A hot runner oil cylinder mounting structure

Abstract

The utility model discloses a hot runner oil cylinder installation structure. It includes a hot runner plate, a hot nozzle, a valve needle, an oil cylinder, a heat insulation component and an oil circuit board. The hot nozzle is arranged on one side of the hot runner plate. The oil cylinder and the oil circuit board are suspended on the other side of the hot runner plate opposite to the hot nozzle through the heat insulation component. The oil cylinder includes a cylinder body and a piston. The piston is fixed on the oil circuit board. The cylinder body moves relative to the piston. The end of the cylinder body away from the piston is connected to one end of the valve needle. The other end of the valve needle passes through the heat insulation component and the hot runner plate and extends into the hot nozzle. The heat insulation component of the utility model allows the oil cylinder to be suspended relative to the hot runner plate to avoid direct conduction from the hot runner plate to the oil cylinder. The oil cylinder does not need a liquid cooling device to dissipate heat during operation, and the cost of the hot runner is reduced. The piston is fixed on the oil circuit board and does not move, and the cylinder body moves. The oil pipe is not easily aged by heat and has a long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runners, in particular to an oil cylinder mounting structure of a hot runner. Background Art

[0002] In the existing hot runner system, the oil cylinder is directly installed on the hot runner plate (i.e., the manifold). Since the hot runner plate needs to be heated to keep the plastic in the runner in a molten state, the heat of the hot runner plate will be transmitted to the oil cylinder, causing the oil cylinder to be in a high-temperature environment, that is, the heat is transferred to the oil pipe of the oil cylinder through the cylinder body, causing the oil pipe to age easily. Therefore, a liquid cooling device is provided between the hot runner plate and the oil cylinder. The liquid cooling device takes away the heat transferred from the hot runner plate to the oil cylinder to ensure the stable operation of the oil cylinder. However, the setting of the liquid cooling device makes the structure of the hot runner system more complicated. Utility Model Content

[0003] The utility model aims to provide a cylinder installation structure with a hot runner having a simple structure and no need for heat dissipation.

[0004] The purpose of the utility model is achieved in this way.

[0005] A hot runner oil cylinder mounting structure comprises a hot runner plate, a hot nozzle, a valve needle and an oil cylinder, wherein the hot nozzle is arranged on one side of the hot runner plate, and further comprises a heat insulation component and an oil circuit board, wherein the oil cylinder and the oil circuit board are suspended on the other side of the hot runner plate opposite to the hot nozzle through the heat insulation component, and the oil cylinder comprises a cylinder body and a piston, wherein the piston is fixed on the oil circuit board, and the cylinder body moves relative to the piston, and one end of the cylinder body away from the piston is connected to one end of the valve needle, and the other end of the valve needle extends into the hot nozzle through the heat insulation component and the hot runner plate.

[0006] The above technical solution can be further improved as follows.

[0007] Furthermore, the heat insulation assembly includes a base and a heat insulation support, one end of the base is connected and fixed to the hot runner plate, the other end of the base is connected and fixed to one end of the heat insulation support, the other end of the heat insulation support is connected and fixed to the oil circuit board, a sliding hole is provided in the heat insulation support, and the cylinder body moves in a limited position in the sliding hole. The base keeps the heat insulation support and the oil cylinder away from the hot runner plate to avoid direct contact and heat conduction.

[0008] Furthermore, a plurality of arms are formed at the other end of the base, and hollow portions are formed between the arms, and the base is connected and fixed to the heat insulating support member through the arms. The design of the arms and the hollow portions reduces the heat conducted from the hot runner plate to the heat insulating support member through the base.

[0009] Furthermore, an anti-rotation ring is provided on the side of the cylinder body facing the hot runner plate, the anti-rotation ring is connected and fixed to the cylinder body, a guide groove is provided on the side wall of the sliding hole, and a guide slider is provided on the anti-rotation ring, and the guide slider moves in the guide groove as the cylinder body moves. There is no direct contact between the cylinder body and the thermal insulation support, so that heat is prevented from being transferred to the cylinder body. At the same time, the assembly accuracy requirements of the cylinder body and the thermal insulation support are reduced.

[0010] Furthermore, a through hole is provided at the center of the base for the valve needle to pass through, and the through hole facilitates the movement of the valve needle.

[0011] Furthermore, the oil circuit board is connected with an oil pipe, and the oil pipe supplies oil to the oil cylinder through the oil circuit board. Due to the heat insulation support and the oil circuit board blocking the heat, the oil pipe is not easy to age.

[0012] Furthermore, the cavity between the bottom surface of the piston and the bottom surface of the cylinder body and the cavity between the side surface of the piston and the side surface of the cylinder body are connected through a channel. The channel allows the hydraulic oil in the oil cylinder to flow, thereby taking away the heat without reducing the thrust of the oil cylinder.

[0013] Furthermore, a throttle valve is provided on the piston, and the passage is formed in the throttle valve. The throttle valve allows the oil in the oil cylinder to flow slowly.

[0014] The utility model heat insulation assembly allows the oil cylinder to be suspended relative to the hot runner plate, avoiding direct heat transfer from the hot runner plate to the oil cylinder. The oil cylinder does not need a liquid cooling device to dissipate heat during operation, and the hot runner cost is reduced. The piston is fixed on the oil plate and does not move, while the cylinder body moves. The oil pipe is not easily aged by heat and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the hot runner.

[0016] Figure 2 Schematic diagram of the cross-sectional structure of the hot runner.

[0017] Figure 3 It is a schematic diagram of the local decomposition structure of the hot runner. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Example 1, see Figure 1-3 As shown, a hot runner oil cylinder mounting structure includes a hot runner plate 1, a hot nozzle 2, a valve needle 3, an oil cylinder 4, a heat insulation component 5 and an oil circuit board 7.

[0020] The hot nozzle 2 is arranged on one side of the hot runner plate 1, and the oil cylinder 4 and the oil circuit board 7 are suspended on the other side of the hot runner plate 1 opposite to the hot nozzle 2 through the heat insulation component 5. The heat insulation component 5 includes a base 8 and a heat insulation support 9. One end of the base 8 is connected and fixed to the hot runner plate 1, and the other end of the base 8 is connected and fixed to one end of the heat insulation support 9, and the other end of the heat insulation support 9 is connected and fixed to the oil circuit board 7. Among them, a plurality of support arms 81 are formed at the other end of the base 8, and a hollow part 82 is formed between the support arms 81. The base 8 is connected and fixed to the heat insulation support 9 through the support arms 81, and a through hole 80 for the valve needle 3 to pass through is provided in the center of the base 8. In this embodiment, the heat insulation support 9 is provided with a mounting hole 91, and the first bolt 51 connects the support arm 81, the mounting hole 91 of the heat insulation support 9 and the oil circuit board 7 together. The oil circuit board 7 is connected with an oil pipe 71, and the oil pipe 71 supplies oil to the oil cylinder 4 through the oil circuit board 7.

[0021] A sliding hole 90 is provided in the heat-insulating support 9, and the oil cylinder 4 moves in a limited position in the sliding hole 90. The oil cylinder 4 includes a cylinder body 41 and a piston 42. The piston 42 is fixed on the oil circuit board 7. The cylinder body 41 moves relative to the piston 42. The end of the cylinder body 41 away from the piston 42 is connected to one end of the valve needle 3, and the other end of the valve needle 3 passes through the heat-insulating component 5 and the hot runner plate 1 and extends into the hot nozzle 2. In this embodiment, a mounting port 43 is provided on the side of the cylinder body 41 facing the oil circuit board 7, and a retaining ring 44 is provided at the mounting port 43. One end of the piston 42 passes through the retaining ring 44 and is connected and fixed to the oil circuit board 7 by a second bolt 52. The piston 42 and the retaining ring 44 are sealed and contacted by a first sealing ring 45, and the piston 42 and the cylinder body 41 are sealed and contacted by a second sealing ring 46. A throttle valve 49 is provided on the piston 42, and the channel in the throttle valve 49 connects the cavity between the bottom surface of the piston 42 and the bottom surface of the cylinder body 41 and the cavity between the side surface of the piston 42 and the side surface of the cylinder body 41.

[0022] An anti-rotation ring 47 is provided on the side of the cylinder body 41 facing the hot runner plate 1. The anti-rotation ring 47 is fixedly connected to the cylinder body 41. A guide groove 92 is provided on the side wall of the sliding hole 90. The anti-rotation ring 47 is provided with a guide slider 48. The guide slider 48 moves in the guide groove 92 as the cylinder body 41 moves.

[0023] In the present invention, the oil pipe 71 is connected to the oil cylinder 4 through the oil circuit in the oil circuit board 7, and the hydraulic oil enters the oil cylinder 4 through the oil pipe 71 and the oil circuit board 7, thereby pushing the cylinder body 41 to move relative to the piston 42, and the cylinder body 41 drives the valve needle 3 to move in the hot nozzle 2. Among them, the hydraulic oil flows slowly in the oil cylinder 4 through the throttle valve 49, so that the hydraulic oil can bring the heat in the oil cylinder 4 back to the oil tank.

Claims

1. A hot runner oil cylinder mounting structure, comprising a hot runner plate, a hot nozzle, a valve needle and an oil cylinder, wherein the hot nozzle is arranged on one side of the hot runner plate, and is characterized in that: It also includes a heat insulation component and an oil circuit plate. The oil cylinder and the oil circuit plate are suspended on the other side of the hot runner plate opposite to the hot nozzle through the heat insulation component. The oil cylinder includes a cylinder body and a piston. The piston is fixed on the oil circuit plate. The cylinder body moves relative to the piston. The end of the cylinder body away from the piston is connected to one end of the valve needle, and the other end of the valve needle passes through the heat insulation component and the hot runner plate and extends into the hot nozzle.

2. The hot runner cylinder mounting structure according to claim 1, characterized in that: The thermal insulation component includes a base and a thermal insulation support. One end of the base is connected and fixed to the hot runner plate, the other end of the base is connected and fixed to one end of the thermal insulation support, and the other end of the thermal insulation support is connected and fixed to the oil circuit board. A sliding hole is provided in the thermal insulation support, and the cylinder body moves in a limited position in the sliding hole.

3. The hot runner cylinder mounting structure according to claim 2, characterized in that: A plurality of supporting arms are formed at the other end of the base, and hollow parts are formed between the supporting arms. The base is connected and fixed to the heat-insulating support member through the supporting arms.

4. The hot runner oil cylinder mounting structure according to claim 3 is characterized in that: An anti-rotation ring is provided on the side of the cylinder body facing the hot runner plate. The anti-rotation ring is fixedly connected to the cylinder body. A guide groove is provided on the side wall of the sliding hole. The anti-rotation ring is provided with a guide slider. The guide slider moves in the guide groove as the cylinder body moves.

5. The hot runner oil cylinder mounting structure according to claim 2, characterized in that: A through hole for the valve needle to pass through is arranged in the center of the base.

6. The hot runner oil cylinder mounting structure according to claim 1, characterized in that: The oil circuit board is connected with an oil pipe, and the oil pipe supplies oil to the oil cylinder through the oil circuit board.

7. The hot runner oil cylinder mounting structure according to claim 1, characterized in that: The cavity between the bottom surface of the piston and the bottom surface of the cylinder body and the cavity between the side surface of the piston and the side surface of the cylinder body are communicated through a channel.

8. The hot runner oil cylinder mounting structure according to claim 7, characterized in that: A throttle valve is arranged on the piston, and the passage is formed in the throttle valve.

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