Anti-blocking hot nozzle for sub-runner

Abstract

The anti-blocking hot nozzle comprises a nozzle shell and a driving cylinder body, an injection channel is formed in the middle of the nozzle shell, a jet orifice communicated with the injection channel is formed in the lower end of the nozzle shell, a fixing flange is integrally arranged at the upper end of the nozzle shell, and a cylinder body driving part is arranged in the middle of the driving cylinder body. A valve needle capable of elastically stretching relative to the cylinder body driving part is arranged at the lower part of the cylinder body driving part. The driving cylinder body drives the cylinder body driving part in the middle of the driving cylinder body to be pushed out, the cylinder body driving part pushes the valve needle and the ejector pin to move downwards together, and after the valve needle abuts against the injection opening in the bottom of the nozzle shell, blocks the injection opening, is limited by the injection opening, throttled injection molding materials and molded injection molding pieces, the cylinder body driving part continues to push the ejector pin to move downwards. And at the moment, the top of the valve needle extrudes the elastic piece to retract into the cylinder body driving part, the ejector pin extends out of the injection orifice to eject the material handle or the product at the parting surface, and product demolding is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of flow channel processing technology, and in particular to an anti-clogging hot nozzle for flow channels. Background Technology

[0002] Currently, injection molding technology has become a very important production method in industrial production. It has the advantages of fast production speed, high efficiency, and precise dimensions, and is widely used in the molding production of plastic parts. However, the needle valve nozzles of existing molds do not have air ejector pins inside the valve needles. When the mold opens, the parting surface of the needle valve nozzle cannot eject the stalk or product, and the ejector pin cannot achieve the effect of ejecting the product. The collision between the parting surfaces of the two needle valve nozzles in the runner will cause the plastic material to string and flow.

[0003] Therefore, those skilled in the art have provided an anti-clogging hot nozzle for a flow channel to solve the problems mentioned in the background art. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an anti-clogging hot nozzle for a flow channel, including a nozzle housing and a drive cylinder. The nozzle housing has an injection channel in the middle and a spray port communicating with the injection channel at the lower end of the nozzle housing. A fixed flange is integrally provided at the upper end of the nozzle housing. A cylinder drive part is provided in the middle of the drive cylinder. A valve needle that can elastically extend and retract relative to the cylinder drive part is provided at the lower part of the cylinder drive part. A through-hole is provided in the middle of the valve needle. A slidable ejector pin is provided in the needle hole. The top end of the ejector pin is fixedly connected to the cylinder drive part.

[0005] Preferably, the lower part of the cylinder drive unit has a guide hole, the top of the valve needle is fixedly provided with a limiting block, the limiting block can slide in the guide hole, the top of the limiting block is provided with a spring, the opening of the guide hole is threadedly connected to an end cap, the middle of the end cap has a through hole, the lower end of the valve needle passes through the through hole and extends into the injection channel, the ejector pin is provided in the needle hole in the middle of the valve needle, the top of the ejector pin is fixedly provided with a threaded head, and the threaded head is threadedly connected to the top of the guide hole of the cylinder drive unit.

[0006] Preferably, a limiting groove is provided on the upper part of the threaded head and the ejector pin, and the limiting groove plays a limiting role for the limiting block 11.

[0007] Preferably, a fixing flange is fixedly provided at the upper end of the nozzle housing.

[0008] Preferably, a heating copper sleeve is fixedly installed on the outside of the nozzle housing to heat the injection plastic flowing through the nozzle and prevent the injection plastic from cooling and solidifying.

[0009] The technical effects and advantages of this utility model are as follows:

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. The drive cylinder of this utility model pushes out the cylinder drive part in the middle, and the cylinder drive part pushes the valve needle and the ejector pin to move downward together. When the valve needle touches the injection port at the bottom of the nozzle housing and blocks the injection port, the valve needle is limited by the injection port, so that the injection plastic is throttled. After the injection molded part is formed, the cylinder drive part continues to push the ejector pin to move downward. At this time, the top of the valve needle squeezes the elastic element into the cylinder drive part, and the ejector pin extends out of the injection port to push out the material stalk or product at the parting surface, which is conducive to product demolding.

[0012] 2. The heating wire of this utility model is fixedly provided with a reinforcing base at the lower end, and the base is fixedly provided inside the lower end of the air outlet shell; the base fixes the heating wire, making the installation of the heating wire more stable. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the installation state of the anti-clogging hot nozzle for the flow channel provided in the embodiments of this application;

[0014] Figure 2 This is a schematic diagram of the structure of the anti-clogging hot nozzle for the flow channel provided in the embodiments of this application;

[0015] Figure 3 This is a structural diagram of the valve needle 9 in the non-ejected state of the anti-clogging hot nozzle for the diversion channel provided in the embodiments of this application.

[0016] The components include: mounting plate 1, flow divider 2, flow divider channel 3, drive cylinder 4, cylinder drive unit 5, guide hole 6, threaded head 7, limit groove 8, valve needle 9, spring 10, limit block 11, fixing flange 12, ejector pin 13, nozzle housing 14, injection channel 15, heating copper sleeve 16. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0018] Example 1

[0019] Please see Figure 1-3This embodiment provides an anti-clogging hot nozzle for a flow channel, including a nozzle housing 14 and a drive cylinder 4. The drive cylinder 4 is fixedly mounted on a mounting plate 1. An injection channel 15 is opened in the middle of the nozzle housing 14, which communicates with the flow channel 13. A spray port communicating with the injection channel 15 is opened at the lower end of the nozzle housing 14. A fixing flange 12 is integrally provided at the upper end of the nozzle housing 14. A cylinder drive part 5 is provided in the middle of the drive cylinder 4. A valve needle 9 that can elastically extend and retract relative to the cylinder drive part 5 is provided at the lower part of the cylinder drive part 5. A through-hole is opened in the middle of the valve needle 9, and a sliding part is provided in the needle hole. The ejector pin 13 is fixedly connected to the cylinder drive unit 5 at its top. After the injection of plastic is completed, the drive cylinder 4 drives the cylinder drive unit 5 in the middle to push out. The cylinder drive unit 5 pushes the valve pin 9 and the ejector pin 13 to move downward together. When the valve pin 9 touches the injection port at the bottom of the nozzle housing 14 and blocks the injection port, the valve pin 9 is limited by the injection port, so that the injection plastic is throttled. After the injection molded part is formed, the cylinder drive unit 5 continues to push the ejector pin 9 to move downward. At this time, the top of the valve pin 9 squeezes the elastic element and retracts into the cylinder drive unit 5. The ejector pin 13 extends out of the injection port and pushes out the material stalk or product at the parting surface, which is conducive to product demolding.

[0020] The lower part of the cylinder drive unit 5 has a guide hole 6. The top of the valve needle 9 is fixedly provided with a limiting block 11, which can slide in the guide hole 6. A spring 10 is provided on the top of the limiting block 11. The end cap is threaded to the opening of the guide hole 6. A through hole is provided in the middle of the end cap. The lower end of the valve needle 9 extends through the through hole into the injection channel 15. The ejector pin 13 is provided in the needle hole in the middle of the valve needle 9. A threaded head 7 is fixedly provided at the top of the ejector pin 13. The threaded head 7 is threaded to the top of the guide hole 6 of the cylinder drive unit 5. The threaded connection facilitates the replacement of the ejector pin 13. When the valve needle 9 touches the injection port at the bottom of the nozzle housing 14 and blocks the injection port, the valve needle 9 is limited by the injection port. The cylinder drive unit 5 continues to push the ejector pin 9 downward. At this time, the top of the valve needle 9 compresses the spring 10, and the upper part of the valve needle 9 retracts into the cylinder drive unit 5. The ejector pin 13 extends out of the injection port and pushes out the material stalk or product at the parting surface.

[0021] The upper part of the threaded head 7 and the ejector pin 13 is provided with a limiting groove 8, and the limiting groove 9 plays a limiting role for the limiting block 11.

[0022] A fixing flange 12 is fixedly provided at the upper end of the nozzle housing 14, which makes it easier to fix the nozzle housing 14 onto the flow divider 2.

[0023] A heating copper sleeve 16 is fixedly installed on the outside of the nozzle housing 14 to heat the injection plastic flowing through the nozzle and prevent the injection plastic from cooling and solidifying.

[0024] When the mold is being injected, the lower end of the valve needle 9 is detached from the injection port, and the lower end of the ejector pin 13 is located inside the needle hole of the valve needle 9. The lower part of the ejector pin is flush with the lower part of the valve needle, which just blocks the needle hole and prevents the injected plastic from entering the needle hole and affecting the normal sliding of the ejector pin 13 inside the needle hole. The injected plastic is injected into the mold cavity through the injection port.

[0025] In Example 1, the control equipment that enables the device to operate, along with its supporting control system, switches, and drive modules, are provided by the respective manufacturers. Apart from this, the power supply module, circuits, electronic components, and control module involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0026] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A flow channel anti-clogging hot nozzle, comprising a nozzle housing (14) and a drive cylinder (4), wherein an injection channel (15) is formed in the middle of the nozzle housing (14), and a spray port communicating with the injection channel (15) is formed at the lower end of the nozzle housing (14), characterized in that, The nozzle housing (14) is integrally provided with a fixed flange (12) at the upper end. The cylinder driving part (5) is provided in the middle of the driving cylinder (4). The lower part of the cylinder driving part (5) is provided with a valve needle (9) that can elastically extend and retract relative to the cylinder driving part (5). A through-hole is opened in the middle of the valve needle (9). A sliding push pin (13) is provided in the needle hole. The top end of the push pin (13) is fixedly connected to the cylinder driving part (5).

2. The anti-clogging hot runner for a flow channel according to claim 1, characterized in that, The lower part of the cylinder drive unit (5) has a guide hole (6), and the top of the valve needle (9) is fixedly provided with a limiting block (11). The limiting block (11) can slide in the guide hole (6). The top of the limiting block (11) is provided with a spring (10). The opening of the guide hole (6) is threadedly connected to the end cap. The middle part of the end cap has a through hole. The lower end of the valve needle (9) passes through the through hole and extends into the injection channel (15). The ejector pin (13) is provided in the needle hole in the middle of the valve needle (9). The top of the ejector pin (13) is fixedly provided with a threaded head (7). The threaded head (7) is threadedly connected to the top of the guide hole (6) of the cylinder drive unit (5).

3. The anti-clogging hot runner for a flow channel according to claim 1, characterized in that, The upper part of the ejector pin (13) is provided with a limiting groove (8), which limits the limiting block 11.

4. The anti-clogging hot runner for a flow channel according to claim 1, characterized in that, A fixing flange (12) is fixedly installed at the upper end of the nozzle housing (14).

5. The anti-clogging hot runner for a flow channel according to claim 1, characterized in that, A heating copper sleeve (16) is fixedly installed on the outside of the nozzle housing (14) for heating the injection plastic flowing through the nozzle.

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