Hydraulic adjusting eccentric device for machine head of plastic extruding machine

Abstract

The utility model relates to the technical field of wire and cable processing, in particular to a hydraulic adjusting eccentric device for a machine head of a plastic extruding machine, which is characterized in that a die sleeve is respectively contacted with a piston rod in the upper, lower, left and right directions, the piston rods are connected with a hydraulic propelling device, and the hydraulic propelling device is connected with a hydraulic oil tank through a hydraulic oil pipe in a connecting pipe; a sensing control circuit in the connecting pipe is connected with the hydraulic pump, the hydraulic oil tank is connected with the hydraulic pump, and the hydraulic pump is connected with the hydraulic control system through a control circuit. According to the eccentric adjusting device, the accuracy of eccentric adjustment is achieved, the uniformity and normalization of an eccentric adjusting mode are further achieved, the die sleeve can be effectively and stably locked, and the risk of further eccentricity of the die sleeve is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wire and cable processing technology, specifically to a hydraulic adjustment eccentric device for the extruder head. Background Technology

[0002] When extruding insulation and sheathing of wires and cables using an extruder, after installing the die core and die sleeve, the operator usually needs to shine a flashlight on the opening of the die core and die sleeve to visually inspect whether the die core and die sleeve are concentric. However, due to the certain gap between the die core and die sleeve, and due to the differences in the operator's manual judgment experience and visual perception, the effect of hollow adjustment is not obvious.

[0003] To address this issue, operators measure the thickness of the insulation or sheath by extruding a plastic tube using an extruder, and then adjust the concentricity of the die core and sleeve by combining this with their experience in eccentricity adjustment. However, this common method of eccentricity adjustment, as existing technology, is both time-consuming and wasteful of materials such as plastics, water, and electricity. It also requires a high level of extrusion experience from the workers, and because the tightening effect of this method is limited, it often results in the concentricity shifting again due to loosening.

[0004] Based on the above reasons, this utility model designs a hydraulic adjustment eccentricity device for extruder head. By modifying the traditional extruder head adjustment screw into a small hydraulic piston rod, and with the real-time monitoring and linkage of the sensing equipment, the accuracy of eccentricity adjustment is achieved, thereby realizing the uniformity and standardization of the eccentricity adjustment method. It can also effectively and stably lock the die sleeve, reducing the risk of further eccentricity. Summary of the Invention

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a hydraulic adjustment eccentricity device for the extruder head. By modifying the traditional extruder head adjustment screw into a small hydraulic piston rod, and with the real-time monitoring and linkage of the sensing equipment, the accuracy of eccentricity adjustment is achieved, thereby realizing the uniformity and standardization of the eccentricity adjustment method. It can also effectively and stably lock the die sleeve, reducing the risk of further eccentricity.

[0006] To achieve the above objectives, this utility model provides a hydraulic adjustment eccentricity device for the extruder head. The die sleeve contacts a piston rod in each of the up, down, left, and right directions. The piston rod is connected to a hydraulic propulsion device. The hydraulic propulsion device is connected to a hydraulic oil tank through a hydraulic oil pipe in a connecting pipe. The sensing and control circuit in the connecting pipe is connected to a hydraulic pump. The hydraulic oil tank is connected to the hydraulic pump. The hydraulic pump is connected to a hydraulic control system through a control circuit.

[0007] The outer periphery of the mold sleeve is a sleeve, which is located inside the extruder head.

[0008] The piston rods in the up, down, left, and right directions are arranged in a cross shape.

[0009] The hydraulic propulsion device includes sensors, hydraulic oil, piston rods, and hydraulic cylinders.

[0010] The piston rod hydraulic cylinder is connected to the inlet P and return port T of the three-position four-way solenoid valve via a hydraulically controlled check valve. The inlet P of the three-position four-way solenoid valve is connected to the hydraulic pump and then to the hydraulic oil tank after passing through a filter. The inlet P of the three-position four-way solenoid valve is connected to the relief valve, and the return port T of the three-position four-way solenoid valve is connected to the hydraulic oil tank.

[0011] Compared with existing technologies, this utility model utilizes a hydraulic piston rod propulsion device with four hydraulic piston rods (upper, lower, left, and right). Powered by a hydraulic oil pump, the piston rods are propelled by high-temperature resistant hydraulic oil flowing through hydraulic pipes from a hydraulic oil tank. The propulsion length is controlled by the input panel of the hydraulic control system. Simultaneous adjustment of the piston rods ensures the accuracy and stability of eccentric adjustment, saves significant time, and avoids material waste. Furthermore, the hydraulically controlled check valve locking circuit ensures that the piston rods are quickly, smoothly, reliably, and reliably locked for extended periods when the hydraulic cylinder is not in operation, preventing movement by external forces and maintaining their concentric stability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the hydraulic locking circuit of this utility model.

[0014] Explanation of reference numerals in the attached figures:

[0015] 1 is the piston rod, 2 is the hydraulic propulsion device, 3 is the connecting pipe, 4 is the hydraulic oil tank, 5 is the hydraulic pump, 6 is the hydraulic control system, 7 is the control circuit, 8 is the piston rod hydraulic cylinder, 9 is the hydraulic control check valve, 10 is the three-position four-way solenoid valve, 11 is the overflow valve, 12 is the filter, 13 is the extruder head, 14 is the mold sleeve, and 15 is the sleeve. Detailed Implementation

[0016] The present invention will now be further described with reference to the accompanying drawings.

[0017] See Figures 1-2 This utility model provides a hydraulic adjustment eccentric device for the extruder head. The die sleeve 14 is in contact with a piston rod 1 in each of the up, down, left and right directions. The piston rod 1 is connected to the hydraulic propulsion device 2. The hydraulic propulsion device 2 is connected to the hydraulic oil tank 4 through the hydraulic oil pipe in the connecting pipe 3. The sensing and control circuit in the connecting pipe 3 is connected to the hydraulic pump 5. The hydraulic oil tank 4 is connected to the hydraulic pump 5. The hydraulic pump 5 is connected to the hydraulic control system 6 through the control circuit 7.

[0018] The outer periphery of the mold sleeve 14 is the sleeve 15, which is located inside the extruder head 13.

[0019] The piston rods 1 in the up, down, left, and right directions are arranged in a cross shape.

[0020] The hydraulic propulsion device 2 includes a sensor, hydraulic oil, and a piston rod hydraulic cylinder 8.

[0021] The piston rod hydraulic cylinder 8 is connected to the inlet P and return port T of the three-position four-way solenoid valve 10 via the hydraulic control check valve 9. The inlet P of the three-position four-way solenoid valve 10 is connected to the hydraulic pump 5 and then to the hydraulic oil tank 4 via the filter 12. The inlet P of the three-position four-way solenoid valve 10 is connected to the relief valve 11, and the return port T of the three-position four-way solenoid valve 10 is connected to the hydraulic oil tank 4.

[0022] Working principle:

[0023] This invention requires minimal adjustment during use. The piston rod 1, hydraulic propulsion device 2, and connecting pipe 3 form a hydraulic actuator, replacing the original adjusting screw, to adjust the eccentricity of the mold sleeve 14 in four directions. The hydraulic control system 6 and control circuit 7 form a hydraulic control and adjustment element, which can control the propulsion length of the hydraulic actuator to achieve adjustment of the mold sleeve 14 in four directions. The hydraulic oil tank 4 and hydraulic pump 5 form a hydraulic power element, providing high-temperature resistant hydraulic oil and a hydraulic pump. Under the sensing, control, and command of the hydraulic control and adjustment element, the hydraulic pump 5 applies force to the piston rod hydraulic cylinder 8, which in turn drives the piston rod 1 to adjust the position of the mold sleeve 14.

[0024] After the concentric position is adjusted, the hydraulic oil tank 4, hydraulic pump 5, piston rod hydraulic cylinder 8, hydraulic control check valve 9, three-position four-way solenoid valve 10, relief valve 11 and filter 12 together form a hydraulic control check valve locking circuit, which can lock the piston rod 1 quickly, smoothly, reliably and for a long time when the hydraulic cylinder is not working, and prevent it from being moved by external forces.

[0025] The above are merely preferred embodiments of this utility model, intended only to aid in understanding the method and core concept of this application. The scope of protection of this utility model is not limited to the above embodiments; all technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] This invention comprehensively solves the shortcomings of existing technologies that rely on manual labor and experience to adjust the concentricity of the die core and die sleeve by adjusting the adjusting screws on the extruder head, and the drawback that even after adjustment, the concentricity can deviate again due to loosening of the adjusting screws. It replaces all four adjusting screws (top, bottom, left, and right) of the original extruder with a hydraulic piston rod propulsion device and a hydraulically controlled one-way valve locking circuit. This allows for real-time linkage adjustment of the die sleeve in four directions, greatly enhancing the efficiency and accuracy of adjusting the concentricity of the die core and die sleeve, and further reducing material waste. Simultaneously, it considers the stability requirements after adjustment. The hydraulically controlled one-way valve locking circuit ensures that the piston rod can be quickly, smoothly, and reliably locked even when the hydraulic cylinder is not working, preventing movement by external forces. This indirectly ensures the accuracy, stability, and efficiency of concentricity adjustment, and further reduces manual risks.

Claims

1. A hydraulically adjustable eccentric device for the extruder head, characterized in that, The mold sleeve (14) is in contact with a piston rod (1) in each of the up, down, left and right directions. The piston rod (1) is connected to the hydraulic propulsion device (2). The hydraulic propulsion device (2) is connected to the hydraulic oil tank (4) through the hydraulic oil pipe in the connecting pipe (3). The sensing control line in the connecting pipe (3) is connected to the hydraulic pump (5). The hydraulic oil tank (4) is connected to the hydraulic pump (5). The hydraulic pump (5) is connected to the hydraulic control system (6) through the control line (7).

2. The hydraulic eccentric adjustment device for the extruder head according to claim 1, characterized in that, The outer periphery of the mold sleeve (14) is a sleeve (15), which is located inside the extruder head (13).

3. The hydraulic adjustment eccentricity device for the extruder head according to claim 1, characterized in that, The piston rods (1) in the up, down, left, and right directions are arranged in a cross shape.

4. The hydraulic eccentric adjustment device for the extruder head according to claim 1, characterized in that, The hydraulic propulsion device (2) includes a sensor, hydraulic oil, and a piston rod hydraulic cylinder (8).

5. The hydraulic eccentric adjustment device for the extruder head according to claim 4, characterized in that, The piston rod hydraulic cylinder (8) is connected to the oil inlet P and oil return T of the three-position four-way solenoid valve (10) via the hydraulic control check valve (9). The oil inlet P of the three-position four-way solenoid valve (10) is connected to the hydraulic pump (5) and then to the hydraulic oil tank (4) via the filter (12). The oil inlet P of the three-position four-way solenoid valve (10) is connected to the relief valve (11). The oil return T of the three-position four-way solenoid valve (10) is connected to the hydraulic oil tank (4).

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