Hot nozzle of hot runner

Abstract

The utility model discloses a hot nozzle of a hot runner, which relates to the field of hot runner injection molding, and adopts the technical scheme that the hot nozzle comprises a pipe body, the pipe body comprises an upper pipe body and a lower pipe body which are coaxially arranged, the upper pipe body is connected to the lower pipe body in a sliding manner along the axial direction of the upper pipe body, a flow guide pipe is detachably connected in the upper pipe body, and the bottom of the flow guide pipe is accommodated in the lower pipe body. The upper pipe body slides to move in the direction away from the lower pipe body, the length of the pipe body can be increased, the upper pipe body drives the flow guide pipe to move when sliding in the direction away from the lower pipe body, and in the process, the bottom of the flow guide pipe is still contained in the lower pipe body and communicated with the lower pipe body. Then molten plastic particles pass through the flow guide pipe and flow downwards in the flow guide pipe until flowing out of the flow guide pipe, the length of the pipe body can be shortened by sliding the upper pipe body to move in the direction close to the lower pipe body, the length of the pipe body can be adjusted by sliding the upper pipe body, and therefore the pipe body can be matched with molds with different thicknesses for use; the application range is widened.

Description

Technical Field

[0001] The utility model relates to the field of hot runner injection molding, and more specifically, it relates to a hot runner nozzle. Background Art

[0002] A hot runner is a heating component system used in an injection mold to inject molten plastic particles into the cavity of the mold. The hot runner usually consists of components such as a nozzle, a manifold plate, and a housing.

[0003] A hot runner nozzle is a component installed at the connection part between the hot runner and the mold cavity, and has a channel for the molten material to flow through inside, so that the molten plastic particles flowing in the hot runner can smoothly enter the cavity for molding. The nozzle includes a nozzle head and a pipe body.

[0004] However, most of the current hot runner nozzles are of a fixed structure, which makes the length of the pipe body of the nozzle non-adjustable, resulting in a small application range. Therefore, it can only be applicable to molds of a specific thickness, and cannot adjust the use length of the nozzle according to the thickness of the mold. Furthermore, it is necessary to manufacture nozzles of different lengths for use, which is rather inconvenient.

[0005] Therefore, a new solution needs to be proposed to solve this problem. Summary of the Utility Model

[0006] Aiming at the deficiencies existing in the prior art, the purpose of the present utility model is to provide a hot runner nozzle.

[0007] The above technical purpose of the present utility model is achieved through the following technical solutions: A hot runner nozzle includes a pipe body and a nozzle head. The pipe body includes an upper pipe body and a lower pipe body arranged coaxially. The upper pipe body is slidably connected to the lower pipe body along its axial direction. A diversion pipe is detachably connected inside the upper pipe body, and the bottom of the diversion pipe is received inside the lower pipe body. A limiting component is arranged between the upper pipe body and the lower pipe body to limit their relative positions.

[0008] The present utility model is further arranged as follows: The upper pipe body includes a connecting pipe and an installation pipe arranged coaxially. The installation pipe is fixedly connected to the inner wall of the bottom of the connecting pipe. The outer peripheral wall of the installation pipe is mutually attached to the inner peripheral wall of the lower pipe body. The diversion pipe is detachably connected inside the installation pipe. A sliding rod is fixedly connected to the connecting pipe, and a sleeve for receiving the sliding rod to slide is embedded and fixed on the lower pipe body.

[0009] The present utility model is further arranged as follows: The limiting component includes a clamp, a cam handle, a screw rod, and a nut. The clamp is installed on the outer peripheral wall of the sleeve. There is a gap between the clamp and the lower pipe body. Two symmetrically arranged short grooves are opened on the outer wall of the top of the sleeve. The screw rod passes through the clamp and is rotatably connected to the cam handle. The nut is threadedly connected to the screw rod, and the nut abuts against the clamp.

[0010] The present utility model is further configured such that: an external thread is provided on a partial outer peripheral wall of the diversion pipe, and an internal thread for cooperating with the external thread is provided on an inner peripheral wall of the installation pipe.

[0011] The present utility model is further configured such that: an inner diameter of the connecting pipe is larger than an inner diameter of the installation pipe, and a gap exists between the installation pipe and the diversion pipe.

[0012] The present utility model is further configured such that: the upper pipe body, the lower pipe body, and the diversion pipe are all made of copper alloy material.

[0013] In summary, the present utility model has the following beneficial effects: by sliding the upper pipe body in a direction away from the lower pipe body, the length of the pipe body can be increased. When the upper pipe body slides away from the lower pipe body, the diversion pipe is driven to move. During this process, the bottom of the diversion pipe is still accommodated inside the lower pipe body and is in communication with the lower pipe body. Then, the molten plastic particles are passed through the diversion pipe and flow downward inside the diversion pipe until they flow out of the diversion pipe. By sliding the upper pipe body in a direction close to the lower pipe body, the length of the pipe body can be shortened, so that the length of the pipe body can be adjusted by sliding the upper pipe body, thereby matching different thicknesses of molds for use and increasing the scope of application. When the molten plastic particles inside the diversion pipe solidify due to cooling and cause blockage, only the diversion pipe needs to be disassembled from the upper pipe body, and there is no need to disassemble the entire hot nozzle. The diversion pipe can be conveniently disassembled and the inside can be dredged, which can reduce the cleaning difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural view of the present utility model;

[0015] Figure 2 is Figure 1 an enlarged view of part A of

[0016] Figure 3 is a sectional view of the present utility model after removing the limiting assembly.

[0017] In the figure: 1, lower pipe body; 2, diversion pipe; 3, connecting pipe; 4, installation pipe; 5, slide bar; 6, sleeve; 7, clamp; 8, cam handle; 9, screw; 10, nut; 11, short groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present utility model will be described in detail below with reference to the drawings and embodiments.

[0019] Embodiment:

[0020] A hot runner hot nozzle, as Figures 1 to 3As shown, it includes a pipe body and a nozzle. The pipe body includes an upper pipe body and a lower pipe body 1 arranged coaxially. The nozzle is connected to the inner peripheral wall of the lower pipe body 1 away from the upper pipe body by bolts. The upper pipe body is slidably connected to the lower pipe body 1 along its axial direction. A diversion pipe 2 is detachably connected inside the upper pipe body. The bottom of the diversion pipe 2 is accommodated inside the lower pipe body 1. A limiting component for restricting the relative position between the two is arranged between the upper pipe body and the lower pipe body 1. The upper pipe body includes a connecting pipe 3 and an installation pipe 4 arranged coaxially. The installation pipe 4 is welded to the inner bottom wall of the connecting pipe 3. The outer peripheral wall of the installation pipe 4 fits with the inner peripheral wall of the lower pipe body 1. The diversion pipe 2 is detachably connected inside the installation pipe 4. A sliding rod 5 is welded on the connecting pipe 3. A sleeve 6 for accommodating the sliding of the sliding rod 5 is embedded and welded on the lower pipe body 1. The limiting component includes a clamp 7, a cam handle 8, a screw 9 and a nut 10. The clamp 7 is bonded to the outer peripheral wall of the sleeve 6. There is a gap between the clamp 7 and the lower pipe body 1. Two symmetrically arranged short grooves 11 are opened on the outer wall of the top of the sleeve 6. The screw 9 passes through the clamp 7 and is rotatably connected to the cam handle 8. The nut 10 is threadedly connected to the screw 9. The nut 10 abuts against the clamp 7. The upper pipe body, the lower pipe body 1 and the diversion pipe 2 are all made of copper alloy materials.

[0021] Drive the installation pipe 4 to move away from the lower pipe body 1 by sliding the connecting pipe 3. When the connecting pipe 3 moves, it drives the sliding rod 5 to move at the same time. At this time, the sliding rod 5 slides in the sleeve 6 and gradually disengages from the inside of the sleeve 6. Although the sliding rod 5 will gradually be exposed outside and gradually disengage from the sleeve 6, the bottom of the sliding rod 5 is still accommodated in the sleeve 6. When the sliding connecting pipe 3 drives the installation pipe 4 to move away from the lower pipe body 1, the contact area between the outer peripheral wall of the installation pipe 4 and the inner peripheral wall of the lower pipe body 1 gradually decreases, but the bottom of the installation pipe 4 is still accommodated inside the lower pipe body 1. At this time, the distance between the upper pipe body and the lower pipe body 1 gradually increases, and the length of the pipe body can be increased. After increasing the length of the pipe body, at this time, the bottom of the sliding rod 5 is still located inside the sleeve 6. By rotating the nut 10 to lock it and the screw 9 to a certain tightness, then rotate the cam handle 8 to make the cam handle 8 rotate towards the sleeve 6. Due to the existence of the two short grooves 11, the sleeve 6 is gradually squeezed and deformed, and the inner wall of the sleeve 6 and the outer wall of the sliding rod 5 are tightly pressed against each other, and the sliding rod 5 is stably accommodated in the sleeve 6 through friction, providing a clamping force to the sliding rod 5 to achieve the locking effect, improving the stability of the sliding rod 5 in the sleeve 6 and being convenient for operation. When the upper pipe body slides away from the lower pipe body 1, it drives the diversion pipe 2 to move. During this process, the bottom of the diversion pipe 2 is still accommodated inside the lower pipe body 1 and is interconnected with the lower pipe body 1. Then, the molten plastic particles are passed through the diversion pipe 2 and flow downward in the diversion pipe 2 until they flow out of the diversion pipe 2 and flow a short distance in the lower pipe body 1. At this time, the molten plastic particles do not contact the inner peripheral wall of the lower pipe body 1. Then, the molten plastic particles flow into the mold cavity through the nozzle. By sliding the upper pipe body to move it towards the lower pipe body 1, at this time, the sliding rod 5 gradually slides into the sleeve 6, and the contact area between the outer peripheral wall of the installation pipe 4 and the inner peripheral wall of the lower pipe body 1 gradually increases, but there will still be a small distance between the connecting pipe 3 and the lower pipe body 1, and the length of the pipe body can be shortened, so that the length of the pipe body can be adjusted by sliding the upper pipe body, thereby matching the use of molds with different thicknesses and increasing the scope of application. Copper alloy has good heat preservation performance, which can reduce the heat loss of the diversion pipe 2 and reduce the situation that the molten plastic particles solidify due to cooling and cause blockage of the diversion pipe 2.

[0022] Such as Figures 1 to 3As shown in the figure, an external thread is provided on the local outer peripheral wall of the diversion tube 2, and an internal thread for cooperating with the external thread is provided on the inner peripheral wall of the installation tube 4. The inner diameter of the connecting tube 3 is larger than the inner diameter of the installation tube 4, and there is a gap between the installation tube 4 and the diversion tube 2. When the molten plastic particles inside the diversion tube 2 solidify due to cooling and cause blockage, at this time, the diversion tube 2 is disassembled from the upper tube body. Then, by rotating the diversion tube 2, it is separated from the installation tube 4 and the connecting tube 3 respectively. At this time, the external thread on the outer wall of the diversion tube 2 is not thread-connected with the internal thread on the inner wall of the installation tube 4. Because there is a gap between the installation tube 4 and the diversion tube 2, it is convenient to take out the diversion tube 2 from the connecting tube 3. Only by disassembling the diversion tube 2 from the upper tube body, there is no need to disassemble the entire hot nozzle, and the diversion tube 2 can be disassembled conveniently and the inside can be dredged, which can reduce the cleaning difficulty.

[0023] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A hot runner nozzle, comprising a tube body, characterized in that: The tube body comprises an upper tube body and a lower tube body (1) which are coaxially arranged, the upper tube body being slidably connected to the lower tube body (1) along its axial direction, a flow guide tube (2) being detachably connected to the upper tube body, the bottom of the flow guide tube (2) being accommodated in the lower tube body (1), and a limit assembly for limiting the relative position of the upper tube body and the lower tube body (1) being arranged between the upper tube body and the lower tube body (1).

2. A hot runner nozzle according to claim 1, characterized in that: The upper tube body comprises a connecting tube (3) and a mounting tube (4) which are coaxially arranged. The mounting tube (4) is fixedly connected to the inner wall of the bottom of the connecting tube (3). The outer peripheral wall of the mounting tube (4) fits the inner peripheral wall of the lower tube body (1). The flow guide tube (2) is detachably connected to the mounting tube (4). A sliding rod (5) is fixedly connected to the connecting tube (3). A sleeve (6) for accommodating the sliding of the sliding rod (5) is embedded and fixedly provided on the lower tube body (1).

3. A hot runner nozzle according to claim 2, characterized in that: The limiting assembly comprises a clamp (7), a cam handle (8), a screw (9) and a nut (10); the clamp (7) is mounted on the outer peripheral wall of the sleeve (6); a gap exists between the clamp (7) and the lower tube body (1); the top outer wall of the sleeve (6) is provided with two symmetrically arranged short grooves (11); the screw (9) passes through the clamp (7) and is rotatably connected to the cam handle (8); the nut (10) is threadedly connected to the screw (9); and the nut (10) and the clamp (7) are in conflict with each other.

4. A hot runner nozzle according to claim 2, characterized in that: A partial outer peripheral wall of the flow guide tube (2) is provided with an external thread, and an inner peripheral wall of the mounting tube (4) is provided with an internal thread for matching with the external thread.

5. The hot runner nozzle according to claim 2, characterized in that: The inner diameter of the connecting pipe (3) is greater than the inner diameter of the mounting pipe (4), and a gap exists between the mounting pipe (4) and the flow guide pipe (2).

6. The hot runner nozzle according to claim 1, characterized in that: The upper tube body, the lower tube body (1) and the flow guide tube (2) are all made of copper alloy material.

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