Adjustable air cylinder for hot runner

Abstract

The utility model relates to the technical field of hot runner air cylinders, and discloses an adjustable air cylinder for a hot runner, which comprises an air cylinder main body, an air cylinder cover, a bolt, a positioning column, a piston, an exhaust port, an air inlet, a first O-shaped sealing ring, a second O-shaped sealing ring and a third O-shaped sealing ring, the internal pressure is maintained and other assemblies are supported, the bolts are used for fixing the cylinder cover to the cylinder body and ensuring sealing and stability, the positioning columns help to accurately position the cylinder cover and maintain correct alignment of the cylinder cover and the cylinder body, and the piston moves in the cylinder under the action of gas pressure and controls flowing of gas and movement of mechanical parts. According to the adjustable air cylinder for the hot runner, a user can very accurately adjust the stroke length of the piston through the stroke adjusting base and the stroke adjusting screw, the precision of mechanical operation is guaranteed through the precision, and the air cylinder can play a key role in application where flow and pressure need to be strictly controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runner cylinders, in particular to an adjustable cylinder for a hot runner. Background Art

[0002] Hot runner cylinders are key components of hot runner systems used in the plastic injection molding industry. They are responsible for precisely controlling the flow of molten plastic. Such cylinders are usually installed in injection molds to regulate the injection of molten plastic by controlling the opening and closing of valves, thereby affecting the quality and molding speed of the final product. The operation of hot runner cylinders needs to be very precise because the flow rate and pressure of molten plastic are directly related to the molding quality and production efficiency of the product.

[0003] Traditional hot runner cylinders often face the problem of non-adjustability, which means that once the cylinder is designed and installed in the mold, its working parameters (such as stroke length, pressure, etc.) are difficult to adjust according to production needs. This lack of flexibility may lead to inefficiency and poor adaptability when processing different models of products or adapting to new production requirements. For example, if the viscosity of the plastic changes or the product design changes, the traditional cylinder cannot be properly adjusted to optimize the production process, which may lead to increased product defects, extended production downtime, and material waste. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The utility model aims to provide an adjustable cylinder for a hot runner, so as to solve the problem of low efficiency and poor adaptability caused by the non-adjustability of the conventional hot runner cylinder mentioned in the background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adjustable cylinder for a hot runner, the adjustable cylinder for a hot runner comprising a cylinder body, a cylinder head, a bolt, a positioning column, a piston, an exhaust port, an air inlet, a piston rod, a valve needle, an end cover, a stroke adjustment seat, a stroke adjustment screw, a cup head screw, a first O-ring, a second O-ring and a third O-ring, a cylinder head is arranged at the top end of the cylinder body, a bolt is arranged at the upper end of the cylinder head, a positioning column is arranged at the lower end of the cylinder head, and the interior of the cylinder body A piston is provided, an exhaust port is provided at the upper position of the cylinder body, and an air inlet is provided at the lower position of the cylinder body. The cylinder body constitutes the main frame of the device, provides structural support and accommodates internal moving parts. The cylinder head closes the opening of the cylinder, maintains internal pressure and supports other components. Bolts are used to fix the cylinder head to the cylinder body to ensure sealing and stability. The positioning column helps to accurately position the cylinder head and keep it correctly aligned with the cylinder body. The piston moves in the cylinder under the action of gas pressure to control the flow of gas and the movement of mechanical parts.

[0008] Preferably, a piston rod is provided through the piston, and a valve needle is provided at the lower end of the piston rod. The piston rod is connected to the piston to transmit the linear motion of the piston to drive an external machine or valve, and the valve needle is responsible for opening or closing the flow path to control the passage of the fluid.

[0009] Preferably, an end cover is provided at the bottom end of the cylinder body, and a stroke adjustment seat is provided at the top end of the piston rod. The end cover seals the other end of the cylinder to maintain the pressure inside the cylinder and the integrity of the structure.

[0010] Preferably, a stroke adjustment screw is provided on the stroke adjustment seat, and a cup head screw is provided at the lower end of the piston rod. The stroke adjustment seat provides an interface for installing the stroke adjustment screw, allowing the user to adjust the movement range of the piston.

[0011] Preferably, a first O-ring is disposed at the top of the cylinder body, and the first O-ring provides an effective seal to prevent gas leakage inside the cylinder.

[0012] Preferably, a second O-ring is provided at the lower side of the first O-ring, and the second O-ring is sleeved on the circumference of the cylinder body.

[0013] Preferably, a third O-ring is provided on the lower side of the second O-ring, and the third O-ring is sleeved on the circumference of the cylinder body.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The hot runner uses an adjustable cylinder. Through the stroke adjustment seat and the stroke adjustment screw, the user can adjust the stroke length of the piston very accurately. This precision not only ensures the accuracy of mechanical operation, but also enables the cylinder to play a key role in applications that require strict control of flow and pressure;

[0016] 2. The hot runner uses an adjustable cylinder equipped with multiple O-rings, which form multi-layer protection on the top and sides of the cylinder body, greatly reducing the possibility of gas leakage. Good sealing performance ensures the operating efficiency and safety of the cylinder and extends the service life of the equipment;

[0017] 3. The hot runner uses an adjustable cylinder and a cup head screw to fix the piston rod, which increases the structural stability of the entire device. In addition, bolts and positioning columns are used to ensure the correct installation and fixation of the cylinder head, which enhances the safety and reliability of the cylinder under high-pressure operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the cylinder of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the cylinder of the utility model;

[0020] Figure 3 This is the top view of the cylinder of the utility model;

[0021] Figure 4 For this utility model Figure 2 A is an enlarged view of the middle image.

[0022] In the figure: 1. Cylinder body; 2. Cylinder head; 3. Bolt; 4. Positioning column; 5. Piston; 6. Exhaust port; 7. Inlet port; 8. Piston rod; 9. Valve needle; 10. End cover; 11. Stroke adjustment seat; 12. Stroke adjustment screw; 13. Cup head screw; 14. First O-ring; 15. Second O-ring; 16. Third O-ring. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-Figure 4The utility model provides a technical solution: an adjustable cylinder for a hot runner, the adjustable cylinder for a hot runner comprises a cylinder body 1, a cylinder head 2, a bolt 3, a positioning column 4, a piston 5, an exhaust port 6, an air inlet 7, a piston rod 8, a valve needle 9, an end cover 10, a stroke adjustment seat 11, a stroke adjustment screw 12, a cup head screw 13, a first O-ring 14, a second O-ring 15 and a third O-ring 16. The top of the cylinder body 1 is provided with a cylinder head 2, the upper end of the cylinder head 2 is provided with a bolt 3, the lower end of the cylinder head 2 is provided with a positioning column 4, the interior of the cylinder body 1 is provided with a piston 5, and the upper position of the cylinder body 1 is provided with an exhaust port 6. Port 6, an air inlet 7 is provided at the lower position of the cylinder body 1. The cylinder body 1 constitutes the main frame of the device, provides structural support and accommodates internal moving parts. The cylinder head 2 closes the opening of the cylinder, maintains internal pressure and supports other components. The bolt 3 is used to fix the cylinder head to the cylinder body to ensure sealing and stability. The positioning column 4 helps to accurately position the cylinder head and keep it correctly aligned with the cylinder body. The piston 5 moves in the cylinder under the action of gas pressure to control the flow of gas and the movement of mechanical parts. The exhaust port 6 allows used gas to be discharged to maintain the pressure balance in the cylinder. The air inlet 7 controls the entry of fresh gas to provide power for the cylinder operation.

[0025] A piston rod 8 is provided through the piston 5, a valve needle 9 is provided at the lower end of the piston rod 8, an end cover 10 is provided at the bottom end of the cylinder body 1, a stroke adjustment seat 11 is provided at the top end of the piston rod 8, a stroke adjustment screw 12 is provided on the stroke adjustment seat 11, and a cup head screw 13 is provided at the lower end of the piston rod 8. The piston rod 8 is connected to the piston to transmit the linear motion of the piston to drive an external machine or valve. The valve needle 9 is responsible for opening or closing the flow path and controlling the passage of the fluid. The end cover 10 closes the other end of the cylinder to maintain the pressure inside the cylinder and the integrity of the structure. The stroke adjustment seat 11 provides an interface for installing the stroke adjustment screw, allowing the user to adjust the range of motion of the piston. The stroke adjustment screw 12 enables the user to finely adjust the length of the piston stroke and control the working range of the cylinder.

[0026] A first O-ring 14 is provided at the top of the cylinder body 1, a second O-ring 15 is provided at the lower side of the first O-ring 14, the second O-ring 15 is sleeved on the circumference of the cylinder body 1, a third O-ring 16 is provided at the lower side of the second O-ring 15, the third O-ring 16 is sleeved on the circumference of the cylinder body 1, the cup head screw 13 is used to fix or adjust the position of the components to maintain the stability of the structure, the first O-ring 14, the second O-ring 15 and the third O-ring 16 respectively provide effective sealing to prevent gas leakage inside the cylinder, thereby ensuring efficient operation and safety of the system.

[0027] Working principle: In this cylinder device, the working principle and process involve the coordinated action of multiple key components. The cylinder body 1 is located at the core of the device, and a cylinder head 2 is installed on its top, which is fixed by bolts 3 to ensure the sealing and stability of the cylinder. The positioning column 4 is used to ensure the correct position of the cylinder head 2. The internal piston 5 moves up and down through the pressure of the gas to control the airflow and mechanical action. The piston 5 is connected to the valve needle 9 through the piston rod 8. The valve needle 9 is responsible for regulating the flow direction of the fluid. The upper part of the cylinder body 1 is provided with an exhaust port 6 for releasing pressure or used gas, and the lower air inlet 7 is responsible for introducing fresh gas to drive the piston. At the top of the cylinder body 1, the stroke adjustment seat 11 provides a stroke length adjustment function through the stroke adjustment screw 12, so that the operator can adjust the motion range of the piston 5 as needed. The cup head screw 13 is used to fix the position of the piston rod 8 to maintain its stability. Three O-rings (a first O-ring 14, a second O-ring 15 and a third O-ring 16) are respectively installed on the top and the surrounding side of the cylinder body 1. These sealing rings effectively prevent gas leakage and ensure the efficient operation and good sealing performance of the cylinder. This design enables the cylinder to achieve precise pneumatic control in the hot runner system, thereby improving the performance and response speed of the entire system.

[0028] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. An adjustable cylinder for a hot runner, comprising a cylinder body (1), a cylinder cover (2) and bolts (3), characterized in that: A cylinder head (2) is arranged at the top of the cylinder body (1), a bolt (3) is arranged at the upper end of the cylinder head (2), a positioning column (4) is arranged at the lower end of the cylinder head (2), a piston (5) is arranged inside the cylinder body (1), an exhaust port (6) is arranged at the upper position of the cylinder body (1), and an air inlet (7) is arranged at the lower position of the cylinder body (1).

2. The adjustable cylinder for hot runner according to claim 1, characterized in that: A piston rod (8) is provided through the piston (5), and a valve needle (9) is provided at the lower end of the piston rod (8).

3. The adjustable cylinder for hot runner according to claim 2, characterized in that: The bottom end of the cylinder body (1) is provided with an end cover (10), and the top end of the piston rod (8) is provided with a stroke adjustment seat (11).

4. The adjustable cylinder for hot runner according to claim 3, characterized in that: The stroke adjustment seat (11) is provided with a stroke adjustment screw (12), and the lower end of the piston rod (8) is provided with a cup head screw (13).

5. The adjustable cylinder for hot runner according to claim 1, characterized in that: A first O-type sealing ring (14) is arranged at the top of the cylinder body (1).

6. The adjustable cylinder for hot runner according to claim 5, characterized in that: A second O-type sealing ring (15) is arranged on the lower side of the first O-type sealing ring (14), and the second O-type sealing ring (15) is sleeved on the circumference of the cylinder body (1).

7. The adjustable cylinder for hot runner according to claim 6, characterized in that: A third O-type sealing ring (16) is arranged on the lower side of the second O-type sealing ring (15), and the third O-type sealing ring (16) is sleeved on the circumference of the cylinder body (1).

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