Double-cylinder injection device with built-in loosening oil cylinder

Abstract

The utility model relates to the technical field of injection molding, in particular to a double-cylinder injection device with a built-in loosening oil cylinder, which comprises an injection oil cylinder rear cover, a loosening plunger, an injection piston, an injection table front plate, an injection oil cylinder barrel, an injection oil cylinder front cover, an injection piston rod and an injection table rear plate. The release plunger and the injection piston are surrounded by the injection oil cylinder barrel, the injection oil cylinder barrel is arranged in the injection table front plate, the injection oil cylinder front cover seals the front end of the oil cylinder, the two ends of the injection piston rod are connected with the injection piston and the injection table rear plate respectively, and the injection oil cylinder rear cover seals the rear end of the oil cylinder. The oil cylinder is small in size and small in oil discharge quantity, so that the oil return resistance is reduced, the loosening action speed is higher, the energy consumption is reduced, the device is simple in structure, convenient to install and low in cost, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to a double-cylinder injection device with a built-in loosening and retraction oil cylinder. Background Art

[0002] Traditional injection systems typically use a single-cylinder design. While simple in structure, this design is limited in injection speed and precision, making it inadequate for high-quality production. Dual-cylinder systems, on the other hand, achieve more complex injection processes by simultaneously controlling the movement of two cylinders, improving both precision and efficiency. This type of system has become increasingly popular in large-scale production.

[0003] Due to increasing demands for environmental protection and energy conservation, companies are seeking more efficient hydraulic systems to reduce energy consumption and improve production efficiency. Therefore, it is urgent to design an energy-saving, efficient, and easy-to-operate injection unit with a built-in release and retraction cylinder. Utility Model Content

[0004] The purpose of this utility model is to overcome the above problems and provide a double-cylinder injection device with a built-in release and withdrawal cylinder. To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A double-cylinder injection device with a built-in release and withdrawal cylinder includes an injection cylinder rear cover, a release and withdrawal plunger, an injection piston, a shooting platform front plate, an injection cylinder barrel, an injection cylinder front cover, an injection piston rod, and a shooting platform rear plate;

[0006] The rear cover of the injection cylinder is connected to the loosening plunger to form the rear part of the cylinder; the injection cylinder barrel surrounds the loosening plunger and the injection piston; the injection cylinder barrel is arranged inside the front plate of the shooting platform; the front cover of the injection cylinder closes the front end of the cylinder; the two ends of the injection piston rod are respectively connected to the injection piston and the rear plate of the shooting platform; the rear cover of the injection cylinder closes the rear end of the cylinder.

[0007] As an improvement, the release plunger is placed inside the injection cylinder, with its rear end inserted into the rear cover of the injection cylinder and its front end embedded in the injection piston rod, forming a structure that can move forward and backward.

[0008] As an improvement, the injection piston is sleeved on one end of the injection piston rod and is slidably connected to the inner wall of the injection oil cylinder.

[0009] As an improvement, the middle of the front plate of the shooting platform is embedded in the barrel.

[0010] As an improvement, the two ends of the injection oil cylinder are respectively connected to the injection oil cylinder front cover and the injection oil cylinder rear cover.

[0011] As an improvement, a first hydraulic oil inlet and outlet hole is provided on the front cover of the injection cylinder, and the first hydraulic oil inlet and outlet hole connects the injection cylinder barrel with the outside world.

[0012] As an improvement, the rear cover of the injection oil cylinder is provided with air inlet and outlet holes, and the air inlet and outlet holes connect the injection oil cylinder barrel with the outside world.

[0013] As an improvement, the injection piston rod is a hollow rod, and a second hydraulic oil inlet and outlet hole is formed at its end, and the second hydraulic oil inlet and outlet hole connects the injection oil cylinder barrel with the outside world.

[0014] The advantages of the present invention are:

[0015] 1. During injection, the oil release cylinder is built into the hollow injection piston rod, so the oil discharge volume is small, thereby reducing the resistance of oil return and lowering energy consumption.

[0016] 2. This device integrates the release cylinder into the injection piston rod. The cylinder is small in size, which makes the release action faster and improves production efficiency.

[0017] 3. This device integrates the oil release cylinder into the injection piston rod, eliminating the need to manufacture an additional oil release cylinder barrel. It features a simple structure, easy installation, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a double-cylinder injection device with a built-in release and withdrawal cylinder in an embodiment.

[0019] Figure 2 This is a structural cross-sectional view of a double-cylinder injection device with a built-in oil release cylinder in an embodiment.

[0020] Figure 3 This is a diagram of the internal structure of the injection cylinder in the embodiment.

[0021] Figure 4 It is a right side view of the internal structure of the injection cylinder in the embodiment.

[0022] The symbols in the figure are:

[0023] 1. Injection cylinder rear cover; 2. Loose plunger; 3. Injection piston; 4. Shooting platform front plate; 5. Injection cylinder barrel; 6. Injection cylinder front cover; 7. Injection piston rod; 8. Shooting platform rear plate; 9. Air inlet and outlet holes; 10. First hydraulic oil inlet and outlet holes; 11. Second hydraulic oil inlet and outlet holes. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0025] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the utility model is usually placed when in use. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0026] Furthermore, the use of terms such as "horizontal," "vertical," and "overhanging" does not necessarily imply that the component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0027] In the description of the embodiments of the present invention, "a plurality" represents at least 2.

[0028] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0029] The present invention is described in detail and specifically below through specific embodiments to facilitate a better understanding of the present invention. However, the following embodiments do not limit the scope of protection of the present invention.

[0030] Example 1

[0031] This embodiment discloses a double-cylinder injection device with a built-in release and withdrawal cylinder.

[0032] like Figure 1-4As shown, this embodiment includes an injection cylinder rear cover 1, a release plunger 2, an injection piston, a shooting platform front plate 4, an injection cylinder barrel 5, an injection cylinder front cover 6, an injection piston rod 7, and a shooting platform rear plate 8; the injection cylinder rear cover 1 is connected to the release plunger 2 to form the rear part of the cylinder; the injection cylinder barrel 5 surrounds the release plunger 2 and the injection piston; the injection cylinder barrel 5 is arranged inside the shooting platform front plate 4; the injection cylinder front cover 6 closes the front end of the cylinder; the two ends of the injection piston rod 7 are respectively connected to the injection piston and the shooting platform rear plate 8; the injection cylinder rear cover 1 closes the rear end of the cylinder.

[0033] During injection, hydraulic oil enters the injection cylinder 5 through the first hydraulic oil inlet and outlet 10. Under the action of the oil pressure, the injection piston moves leftward within the injection cylinder 5, simultaneously driving the injection piston rod 7, the shooting platform rear plate 8, and the screw to the left. Consequently, the gas in the cylinder is discharged through the air inlet and outlet 9. Simultaneously, the hydraulic oil in the release cylinder built into the injection piston rod 7 is discharged through the second hydraulic oil inlet and outlet 11. During injection, the built-in release cylinder of this device discharges a small amount of oil, thereby reducing the resistance to oil return and lowering energy consumption.

[0034] During the release and retraction operation, hydraulic oil enters the release cylinder built into the injection piston rod 7 through the second hydraulic oil inlet and outlet hole 11. Under the action of the oil pressure, the injection piston rod 7 moves rightward within the injection cylinder barrel 5, simultaneously driving the injection piston, the shooting platform rear plate 8, and the screw to move rightward. The hydraulic oil in the injection cylinder barrel 5 is then discharged through the first hydraulic oil inlet and outlet hole 10. Due to the small size of the built-in release cylinder, this device can achieve faster release and retraction, improving production efficiency.

[0035] It should be noted that during the entire injection and release process, the gas in the injection cylinder 5 is discharged and inhaled through the air inlet and outlet holes 9 on the injection cylinder rear cover 1. This design ensures that the gas pressure in the cylinder is maintained at an appropriate level. At the same time, the effective discharge and inhalation of gas helps to improve the stability and response speed of the system.

[0036] It needs to be explained that

[0037] In this embodiment, the release plunger 2 is positioned within the injection cylinder 5, with its rear end inserted into the injection cylinder rear cover 1 and its front end embedded in the injection piston rod 7, forming a structure that allows for forward and backward movement. This structural design allows the release plunger 2 to effectively utilize the power of the hydraulic system during operation, achieving rapid release and retraction, providing smooth movement during dynamic operation and reducing motion resistance, thereby improving production efficiency.

[0038] The injection piston is mounted on one end of the injection piston rod 7 and is slidably connected to the inner wall of the injection cylinder 5. This sliding connection ensures smooth movement, reducing friction and energy loss. This sliding connection design reduces friction and improves the efficiency of the injection piston's movement, enhancing injection precision during the injection and withdrawal processes and ensuring uniformity and quality of the molded material.

[0039] Furthermore, the middle of the shooting platform front plate 4 is embedded in the barrel.

[0040] The two ends of the injection cylinder 5 are respectively connected to the injection cylinder front cover 6 and the injection cylinder rear cover 1.

[0041] The injection cylinder front cover 6 is provided with a first hydraulic oil inlet and outlet port 10, which connects the injection cylinder barrel 5 to the outside world. This port connects the hydraulic system to the outside world, controlling the flow of hydraulic oil and thus achieving precise control of the injection process. By adjusting the hydraulic oil pressure, the speed and force of the injection can be easily manipulated, optimizing production efficiency and product quality.

[0042] The injection cylinder rear cover 1 is provided with an air inlet and outlet hole 9, which connects the injection cylinder barrel 5 with the outside world. This design enhances the flexibility of the hydraulic system and makes the replacement and discharge of hydraulic oil more convenient.

[0043] The injection piston rod 7 is hollow, with a second hydraulic oil inlet and outlet port 11 formed at its distal end. This second hydraulic oil inlet and outlet port 11 connects the injection cylinder 5 with the outside world. This hollow design not only reduces the weight of the piston rod but also allows for more flexible control and response of the hydraulic oil through this port, thereby more precisely adjusting the dynamic processes of injection and withdrawal and improving the integrity of the system.

[0044] The barrel is embedded in the middle of the front plate 4 of the shooting platform, which is responsible for storing and transporting plastic raw materials. This design makes the supply of raw materials more convenient and reduces the waiting time in the production process. The injection piston rod 7 is embedded on both sides of the injection seat. The middle part is connected to the barrel through a screw, and the front end is connected to the five-star motor. The injection seat helps to effectively transfer the pressure generated by the hydraulic system to the barrel, pushing the molten plastic into the barrel cavity. During the injection molding process, the injection seat fits tightly with the barrel to prevent displacement during the injection or cooling process, thereby ensuring the accuracy of the molding. At the same time, the five-star motor converts hydraulic energy into mechanical energy, drives the movement of the screw, and provides power for the entire injection system. Through precise motion control, it ensures the efficient and stable operation of the injection piston, screw and other components during the injection process, thereby realizing the functions of injection and loosening.

[0045] The above detailed description of the specific embodiments of the present invention is intended to serve only as examples, and the present invention is not equivalent to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to the present invention are also within the scope of the present invention. Therefore, equivalent changes and modifications made without departing from the spirit and scope of the present invention are intended to be encompassed within the scope of the present invention.

Claims

1. A double-cylinder injection device with a built-in loosening and retraction cylinder, characterized in that: It comprises an injection cylinder rear cover (1), a release plunger (2), an injection piston (3), a shooting platform front plate (4), an injection cylinder barrel (5), an injection cylinder front cover (6), an injection piston rod (7) and a shooting platform rear plate (8); The injection cylinder rear cover (1) is connected to the release plunger (2) to form the rear part of the cylinder; the injection cylinder barrel (5) surrounds the release plunger (2) and the injection piston (3); the injection cylinder barrel (5) is arranged inside the front plate (4) of the shooting platform; the injection cylinder front cover (6) closes the front end of the cylinder; the two ends of the injection piston rod (7) are respectively connected to the injection piston (3) and the shooting platform rear plate (8); the injection cylinder rear cover (1) closes the rear end of the cylinder.

2. A double-cylinder injection device with a built-in oil release cylinder according to claim 1, characterized in that: The release plunger (2) is placed inside the injection oil cylinder (5), with its rear end inserted into the injection oil cylinder rear cover (1) and its front end embedded in the injection piston rod (7), forming a structure that can move forward and backward.

3. A double-cylinder injection device with a built-in oil release cylinder according to claim 2, characterized in that: The injection piston (3) is sleeved on one end of the injection piston rod (7) and is slidably connected to the inner wall of the injection oil cylinder (5).

4. A double-cylinder injection device with a built-in oil release cylinder according to claim 3, characterized in that: The middle of the shooting platform front plate (4) is embedded in the barrel.

5. A double-cylinder injection device with a built-in oil release cylinder according to claim 4, characterized in that: The two ends of the injection oil cylinder (5) are respectively connected to the injection oil cylinder front cover (6) and the injection oil cylinder rear cover (1).

6. A double-cylinder injection device with a built-in oil release cylinder according to claim 5, characterized in that: A first hydraulic oil inlet and outlet hole (10) is provided on the injection oil cylinder front cover (6), and the first hydraulic oil inlet and outlet hole (10) connects the injection oil cylinder barrel (5) with the outside world.

7. A double-cylinder injection device with a built-in oil release cylinder according to claim 6, characterized in that: The injection oil cylinder rear cover (1) is provided with air inlet and outlet holes (9), and the air inlet and outlet holes (9) are connected to the injection oil cylinder barrel (5) and the outside world.

8. The double-cylinder injection device with built-in oil release and withdrawal cylinder according to claim 7, characterized in that: The injection piston rod (7) is a hollow rod, and a second hydraulic oil inlet and outlet hole (11) is formed at its end. The second hydraulic oil inlet and outlet hole (11) connects the injection oil cylinder (5) with the outside world.

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