is less than the third speed. The third drive chamber is located at the bottom of the three-cavity shot cylinder.

[0016] Optionally, the first power device is used to drive the first piston to move from outside the cavity of the first drive cavity to inside the cavity, so as to assist in driving the third piston to retreat, or to assist in adjusting the second speed and the third speed.

[0017] Optionally, the first driving cavity and the second driving cavity are both located on the side of the three-cavity injection cylinder.

[0018] Optionally, the first driving chamber is provided at the upper portion of the three-cavity shot cylinder, and the second driving chamber is provided at the middle portion of the three-cavity shot cylinder.

[0019] Optionally, the third driving cavity is arranged in a vertical horizontal plane.

[0020] Optionally, the moving direction of the first piston in the first driving chamber is perpendicular to a horizontal plane, and the moving direction of the second piston in the second driving chamber is perpendicular to a horizontal plane.

[0021] On the other hand, the present application also provides a large-tonnage vertical die-casting machine, including a mold clamping system and the above-mentioned injection system, the mold clamping system includes an upper crossbeam, a lower crossbeam, multiple columns and a workbench, the upper crossbeam and the lower crossbeam are fixedly connected by the multiple columns, the workbench is arranged on the lower crossbeam, the workbench includes a first connecting part for connecting to the mold, the injection system is arranged at the bottom of the lower crossbeam, and the three-cavity injection cylinder vertically passes through the workbench.

[0022] Optionally, the mold closing system further includes a slider, a plunger cylinder is provided in the upper crossbeam, the slider is connected to the plunger cylinder, the plunger cylinder is used to drive the slider to move up and down, and the slider includes a second connecting portion for connecting to the upper mold.

[0023] Optionally, a main oil cylinder is further provided in the upper crossbeam, the plunger cylinder is connected to the main oil cylinder, and the main oil cylinder is used to drive the slider to move downward to close the mold through the plunger cylinder.

[0024] Optionally, a pull rod is further included, wherein the pull rod is connected to the slider, and the pull rod is used to drive the slider to move upward to open the mold.

[0025] Optionally, a shot channel is provided on the top of the three-cavity shot cylinder, and the shot channel is used to communicate with the feed port of the mold.

[0026] Optionally, a vacuum pumping device is further included, and the vacuum pumping device is provided with an interface for docking with a vacuum valve interface on the mold.

[0027] Optionally, the first connecting portion is a T-slot, and the first connecting portion is used for sliding connection with the lower mold.

[0028] Optionally, the second connecting portion is a T-slot, and the second connecting portion is used for sliding connection with the upper mold.

[0029] Optionally, a guide rail is provided on the lower surface of the upper beam, and the slider is provided with a first connecting member, which is slidably connected to the guide rail.

[0030] Optionally, a slider locking device is further included, wherein the slider locking device is provided on the column and is used to lock the slider when the slider is located at a preset position.

[0031] Optionally, the first power unit, the second power unit and the third power unit are all driven by hydraulic power.

[0032] Optionally, a slider driving device is further included, which is connected to the slider and is used to drive the slider to move on the guide rail to drive the upper mold to move synchronously on the guide rail.

[0033] Optionally, a displacement sensor is provided on the slider, and the displacement sensor is used to detect the movement stroke of the slider.

[0034] According to the specific embodiments provided in this specification, this application has the following technical effects:

[0035] 1) This specification provides an injection molding system and a large-tonnage die-casting machine, which improves the accuracy of melt injection of the injection molding system by utilizing the third drive cavity of a three-cavity injection cylinder to achieve high-speed drive while utilizing the second drive cavity to achieve low-speed precision drive;

[0036] 2) This application targets large-tonnage die-casting machines. By adopting a vertical structure, the force applied to multiple columns is uniform, thereby enabling the columns in the equipment to have a minimum diameter, thereby reducing the size requirements of the columns. By locating the injection system at the bottom of the die-casting machine and injecting the melt into the mold from bottom to top, the thermal insulation and exhaust performance of the melt can be improved. The use of longitudinal die-casting makes low-speed injection molding possible. By combining the high-speed injection of the injection system, ultra-thin-walled parts can be produced, reducing weight and improving product quality.

[0037] 3) Through the vacuum pumping device, the vacuum valve interface of the mold is connected to the vacuum pumping device during production, so as to achieve the required vacuum degree for casting;

[0038] 4) This application has the characteristics of high speed, high efficiency, flexible control parameters, and the ability to produce ultra-thin-wall parts. It can be easy to manufacture, easy to operate and maintain, and reduce the cost of use. The equipment should have good system rigidity and high precision, long life, and high reliability.

[0039] 5) Through the cooperation of the slider and the module, this application can achieve the production of multiple vehicle parts with the same mold, reducing development costs and saving mold resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] To more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0041] Figure 1 This is a structural diagram of a large-tonnage die-casting machine provided in this manual.

[0042] Figure 2 This is a structural diagram of an injection system provided in this manual.

[0043] Among them, the reference numerals in the figure correspond to:

[0044] 1-three-cavity injection cylinder, 11-first driving cavity, 12-second driving cavity, 13-third driving cavity, 2-upper beam, 3-lower beam, 4-column, 5-upper mold, 6-lower mold. DETAILED DESCRIPTION

[0045] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0046] The purpose of this specification is to provide an injection system and a large-tonnage die-casting machine, which improves the injection accuracy of the melt by utilizing the third drive cavity in the three-cavity injection cylinder to achieve high-speed drive while utilizing the second drive cavity to achieve low-speed precision drive.

[0047] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0048] This specification provides a large-tonnage die-casting machine, including a mold clamping system and an injection system. The mold clamping system includes an upper crossbeam 2, a lower crossbeam 3, multiple columns 4, and a workbench. The upper crossbeam 2 and the lower crossbeam 3 are fixedly connected by the multiple columns 4. The workbench is arranged on the lower crossbeam 3 and includes a first connection portion for connecting to a mold. The injection system is arranged at the bottom of the lower crossbeam 3, and a three-cavity injection cylinder 1 vertically passes through the workbench. This embodiment discloses a large-tonnage die-casting machine. For large tonnage, a vertical structure is adopted to make the force uniform on multiple columns, thereby allowing the diameter of the columns in the equipment to adopt a minimum diameter, that is, reducing the size requirements of the columns. By arranging the injection system at the bottom of the die-casting machine, the injection system injects the melt into the mold from bottom to top, which can improve the heat preservation and exhaust performance of the melt. The longitudinal die-casting method makes low-speed injection molding possible. By cooperating with the high-speed injection of the injection system, ultra-thin-walled parts can be produced, reducing weight and improving product quality.

[0049] In one possible embodiment, the mold clamping system further includes a slider, a plunger cylinder is disposed within the upper crossbeam 2, the slider being connected to the plunger cylinder, the plunger cylinder being used to drive the slider up and down, and the slider including a second connection portion for connecting to the upper mold 5. Through the coordination of the slider and the module, the present application enables the production of multiple vehicle parts using the same mold, reducing development costs and conserving mold resources.

[0050] In a possible embodiment, a main oil cylinder is further provided in the upper crossbeam 2 , and the plunger cylinder is connected to the main oil cylinder. The main oil cylinder is used to drive the slider to move downward to close the mold through the plunger cylinder.

[0051] In a possible embodiment, a pull rod is further included, which is connected to the slider and is used to drive the slider to move upward to open the mold.

[0052] In a possible embodiment, a shot channel is provided on the top of the three-cavity shot cylinder 1 , and the shot channel is used to communicate with the feed port of the mold.

[0053] In one possible embodiment, a vacuum pumping device is further included, having an interface for docking with a vacuum valve interface on the mold. The vacuum pumping device is used to dock the vacuum valve interface of the mold during production, thereby achieving the desired casting vacuum level. By installing the vacuum pumping device within the die-casting machine, once the mold is assembled, vacuuming can be performed by simply docking the vacuum pumping device interface with the vacuum valve interface on the mold, providing convenient operation.

[0054] In a possible embodiment, the first connecting portion may be a T-slot, and the first connecting portion is used for sliding connection with the lower mold 6 .

[0055] In a possible embodiment, the second connection portion may be a T-slot, and the second connection portion is used for sliding connection with the upper mold 5 .

[0056] In a possible embodiment, a guide rail is provided on the lower surface of the upper crossbeam 2 , and the slider is provided with a first connecting member, which is slidably connected to the guide rail.

[0057] In one possible embodiment, a slider locking device is further included. The slider locking device is mounted on the column 4 and is used to lock the slider when it is in a preset position. Each column is provided with a slider locking device. When the press is not in operation and the slider is stopped at the upper limit position or the preset position, the locking device locks the slider to prevent it from accidentally falling.

[0058] In one possible embodiment, the first, second, and third power units are all hydraulically driven. The hydraulic system consists of an energy conversion device (oil pump), a hydraulic control device (including an integrated valve block and its associated control valves), auxiliary equipment (including an oil tank, cooling system, circulating filtration system, and piping), hydraulic accessories (such as oil filters, flanges, joints, and piping), a hydraulic actuator (oil cylinder), and various connecting pipelines. This system meets process requirements such as low-speed control, balance control, and pressure maintenance control.

[0059] In a possible embodiment, a slider driving device is further included, which is connected to the slider and is used to drive the slider to move on the guide rail to drive the upper mold 5 to move synchronously on the guide rail.

[0060] In one possible embodiment, a displacement sensor is provided on the slider to detect the movement of the slider. The displacement sensor on the slider cooperates with a limit switch to ensure that the slider operates safely within the range of travel by detecting the movement of the slider.

[0061] On the other hand, this specification also provides an injection molding system for injecting a melt into a mold by injection molding so that a die casting machine can form a die-casting part. The injection molding system includes a three-cavity injection cylinder 1, a first power unit, a second power unit, and a third power unit. The three-cavity injection cylinder 1 is provided with a first drive chamber 11, a second drive chamber 12, and a third drive chamber 13. The first drive chamber 11 is connected to the first power unit, the second drive chamber 12 is connected to the second power unit, and the third drive chamber 13 is connected to the third power unit. A first piston is provided in the first drive chamber 11. The first power unit is used to drive the first piston in the first drive chamber 11 to move. The second power unit is used to drive the second piston in the second drive chamber 12 to move at a second speed. The third power unit is used to drive the third piston in the third drive chamber 13 to move at a third speed, the second speed being less than the third speed. The third drive chamber 13 is located at the bottom of the three-cavity injection cylinder 1. The movement of the first, second, and third pistons toward the interior of the three-cavity injection cylinder drives the melt in the three-cavity injection cylinder to move from the three-cavity injection cylinder toward the mold. By utilizing the third driving chamber in the three-chamber injection cylinder to achieve high-speed drive while utilizing the second driving chamber to achieve low-speed and precise drive, the accuracy of melt injection of the injection system is improved.

[0062] In one possible embodiment, the first power device is used to drive the first piston to move from outside the first drive chamber 11 to inside the chamber, so as to assist in driving the third piston to retreat, or to assist in adjusting the second speed and the third speed. When the three-cavity shot cylinder is in the process of upwardly ejecting the melt, the first power device can be used to drive the first piston to move from outside the first drive chamber to inside the chamber. At this time, the pressure in the shot cylinder increases with the movement of the first piston. Due to the increase in the pressure in the chamber, the movement speeds of the pistons in the second and third drive chambers can be relatively reduced. That is, the cooperation between the first power device and the first drive chamber plays a role in adjusting the injection speed during injection. When the three-cavity shot cylinder is in the process of downwardly retreating, the first power device can be used to drive the first piston to move from outside the first drive chamber to inside the chamber. At this time, the pressure in the shot cylinder increases with the movement of the first piston. Due to the increase in the pressure in the chamber, the retreat speed of the piston in the first drive chamber can be relatively increased, playing a role in assisting the first piston to accelerate the retreat.

[0063] In a possible embodiment, the first driving chamber 11 and the second driving chamber 12 are both located on the side of the three-cavity shooting cylinder 1 .

[0064] In a possible embodiment, the first driving chamber 11 is provided at the upper portion of the three-cavity shot cylinder 1 , and the second driving chamber 12 is provided at the middle portion of the three-cavity shot cylinder 1 .

[0065] In a possible implementation, the third driving cavity 13 is arranged in a vertical horizontal plane.

[0066] In a possible embodiment, the moving direction of the first piston in the first driving chamber 11 is perpendicular to the horizontal plane, and the moving direction of the second piston in the second driving chamber 12 is perpendicular to the horizontal plane.

[0067] The above embodiments have the following technical effects:

[0068] 1) This specification provides an injection molding system and a large-tonnage die-casting machine, which improves the accuracy of melt injection of the injection molding system by utilizing the third drive cavity of a three-cavity injection cylinder to achieve high-speed drive while utilizing the second drive cavity to achieve low-speed precision drive;

[0069] 2) This application targets large-tonnage parts by adopting a vertical structure to evenly distribute the forces on multiple columns, thereby enabling the columns in the equipment to have the smallest diameters, thus reducing the required column sizes. By locating the injection molding system at the bottom of the die-casting machine and injecting the melt into the mold from bottom to top, the melt's thermal insulation and exhaust performance can be improved. The use of longitudinal die-casting enables low-speed injection molding. The high-speed injection of the injection molding system can produce ultra-thin-walled parts, reducing weight and improving product quality.

[0070] 3) Through the vacuum pumping device, the vacuum valve interface of the mold is connected to the vacuum pumping device during production, so as to achieve the required vacuum degree for casting;

[0071] 4) This application has the characteristics of high speed, high efficiency, flexible control parameters, and the ability to produce ultra-thin-wall parts. It can be easy to manufacture, easy to operate and maintain, and reduce the cost of use. The equipment should have good system rigidity and high precision, long life, and high reliability.

[0072] 5) Through the cooperation of the slider and the module, this application can achieve the production of multiple vehicle parts with the same mold, reducing development costs and saving mold resources.

[0073] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A shot injection system, characterized in that: The invention comprises a three-cavity injection cylinder (1), a first power device, a second power device and a third power device, wherein the three-cavity injection cylinder (1) is provided with a first drive cavity (11), a second drive cavity (12) and a third drive cavity (13). The first driving chamber (11) is in communication with the first power device, the second driving chamber (12) is in communication with the second power device, and the third driving chamber (13) is in communication with the third power device. A first piston is provided in the first driving chamber (11). The first power device is used to drive the first piston in the first driving chamber (11) to move. The second power device is used to drive the second piston in the second driving chamber (12) to move at a second speed. The third power device is used to drive the third piston in the third driving chamber (13) to move at a third speed. The second speed is less than the third speed. The third driving chamber (13) is located at the bottom of the three-cavity injection cylinder (1). The first power device is used to drive the first piston to move from outside the first drive chamber (11) to inside the first drive chamber when the three-cavity injection cylinder (1) is in the process of upwardly injecting the melt, so as to relatively reduce the moving speeds of the second drive chamber and the third drive chamber.

2. The injection system according to claim 1, characterized in that: The first power device is used to drive the first piston to move from outside the cavity of the first drive cavity (11) to inside the cavity, so as to assist in driving the third piston to retreat, or to assist in adjusting the second speed and the third speed.

3. The injection system according to claim 1, characterized in that: The first driving chamber (11) and the second driving chamber (12) are both located on the side of the three-chamber injection cylinder (1).

4. The injection system according to claim 3, characterized in that: The first driving chamber (11) is arranged at the upper part of the three-chamber injection cylinder (1), and the second driving chamber (12) is arranged at the middle part of the three-chamber injection cylinder (1).

5. The injection system according to claim 1, characterized in that: The third driving cavity (13) is arranged in a vertical horizontal plane.

6. The injection system according to claim 5, characterized in that: The moving direction of the first piston in the first driving chamber (11) is perpendicular to the horizontal plane, and the moving direction of the second piston in the second driving chamber (12) is perpendicular to the horizontal plane.

7. A large-tonnage vertical die-casting machine, characterized in that: It comprises a mold clamping system and an injection molding system as described in any one of claims 1 to 6, wherein the mold clamping system comprises an upper crossbeam (2), a lower crossbeam (3), a plurality of columns (4) and a workbench, wherein the upper crossbeam (2) and the lower crossbeam (3) are fixedly connected via the plurality of columns (4), the workbench is arranged on the lower crossbeam (3), and the workbench comprises a first connecting portion for connecting to the mold, the injection molding system is arranged at the bottom of the lower crossbeam (3), and the three-cavity injection cylinder (1) vertically passes through the workbench.

8. The large-tonnage vertical die-casting machine according to claim 7, characterized in that: The mold closing system also includes a slider, a plunger cylinder is provided in the upper crossbeam (2), the slider is connected to the plunger cylinder, the plunger cylinder is used to drive the slider to move up and down, and the slider includes a second connecting portion for connecting to the upper mold (5).

9. A large-tonnage vertical die-casting machine according to claim 8, characterized in that: A main oil cylinder is also provided in the upper crossbeam (2), the plunger cylinder is connected to the main oil cylinder, and the main oil cylinder is used to drive the slider to move downward to close the mold through the plunger cylinder.

10. The large-tonnage vertical die-casting machine according to claim 8, characterized in that: It also includes a pull rod, which is connected to the slider and is used to drive the slider to move upward to open the mold.

11. The large-tonnage vertical die-casting machine according to claim 7, characterized in that: A shot channel is provided on the top of the three-cavity shot cylinder (1), and the shot channel is used to communicate with the feed port of the mold.

12. The large-tonnage vertical die-casting machine according to claim 7, characterized in that: It also includes a vacuum pumping device, which is provided with an interface for docking with a vacuum valve interface on the mold.

13. The large-tonnage vertical die-casting machine according to claim 7, characterized in that: The first connecting portion is a T-shaped slot, and the first connecting portion is used for sliding connection with the lower mold (6).

14. The large-tonnage vertical die-casting machine according to claim 8, characterized in that: The second connecting portion is a T-shaped slot, and the second connecting portion is used for sliding connection with the upper mold (5).

15. The large-tonnage vertical die-casting machine according to claim 8, characterized in that: A guide rail is provided on the lower surface of the upper crossbeam (2), and the slider is provided with a first connecting member, which is slidably connected to the guide rail.

16. A large-tonnage vertical die-casting machine according to claim 9 or 10, characterized in that: It also includes a slider locking device, which is arranged on the column (4) and is used to lock the slider when the slider is located at a preset position.

17. The large-tonnage vertical die-casting machine according to claim 7, characterized in that: The first power device, the second power device and the third power device are all driven by hydraulic power.

18. The large-tonnage vertical die-casting machine according to claim 15, characterized in that: It also includes a slider driving device, which is connected to the slider and is used to drive the slider to move on the guide rail to drive the upper mold (5) to move synchronously on the guide rail.

19. The large-tonnage vertical die-casting machine according to claim 18, characterized in that: The slider is provided with a displacement sensor, and the displacement sensor is used to detect the movement stroke of the slider.

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