An injection molding machine

Abstract

The utility model relates to the field of injection moulding, especially a injection moulding machine, including frame and install on the injection moulding device and power device of frame, the injection moulding device includes injection body and injection moulding conveying mechanism, injection body and frame fixed connection, injection moulding conveying mechanism and frame swing joint, power device and injection moulding conveying mechanism connect, to drive injection moulding conveying mechanism to be close to or away from injection body, power device is located outside injection body, power device includes first drive mechanism and second drive mechanism, first drive mechanism and second drive mechanism are connected with injection moulding conveying mechanism respectively, the volume of first drive mechanism is greater than the volume of second drive mechanism. Adopt the utility model, shorten reset time, improve injection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of injection molding, and in particular to an injection molding machine. Background Technology

[0002] An injection molding machine is a device used to produce plastic products, primarily through an injection molding unit. A typical injection molding machine includes an injection molding unit and a power unit. Driven by the power unit, the injection molding unit moves, conveying and injecting the raw material into the mold to form the plastic product. The power unit usually consists of multiple hydraulic cylinders and other components. The piston rod is connected to the injection molding unit; hydraulic oil flows through the cylinder to push the piston, which in turn drives the piston rod, which in turn drives the injection molding unit, causing it to move back and forth to perform the injection and resetting operations.

[0003] To provide sufficient pulling force to generate adequate injection force, existing hydraulic cylinders employ a relatively large cylinder volume. While a larger cylinder can generate sufficient pulling force during injection molding, the resistance during resetting of the injection unit is lower, meaning the thrust required is relatively smaller compared to the thrust during injection. If a large hydraulic cylinder is still used to drive resetting, the prolonged hydraulic oil inlet and resetting time will negatively impact overall injection efficiency, thus affecting production efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an injection molding machine that shortens the reset time and improves injection molding efficiency.

[0005] To solve the above-mentioned technical problems, this utility model provides an injection molding machine, including a frame and an injection molding device and a power device mounted on the frame. The injection molding device includes an injection body and an injection conveying mechanism. The injection body and the frame are fixedly connected, and the injection conveying mechanism and the frame are movably connected. The power device is connected to the injection conveying mechanism to drive the injection conveying mechanism to move closer to or away from the injection body.

[0006] The power unit is located outside the injection body; the power unit includes a first drive mechanism and a second drive mechanism, which are respectively connected to the injection delivery mechanism; the volume of the first drive mechanism is larger than the volume of the second drive mechanism.

[0007] As an improvement to the above solution, both the first drive mechanism and the second drive mechanism include a cylinder body, and the cross-sectional area of ​​the cylinder body of the first drive mechanism is larger than the cross-sectional area of ​​the cylinder body of the second drive mechanism.

[0008] As an improvement to the above solution, the number of the first driving mechanism is at least two, and they are arranged symmetrically with the injection body as the axis of symmetry.

[0009] The number of the second drive mechanism is at least two, and they are arranged symmetrically with the injection body as the axis of symmetry.

[0010] As an improvement to the above solution, the first driving mechanism and the second driving mechanism are fixedly connected to the injection body by reinforcing ribs.

[0011] As an improvement to the above solution, the power unit further includes a liquid control mechanism, which includes a liquid steering body disposed on the power unit and a liquid reversing mechanism disposed on the liquid steering body. The first drive mechanism and the second drive mechanism are respectively connected to the liquid steering body, and the liquid reversing mechanism is used to control the liquid flow direction in the liquid steering body.

[0012] As an improvement to the above solution, the liquid steering body is provided with a liquid flow channel, the first driving mechanism is connected to the liquid flow channel through the first tube, and the second driving mechanism is connected to the liquid flow channel through the second tube.

[0013] As an improvement to the above scheme, the cross-sectional area of ​​the first tube is larger than the cross-sectional area of ​​the second tube.

[0014] As an improvement to the above solution, the injection conveying mechanism is provided with a spiral conveying rod, which is inserted into the injection body and moves back and forth along the injection body by a power device;

[0015] The injection body is provided with a feeding port, and the feeding port and the spiral conveyor are arranged correspondingly.

[0016] As an improvement to the above solution, the frame is provided with a guide rail, and the injection molding conveying mechanism is slidably connected to the guide rail.

[0017] As an improvement to the above solution, both the first drive mechanism and the second drive mechanism are hydraulic cylinders.

[0018] The following are the beneficial effects of implementing this utility model:

[0019] This invention relates to an injection molding machine that uses a first drive mechanism and a second drive mechanism in conjunction to drive the injection conveying mechanism during injection molding, generating sufficient pulling force and allowing for adjustment of the pulling force. During the reset of the injection conveying mechanism, the resistance is low, allowing only the smaller second drive mechanism to push it. Due to the small size of the second drive mechanism, the time required for hydraulic oil to fill its rodless cavity is short, enabling rapid reset of the injection conveying mechanism. Compared to the larger first drive mechanism, this significantly shortens the reset time of the injection conveying mechanism, thereby improving injection molding efficiency and ultimately increasing production efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the injection molding machine of this utility model;

[0021] Figure 2 yes Figure 1 Enlarged view of the power unit;

[0022] Figure 3 yes Figure 2 A structural diagram from another angle. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0024] See Figure 1-3 This utility model discloses an injection molding machine, including a frame 1 and an injection molding device and a power device installed on the frame 1. The injection molding device includes an injection body 3 and an injection conveying mechanism 2. The injection body 3 is fixedly connected to the frame 1, and the injection conveying mechanism 2 is movably connected to the frame 1. The power device is connected to the injection conveying mechanism 2 to drive the injection conveying mechanism 2 to move closer to or away from the injection body 3.

[0025] The power unit is located outside the injection body 3; the power unit includes a first drive mechanism 4 and a second drive mechanism 5, the first drive mechanism 4 and the second drive mechanism 5 are respectively connected to the injection delivery mechanism 2; the volume of the first drive mechanism 4 is larger than the volume of the second drive mechanism 5.

[0026] This invention relates to an injection molding machine that uses a first drive mechanism and a second drive mechanism in conjunction to drive the injection conveying mechanism during injection molding, generating sufficient pulling force and allowing for adjustment of the pulling force. During the reset of the injection conveying mechanism, the resistance is low, allowing only the smaller second drive mechanism to push it. Due to the small size of the second drive mechanism, the time required for hydraulic oil to fill its rodless cavity is short, enabling rapid reset of the injection conveying mechanism. Compared to the larger first drive mechanism, this significantly shortens the reset time of the injection conveying mechanism, thereby improving injection molding efficiency and ultimately increasing production efficiency.

[0027] Preferably, both the first drive mechanism 4 and the second drive mechanism 5 are hydraulic cylinders.

[0028] Among them, such as Figure 3As shown, the injection conveying mechanism 2 is equipped with a spiral conveying rod (not shown in the figure), which is inserted into the injection body 3 and moves back and forth along the injection body 3 by a power device; the injection body 3 is equipped with a feeding port 31, which is correspondingly arranged with the spiral conveying rod.

[0029] During injection molding, the power unit drives the injection conveyor mechanism towards the injection body, bringing it closer to the injection body. This causes the screw conveyor to move from one end of the injection body to the other, injecting the raw material into the mold to form a plastic product. The feeding port is located at one end of the injection body, through which the raw material is fed onto the screw conveyor. As the screw conveyor moves, it also rotates around its own axis, conveying the raw material to the other end of the injection body. Therefore, since the screw conveyor moves within the injection body while rotating around its own axis, the power unit requires a relatively large pulling force. After injection molding is complete, when the screw conveyor needs to reset for the next injection, it does not need to rotate, thus the pushing force from the power unit on the injection conveyor mechanism is relatively small compared to the pulling force.

[0030] Preferably, such as Figure 1 As shown, the frame 1 is equipped with a guide rail 11, and the injection molding conveying mechanism 2 is slidably connected to the guide rail 11. The injection molding conveying mechanism slides along the guide rail, allowing it to move back and forth in a predetermined direction to ensure the normal operation of the injection molding machine.

[0031] Furthermore, such as Figure 1-3 As shown, both the first drive mechanism 4 and the second drive mechanism 5 include a cylinder 41. The cross-sectional area of ​​the cylinder 41 of the first drive mechanism 4 is larger than that of the cylinder 41 of the second drive mechanism 5. The lengths of the cylinder 41 of the first drive mechanism 4 and the second drive mechanism 5 are equal. Specifically, a piston (not shown in the figure) is provided inside the cylinder 41, and the piston is connected to the injection molding conveying mechanism 2 through a piston rod 42. The piston divides the cylinder into a rod chamber and a rodless chamber. Hydraulic oil is injected into the rod chamber or the rodless chamber to drive the piston to move within the cylinder, thereby causing the piston rod to move the injection molding conveying mechanism.

[0032] Preferably, there are at least two first drive mechanisms 4, arranged symmetrically about the injection body 3; and at least two second drive mechanisms 5, also arranged symmetrically about the injection body 3. Both the injection body and the cylinder are cylindrical. The axes of the first drive mechanism, the second drive mechanism, and the injection body are parallel to each other. The first drive mechanism, the second drive mechanism, and the injection body are fixedly connected.

[0033] In order to ensure that the injection conveying mechanism is in a balanced state of force during movement, a first driving mechanism and a second driving mechanism are respectively provided on both sides of the injection body. The two first driving mechanisms are arranged symmetrically about the injection body as the axis of symmetry, and the two second driving mechanisms are arranged symmetrically about the injection body as the axis of symmetry.

[0034] Better, such as Figure 3 As shown, the first drive mechanism 4 and the second drive mechanism 5 are fixedly connected to the injection body 3 via reinforcing ribs 6, which extend axially along the injection body 3. The reinforcing ribs further enhance the reliability of the connection between the drive mechanism and the injection body, making them an integral unit and ensuring that the injection delivery mechanism moves towards the injection body.

[0035] Furthermore, such as Figure 2-3 As shown, the power unit further includes a liquid control mechanism, which includes a liquid steering body 7 disposed on the power unit and a liquid reversing mechanism 8 disposed on the liquid steering body 7. The first drive mechanism 4 and the second drive mechanism 5 are respectively connected to the liquid steering body 7. The liquid reversing mechanism 8 is used to control the liquid flow direction within the liquid steering body 7. The liquid reversing mechanism 8 is preferably a hydraulic solenoid valve.

[0036] The liquid control mechanism is directly mounted on the power unit, eliminating the need for additional mounting components and reducing the overall size of the injection molding machine. Hydraulic oil is supplied into the liquid steering body, and the flow direction of the hydraulic oil within the liquid steering body is controlled by the liquid reversing mechanism. This controls the flow of hydraulic oil to the first or second drive mechanism, and to the rod-side or rodless-side chamber, thereby enabling the injection conveying mechanism to move back and forth.

[0037] Preferably, such as Figure 2-3 As shown, the liquid steering body 7 has a liquid flow channel (not shown in the figure). The first drive mechanism 4 is connected to the liquid flow channel through the first pipe 9, and the second drive mechanism 5 is connected to the liquid flow channel through the second pipe 10. The liquid steering body 7 is also provided with a main pipe 12, which is connected to a container for storing hydraulic oil. Hydraulic oil can be drawn into the liquid steering body by a pump. Through the liquid flow channel and the liquid reversing mechanism, the flow of hydraulic oil to specific drive mechanisms and cavities is controlled to realize the injection or reset operation of the injection delivery mechanism.

[0038] More preferably, the cross-sectional area of ​​the first pipe 9 is larger than the cross-sectional area of ​​the second pipe 10. Since the volume of the first drive mechanism is larger than the volume of the second drive mechanism, the first pipe and the first drive mechanism, the second pipe and the second drive mechanism are matched accordingly, which improves the efficiency of oil inlet and outlet and avoids damage to the cylinder due to excessive oil pressure.

[0039] In summary, this utility model provides an injection molding machine that shortens the reset time and improves injection molding efficiency.

[0040] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. An injection molding machine, characterized in that, The device includes a frame and an injection molding unit and a power unit mounted on the frame. The injection molding unit includes an injection body and an injection conveying mechanism. The injection body and the frame are fixedly connected, and the injection conveying mechanism and the frame are movably connected. The power unit is connected to the injection conveying mechanism to drive the injection conveying mechanism to move closer to or away from the injection body. The power unit is located outside the injection body; the power unit includes a first drive mechanism and a second drive mechanism, which are respectively connected to the injection delivery mechanism; the volume of the first drive mechanism is larger than the volume of the second drive mechanism. The number of the first driving mechanism is at least two, and they are arranged symmetrically about the injection body as the axis of symmetry. The number of the second drive mechanism is at least two, and they are arranged symmetrically with the injection body as the axis of symmetry.

2. The injection molding machine as described in claim 1, characterized in that, Both the first drive mechanism and the second drive mechanism include a cylinder body, and the cross-sectional area of ​​the cylinder body of the first drive mechanism is larger than the cross-sectional area of ​​the cylinder body of the second drive mechanism.

3. The injection molding machine as described in claim 1, characterized in that, The first driving mechanism and the second driving mechanism are fixedly connected to the injection body by reinforcing ribs.

4. The injection molding machine as described in claim 1, characterized in that, The power unit also includes a liquid control mechanism, which includes a liquid steering body disposed on the power unit and a liquid reversing mechanism disposed on the liquid steering body. The first drive mechanism and the second drive mechanism are respectively connected to the liquid steering body, and the liquid reversing mechanism is used to control the liquid flow direction in the liquid steering body.

5. The injection molding machine as described in claim 4, characterized in that, The liquid steering body is provided with a liquid flow channel. The first driving mechanism is connected to the liquid flow channel through a first tube, and the second driving mechanism is connected to the liquid flow channel through a second tube.

6. The injection molding machine as described in claim 5, characterized in that, The cross-sectional area of ​​the first tube is greater than that of the second tube.

7. The injection molding machine as described in claim 1, characterized in that, The injection conveying mechanism is equipped with a spiral conveying rod, which is inserted into the injection body and moves back and forth along the injection body via a power device. The injection body is provided with a feeding port, and the feeding port and the spiral conveyor are arranged correspondingly.

8. The injection molding machine as described in claim 1, characterized in that, The frame is equipped with guide rails, and the injection molding conveying mechanism is slidably connected to the guide rails.

9. The injection molding machine as described in any one of claims 1-8, characterized in that, Both the first drive mechanism and the second drive mechanism are hydraulic cylinders.

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