Miniature integrated closed nozzle

Abstract

The utility model relates to the field of injection nozzles of injection molding machines, in particular to a miniature integrated closed nozzle which comprises a nozzle assembly, the nozzle assembly is composed of a nozzle body, a nozzle flange and a small nozzle, a miniature pneumatic cylinder is arranged in the nozzle body, a sliding needle valve is arranged in the nozzle flange, and the nozzle flange is connected with the small nozzle. One end of the nozzle body is in threaded connection with one end of the nozzle flange, the other end of the nozzle body is connected with an injection molding machine material pipe in a penetrating manner, and the other end of the nozzle flange is in threaded connection with a small nozzle; when the small nozzle is used, the miniature pneumatic cylinder in the nozzle body is driven by an external pneumatic source, the valve needle is pushed to achieve the purpose of closing the small nozzle, and the valve needle is pushed to achieve the purpose of opening the small nozzle by utilizing the pressure generated when an injection molding machine injects glue (in an inlet end pipeline) to act on the area difference between the front end and the rear end of the valve needle; the utility model has the advantages of small volume, high stability, simple structure and convenience in maintenance.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding machine nozzle field, concretely is micro integrated closed nozzle. BACKGROUND

[0002] Injection mold is a kind of tool for producing plastic products, usually installed on injection molding machine and used, and the hot molten plastic raw material is injected into the mold cavity of injection mold by injection molding machine high pressure through hot nozzle during injection molding, and the finished product is obtained after cooling and solidification, and the common closed nozzle realizes glue sealing action by lever principle, and the valve core resets and self-locks under the action of spring.The volume is large, the structure is relatively complex, the injection pressure loss is big, the range is short, and the rear end of the valve core is easy to leak glue, and the requirement of spring is high, so we propose the micro integrated closed nozzle (valve) scheme.The advantage is that the opening and closing action of nozzle (valve) can be stably realized by using external gas (oil) pressure power source, and the built-in gas (oil) pressure cylinder can effectively save installation space.Pipeline valve usually realizes the opening and closing pipeline function manually or by external cylinder drive, and the volume is large and the installation position is high, and there is a security risk for the operator in high temperature environment, so we propose the integrated closed nozzle scheme, and the advantage is that the opening and closing action of nozzle (valve) can be stably realized by using external gas (oil) pressure power source, and the built-in gas (oil) pressure cylinder can effectively save installation space. SUMMARY

[0003] The utility model discloses a micro integrated closed nozzle, including nozzle assembly, the nozzle assembly is by nozzle body, nozzle flange and small nozzle, the inside of nozzle body is provided with micro pneumatic cylinder, the inside of nozzle flange is provided with sliding needle valve, one end of nozzle body is connected with one end of nozzle flange, another end of nozzle body is connected with injection molding machine pipe, another end of nozzle flange is connected with small nozzle.

[0004] Preferably, the nozzle body is provided with a through-flow channel and a built-in pneumatic cylinder, the nozzle flange is provided with a through-flow channel, and the through-flow channel in the nozzle flange and the through-flow channel in the nozzle body are mutually through.

[0005] Preferably, the small nozzle is provided with a nozzle hole, and the needle valve and the nozzle hole are mutually matched.

[0006] Preferably, the nozzle body is provided with a cylinder piston shaft core and a cylinder flange, the piston sealing ring is fixedly installed on the outer wall of the cylinder piston shaft core, and the shaft sealing ring is installed on the cylinder flange.

[0007] Preferably, the nozzle flange is provided with an internal overflow hole.

[0008] Preferably, the needle valve is provided with a valve needle anti-internal leakage sealing surface.

[0009] Preferably, the small nozzle and the nozzle flange are both provided with connecting threads.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] The utility model discloses in using, utilize external air pressure source drive the micro pneumatic cylinder in the nozzle body, push valve needle reaches small nozzle close purpose, utilize the pressure that injection molding machine shot glue (inlet end pipeline) produces and act on the area difference of two ends of valve needle, push valve needle to reach the purpose that small nozzle opens, the utility model discloses have the advantages of small, high stability, simple structure, convenient maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the miniature integrated closed nozzle opening structure assembly schematic drawing of the utility model;

[0013] Figure 2 It is the miniature integrated closed nozzle closing structure assembly schematic drawing of the utility model;

[0014] Figure 3 It is the nozzle body assembly structure schematic drawing of the utility model;

[0015] Figure 4 It is the nozzle flange schematic drawing;

[0016] Figure 5 It is the small nozzle schematic drawing.

[0017] Figure 6 It is the valve needle.

[0018] In the drawing: 1, small nozzle;2, valve needle;3, nozzle flange;4, nozzle body;5, cylinder piston axle core;6, cylinder flange;7, piston sealing ring;8, axle core sealing ring;9, internal leakage overflow hole;10, valve needle anti-internal leakage sealing surface;11, nozzle hole;12, connecting thread. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] Please refer to Figure 1 - Figure 6The utility model discloses a micro integrated closed nozzle, including nozzle assembly, the nozzle assembly is by nozzle body 4, nozzle flange 3 and little nozzle 1 is formed, be provided with micro pneumatic cylinder in the nozzle body 4, be provided with sliding needle valve 2 in the nozzle flange 3, one end of nozzle body 4 is connected with one end of nozzle flange 3, another end of nozzle body 4 is connected injection molding machine material pipe, another end of nozzle flange 3 is connected with little nozzle 1.

[0021] The nozzle body 4 is internally provided with a through-flow channel and a built-in pneumatic cylinder, the nozzle flange 3 is internally provided with a through-flow channel, and the through-flow channel in the nozzle flange 3 and the through-flow channel in the nozzle body 4 are mutually through; so that the plastic fluid can flow along the through-flow channel in the nozzle flange 3 and the through-flow channel in the nozzle body 4.

[0022] The little nozzle 1 is provided with a nozzle hole 11, and the needle valve 2 and the nozzle hole 11 are matched with each other; the needle valve 2 can block the nozzle hole 11 and block the plastic fluid.

[0023] The nozzle body 4 is internally provided with a cylinder piston shaft core 5 and a cylinder flange 6, the outer wall of the cylinder piston shaft core 5 is fixedly installed with a piston sealing ring 7, and the cylinder flange 6 is installed with a shaft core sealing ring 9; the piston sealing ring 7 and the shaft core sealing ring 8 are arranged to ensure the sealing property.

[0024] The nozzle flange 3 is provided with an internal leakage overflow hole 9 at the side; the internal leakage condition of the valve needle 2 and the damage of the micro pneumatic cylinder caused by internal glue leakage (leakage) can be observed and prevented.

[0025] The needle valve 2 is provided with a valve needle internal leakage prevention sealing surface 10; the valve needle 2 realizes the sealing function of the valve needle internal leakage prevention sealing surface 10 at the rear end surface of the valve needle 2 by utilizing the pressure generated by the area difference, and prevents the plastic fluid from flowing out from the valve needle internal leakage prevention sealing surface 10 at the rear end of the valve needle 2.

[0026] The little nozzle 1 and the nozzle flange 3 are both provided with connecting threads 12; the little nozzle 1 and the nozzle flange 3 can be threadedly connected together through the connecting threads 12.

[0027] The utility model discloses a micro integrated closed nozzle, including nozzle assembly, the nozzle assembly is by nozzle body 4, nozzle flange 3 and little nozzle 1 is formed, be provided with micro pneumatic cylinder in the nozzle body 4, be provided with sliding needle valve 2 in the nozzle flange 3, one end of nozzle body 4 is connected with one end of nozzle flange 3, another end of nozzle body 4 is connected injection molding machine material pipe, another end of nozzle flange 3 is connected with little nozzle 1.

[0028] The above is further detailed description of the utility model in combination with specific embodiments, and cannot be determined that the utility model specific implementation is limited to these descriptions. For ordinary skilled in the art to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope determined by the claims submitted by the utility model.

Claims

1. A micro-integrated closed tip nozzle comprising a nozzle assembly, characterized by: The nozzle assembly is composed of a nozzle body (4), a nozzle flange (3) and a small nozzle (1), the nozzle body (4) is internally provided with a micro pneumatic cylinder, the nozzle flange (3) is internally provided with a sliding needle valve (2), one end of the nozzle body (4) is threadedly connected with one end of the nozzle flange (3), the other end of the nozzle body (4) is penetratedly connected with a material pipe of an injection molding machine, and the other end of the nozzle flange (3) is threadedly connected with the small nozzle (1).

2. The micro-integrated closed nozzle according to claim 1, wherein: The nozzle body (4) is internally provided with a through flow channel and a built-in pneumatic cylinder, the nozzle flange (3) is internally provided with a through flow channel, and the through flow channel in the nozzle flange (3) and the through flow channel in the nozzle body (4) are mutually penetrated.

3. The micro-integrated closed nozzle of claim 1, wherein: The small nozzle (1) is provided with a nozzle hole (11), and the needle valve (2) is matched with the nozzle hole (11).

4. The micro-integrated closed nozzle of claim 1, wherein: The nozzle body (4) is internally provided with a cylinder piston shaft core (5) and a cylinder flange (6), the outer wall of the cylinder piston shaft core (5) is fixedly installed with a piston sealing ring (7), and the cylinder flange (6) is installed with a shaft core sealing ring (8).

5. The micro-integrated closed nozzle of claim 1, wherein: The nozzle flange (3) is provided with an internal leakage overflow hole (9) on the side.

6. The micro-integrated closed nozzle of claim 1, wherein: The needle valve (2) is provided with a valve needle internal leakage prevention sealing surface (10).

7. The micro-integrated closed nozzle of claim 1, wherein: The small nozzle (1) and the nozzle flange (3) are all provided with connecting threads (12).

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