Valve needle type hot runner cylinder integral structure

Abstract

The utility model relates to an integral structure of a valve needle type hot runner cylinder. The integral structure comprises a shell, an inner container, a piston and a valve needle main body, the inner container is installed in the shell, a certain gap is reserved between the inner container and the shell, and the gap is filled with heat insulation cotton. The piston is connected into the inner container in a sliding mode. According to the integral structure of the valve needle type hot runner air cylinder, heat in the heat insulation cotton can be effectively absorbed through cooling liquid in the spiral pipe, the temperature of the heat insulation cotton can be reduced, it is ensured that the temperature in equipment is kept within a proper range through a heat exchange mechanism, and the cooling liquid circularly flows between the spiral pipe and the water tank through operation of the water pump; a continuous cooling process is achieved, it is ensured that the cooling liquid is always kept at a low temperature, so that the heat dissipation efficiency is improved, the temperature of the heat insulation cotton is indirectly controlled through circulation of the cooling liquid, the temperature of the whole equipment is kept stable, and performance reduction and part damage caused by overheating are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runner cylinders, in particular to a valve needle type hot runner cylinder integral structure. Background Art

[0002] In the hot runner system of the injection mold, when the method of directly injecting glue on the surface of the product is adopted, in order to avoid the formation of material handles or drawing at the glue inlet on the surface of the product and make the product more beautiful, a valve needle body hot runner system with a single hot nozzle is generally selected. The opening and closing of the glue inlet is controlled by the movement of the valve needle body.

[0003] In the traditional single-nozzle valve needle body hot runner system, the temperature inside the cylinder will change due to the change in the temperature of the processing site. High temperature will cause thermal expansion of the internal parts of the cylinder engine, resulting in a smaller gap between the cylinder wall and the piston, increasing friction, thereby reducing the performance and efficiency of the engine. In addition, high temperature will accelerate the aging and degradation of the lubricating oil in the cylinder engine, reducing its lubrication performance, thereby increasing the risk of wear and failure of engine parts. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a valve needle type hot runner cylinder overall structure, which solves the problem that high temperature will accelerate the aging and degradation of the lubricating oil in the cylinder engine, reduce its lubrication performance, and thus increase the risk of wear and failure of engine parts.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a valve needle type hot runner cylinder integral structure, including a shell, an inner tank, a piston and a valve needle body;

[0006] The inner liner is installed inside the outer shell, and a certain gap is reserved between the inner liner and the outer shell, and the inside of the gap is filled with heat insulation cotton;

[0007] The piston is slidably connected to the interior of the inner tank, the valve needle body is assembled on the piston, and the top end of the valve needle body passes through and extends to the outside of the outer shell, a spiral tube is arranged inside the gap, and the insulation cotton is wrapped on the outside of the spiral tube.

[0008] Furthermore, the upper and lower ends of the shell are respectively connected with an air inlet pipe and an exhaust pipe.

[0009] Furthermore, the spiral tube is gap-fitted between the outer shell and the inner container.

[0010] Furthermore, both ends of the spiral tube penetrate and extend to the outside of the shell.

[0011] Furthermore, a water tank is arranged on the outside of the shell, the upper end of the spiral tube is connected to the water tank, and the lower end of the spiral tube is connected to the water tank through a water pump.

[0012] Furthermore, the spiral tube is a brass tube.

[0013] Furthermore, the water tank is filled with coolant.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] The overall structure of the valve needle hot runner cylinder can effectively absorb the heat inside the insulation cotton through the coolant in the spiral tube, help reduce the temperature of the insulation cotton, and ensure that the temperature inside the equipment is maintained within an appropriate range through a heat exchange mechanism. The operation of the water pump causes the coolant to circulate between the spiral tube and the water tank, achieving a continuous cooling process and ensuring that the coolant always maintains a low temperature, thereby improving the heat dissipation efficiency. The temperature of the insulation cotton is indirectly controlled through the circulation of the coolant, so that the temperature of the entire equipment remains stable, avoiding performance degradation and component damage due to overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 3 This is a rear view structural diagram of the utility model;

[0019] Figure 4 It is a front structural schematic diagram of the utility model.

[0020] In the figure: 1. outer shell; 2. inner shell; 3. piston; 4. valve needle body; 5. gap; 6. spiral tube; 7. water tank; 8. water pump. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1 In this embodiment, a valve needle type hot runner cylinder overall structure is used to protect the components inside the cylinder to prevent excessive temperature from affecting the normal operation of the cylinder.

[0023] Specifically, it includes an outer shell 1, an inner shell 2, a piston 3 and a valve needle body 4; the inner shell 2 is installed inside the outer shell 1, and a certain gap 5 is reserved between the inner shell 2 and the outer shell 1, and the inside of the gap 5 is filled with heat insulation cotton; the piston 3 is slidably connected to the inside of the inner shell 2, the valve needle body 4 is assembled on the piston 3, and the top end of the valve needle body 4 passes through and extends to the outside of the outer shell 1, a spiral tube 6 is arranged inside the gap 5, and the heat insulation cotton is wrapped around the outside of the spiral tube 6, and the upper and lower ends of the outer shell 1 are respectively connected with the intake pipe and the exhaust pipe.

[0024] In actual settings, the heat conduction can be effectively reduced by setting the gap 5, and by filling the gap 5 with thermal insulation cotton, the interface effectively reduces the heat exchange between the internal and external temperatures, thereby improving the thermal insulation performance.

[0025] In addition, by injecting coolant into the interior of the spiral tube 6 and wrapping the insulation cotton on the outside of the spiral tube 6, the temperature inside the insulation cotton can be transferred to the coolant inside the spiral tube 6, thereby reducing the temperature of the insulation cotton and effectively preventing heat from being conducted to the inside of the cylinder.

[0026] It should be noted that the spiral tube 6 is gap-fitted between the outer shell 1 and the inner tank 2, and both ends of the spiral tube 6 pass through and extend to the outside of the outer shell 1. A water tank 7 is provided on the outside of the outer shell 1. The upper end of the spiral tube 6 is connected to the water tank 7, and the lower end of the spiral tube 6 is connected to the water tank 7 through a water pump 8.

[0027] In actual use, by filling the water tank 7 with coolant, the water pump 8 can be operated to extract the coolant in the water tank 7 and transport it to the inside of the spiral tube 6. When the coolant is transmitted inside the spiral tube 6, the heat inside the thermal insulation cotton is absorbed and circulated in sequence, so that the coolant in the water tank 7 passes through the spiral tube 6 in sequence, and then effectively absorbs the heat in the thermal insulation cotton, thereby reducing the temperature of the thermal insulation cotton.

[0028] Preferably, in order to ensure the heat absorption effect of the spiral tube 6, the spiral tube 6 in this embodiment is a brass tube.

[0029] In actual settings, the coolant in the spiral tube 6 can effectively absorb the heat inside the insulation cotton, helping to lower the temperature of the insulation cotton. The heat exchange mechanism ensures that the temperature inside the equipment is maintained within an appropriate range. The operation of the water pump 8 causes the coolant to circulate between the spiral tube 6 and the water tank 7, achieving a continuous cooling process and ensuring that the coolant always maintains a low temperature, thereby improving the heat dissipation efficiency. The circulation of the coolant indirectly controls the temperature of the insulation cotton, so that the temperature of the entire equipment remains stable, avoiding performance degradation and component damage due to overheating.

[0030] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve needle type hot runner cylinder integral structure, characterized in that: It comprises an outer shell (1), an inner shell (2), a piston (3) and a valve needle body (4); The inner liner (2) is installed inside the outer shell (1), and a certain gap (5) is reserved between the inner liner (2) and the outer shell (1), and the inside of the gap (5) is filled with heat insulation cotton; The piston (3) is slidably connected to the interior of the inner tank (2), the valve needle body (4) is assembled on the piston (3), and the top end of the valve needle body (4) penetrates and extends to the outside of the outer shell (1), a spiral tube (6) is arranged inside the gap (5), and the heat insulation cotton is wrapped on the outside of the spiral tube (6).

2. The valve needle type hot runner cylinder integral structure according to claim 1, characterized in that: The upper and lower ends of the outer shell (1) are respectively connected to an air inlet pipe and an air outlet pipe.

3. The valve needle type hot runner cylinder integral structure according to claim 1, characterized in that: The spiral tube (6) is loosely fitted between the outer shell (1) and the inner container (2).

4. The valve needle type hot runner cylinder integral structure according to claim 1, characterized in that: Both ends of the spiral tube (6) penetrate through and extend to the outside of the outer shell (1).

5. The valve needle type hot runner cylinder integral structure according to claim 1, characterized in that: A water tank (7) is arranged outside the housing (1); the upper end of the spiral tube (6) is connected to the water tank (7); and the lower end of the spiral tube (6) is connected to the water tank (7) via a water pump (8).

6. The valve needle type hot runner cylinder integral structure according to claim 5, characterized in that: The spiral tube (6) is a brass tube.

7. The valve needle type hot runner cylinder integral structure according to claim 5, characterized in that: The water tank (7) is filled with cooling liquid.

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